Tires/Tubes

Precision engineered for precise inflation of your Zipp wheels, these Zipp Tangente Valve Extenders take the hassle out of short Presta valves. - For use with threaded Presta (non-removable core) tubes - Knurled end to keep pump from slipping - Available in all lengths to match all Zipp wheels - 3mm hex broach in the barrel to guarantee a perfect seal when tightened

- Designed to improve rotational stability by decreasing rotational mass at the valve body - Lightweight aluminum Presta-valve body - Removable valve core - Extenders are available and sold separately

Works with Zipp butyl inner tubes with a removable core as well as other leading tubular tires and inner tubes that have removable cores. Available as a kit (3 extenders and 2 wrenches) or individually. - For use with removable valve core Presta tubes - Knurled end to keep pump from slipping - 3mm hex broach in the barrel to guarantee a perfect seal when tightened - Integrated air seal

• Synthetic elastomer gasket with 2X the holding power and 5X wear resistance of traditional gasket materials • Two stage seal design, improves sealing and stability on all presta valve stems • Adjustable compression, user can tighten the cap to increase holding power by 4X and compensate for wear •15 degree stem angle reduces stress on the valve stem from pump hose • 12.0g

Tubeless Valve/Tape Kit - Includes Tape, 2 Universal Valves & 1 Valve Core Wrench

The Zipp G40 XPLR is a wide (40mm) tire designed for control, which translates in the gravel world to higher overall speed. In developing this tire, Zipp began with a speed-carrying chevron center-tread pattern that transitions to an inverted soccer cleat design, then added XC-style knobs on the edges that offer the ability to dig in when you need it. And, amid all this, durability was crucial. The tire's casing and bead-to-bead puncture protection strip navigates the fine line between supple and stiff so that grip and performance do not suffer while making an incredibly durable gravel tire. The tire's 40mm width was carefully selected to be most effective with its tread pattern while also fulfilling riders' evolving preferences for wider tires during gravel events and off-pavement riding. It's just what you need for gnarly, all-day riding. It performs exceptionally well with Zipp's widest and most versatile 700c rim, the 303. - High-performance gravel and adventure tire - Aggressive cornering side knobs for excellent control - Fast-rolling center section - 30-65 psi - Tubeless Ready, tube compatible - Hookless compatible - ETRTO 40-622 (700x40c) - 120 TPI - Tan sidewall - Aramid bead-to-bead puncture protection that is very resistant to sidewall cuts - Hookless compatible - Weight: 480g

- Shim adds support to Presta stem used in a Schrader rim

It’s all in the name, ThickSlick. Made with a burly casing designed to withstand the roughest urban conditions, while the no-nonsense, slick design provides the bite you need in the concrete jungle. Need more rubber? The nearly indestructible Flat Guard level, with its Urban Armor Casing and added rubber everywhere, provides optimal protection to contend with any city streets. It's no one wonder why this tire has a cult following among couriers, those not wanting to deal with flats, and value-conscious consumers. ThickSlick Benefits: - Puncture Protection: The thicker a tire, the harder it is for glass, pins, staples, and other urban unpleasantries to worm their way in. - 2x the Rubber: Twice the rubber tread equates to twice the lifespan of a tire. This means your price is 50% off the competition. - Smoother Ride Quality: Twice the rubber makes for a smoother ride through the natural absorption qualities of rubber. - Usage: Urban, Recreation, Utility - Conditions: Road

The All Terrain is always up for adventure. From long-distance touring to light-duty offroading, this tire offers impeccable handling that won't let you down. Usage: Trekking / Comfort Conditions: Dry to Damp / Pavement to Hardpack Compound: DNS Casing: Durable Bead: Wire 26" Comp - Tube Type: 635g 32c Comp - Tube Type: 455g 37c Comp - Tube Type: 540g

It’s all in the name, ThickSlick. Made with a burly casing designed to withstand the roughest urban conditions, while the no-nonsense, slick design provides the bite you need in the concrete jungle. Need more rubber? The nearly indestructible Flat Guard level, with its Urban Armor Casing and added rubber everywhere, provides optimal protection to contend with any city streets. It's no one wonder why this tire has a cult following among couriers, those not wanting to deal with flats, and value-conscious consumers. ThickSlick Benefits: - Puncture Protection: The thicker a tire, the harder it is for glass, pins, staples, and other urban unpleasantries to worm their way in. - 2x the Rubber: Twice the rubber tread equates to twice the lifespan of a tire. This means your price is 50% off the competition. - Smoother Ride Quality: Twice the rubber makes for a smoother ride through the natural absorption qualities of rubber. - Usage: Urban, Recreation, Utility - Conditions: Road

Tight enough tread spacing for high speed, drag-free onslaughts, yet blocky and tall enough to really dig in when it comes time to slam on the brakes. A rounded profile and staggered, supportive side knobs keep clamoring for traction even as the trail loses its camber. Most often used as a rear tire, the Trail Boss also keeps the front in check on hardpack trails. Want to go out and own it? Be the Trail Boss. Usage: XC / Trail / All Mountain Conditions: Dry to Damp / Hardpack to Loam - 26 x 2.25 TCS Light/Fast Rolling: 700g, Dual DNA compound - 26 x 2.25 TCS Tough/Fast Rolling: 900g, Dual DNA compound - 26 x 2.25 Comp Tube-Type: 900g, DNA compound

Tight enough tread spacing for high speed, drag-free onslaughts, yet blocky and tall enough to really dig in when it comes time to slam on the brakes. A rounded profile and staggered, supportive side knobs keep clamoring for traction even as the trail loses its camber. Most often used as a rear tire, the Trail Boss also keeps the front in check on hardpack trails. Want to go out and own it? Be the Trail Boss. Usage: XC / Trail / All Mountain Conditions: Dry to Damp / Hardpack to Loam - 29 x 2.25 Comp Tube-Type: 967g, DNA compound

WTB`s first tire specifically designed for use with E-bikes. - Textured tread surface and water channeling grooves provide impressive traction in all conditions - A reflected strip on the sidewall further improves safety and visibility in low light - DNA - Proprietary 60A durometer rubber compound offers the ideal mix of rolling efficiency and traction for Cross-Country and trail riding applications - EBIKE25 - has achieved a passing rating for use with E-Bikes up to 25kph - FG - Flat Guard, features an Urban Armor Casing, which provides additional rubber throughout the entire casing and sidewall to deliver additional puncture protection and durability - REF - Reflective accents or hot patch on sidewall

The Byway Road Plus tire allows riders to find comfort on remote gravel roads without being slowed down on the pavement required to reach them. Staying true to its road usage, a slick centerline borders angular hatching to keep everything smooth on sections of pavement. Intermediate, diamond-shaped peaks provide steadfast traction under power, while consistent and more substantial knobs extend down the side to protect it against ill-intentioned rocks or gashes while exploring new areas. - Road Plus TCS: Sealant optimized lightweight casing with folding TCS aramid bead and Dual Compound DNA rubber - SG2 bead-to-bead puncture protection provides improved air retention, and offers 80% more sidewall protection vs traditional single-ply tires - TCS Light Fast-Rolling: Lightweight casing with TCS aramid bead and Dual Compound DNA rubber (60a center/50a sides)

Nano 40 is built for speed. A nearly uninterrupted centerline provides swift efficiency on hardpack terrain while staggered outer knobs allow you to stay on the gas while hammering up chunky climbs or hanging on through loose gravel corners. The high-volume 40mm casing allows for lower tire pressures and a smoother ride while still reducing drag and rolling resistance. This makes for an all-out gravel destroyer that still appeases those clamoring for a truly big cyclocross tire. Everybody's irrefutable favorite, 'nough said. SG2 PUNCTURE PROTECTION: This tire is available with our all-new SG2 Puncture Protection, which is a lightweight nylon insert that provides bead-to-bead coverage and ensures every area of the tire is defended against slashes and punctures. As events become progressively rougher and cyclists pedal farther, gravel gets tougher. It only makes sense for gravel tires to become tougher as well. - Nylon fibers have a flat profile, which reduces the amount of rubber needed to fill the gaps between fibers and minimizes weight. - Protected SG2 gravel tires feature a 120tpi casing, which improves suppleness compared to a traditional 60tpi tire. - SG2 was specifically designed to be a puncture protection layer, but it also improves air retention and eliminates seeping at the sidewall. FEATURES: - Minimal rolling resistance due to raised, consistent centerline tread. - Long, staggered knobs provide steadfast traction without cutting down on speed. - TCS Light/Fast Rolling versions of the Nano 40 tire provide ultimate tubeless reliability for gravel or cyclocross racing. - Race and Comp level tires are designed to provide optimal performance at a competitive weight but must be used with inner tubes. Race and Comp level tires are not tubeless compatible.

Built for unfaltering speed through a wide range of conditions, the Riddler delivers added gusto for the rider who places equal priority on traction and efficiency. The Riddler 37 keeps your legs on their game for hours on end and provides tenacious grip in the corners. Incredibly versatile, the Riddler 45 expands the horizons of gravel riding and accommodates longer dirt tours with ease. Equally at home on your local CX course or gravel B-roads - what else do you need? SG2 PUNCTURE PROTECTION: These tires are available with our all-new SG2 Puncture Protection, which is a lightweight nylon insert that provides bead-to-bead coverage and ensures every area of the tire is defended against slashes and punctures. As events become progressively rougher and cyclists pedal farther, gravel gets tougher. It only makes sense for gravel tires to become tougher as well. - Nylon fibers have a flat profile, which reduces the amount of rubber needed to fill the gaps between fibers and minimizes weight. - Protected SG2 gravel tires feature a 120tpi casing, which improves suppleness compared to a traditional 60tpi tire. - SG2 was specifically designed to be a puncture protection layer, but it also improves air retention and eliminates seeping at the sidewall. FEATURES: - Aggressive cornering knobs meet a low-profile center tread. - Riddler 37 is an excellent choice for gravel grinding or dry cyclocross courses. - Riddler 45 is excellent for gravel exploration or drop bar bikepacking - Available with black or tan sidewalls.

WTB's Sendero is for those who believe sending it shouldn't be limited to mountain bikes. As the first Road Plus tire designed solely with dirt in mind, the Sendero combines drop-bar efficiency with the capabilities of an aggressive tread pattern. Ramped center knobs minimize rolling resistance while substantially spaced outer knobs ensure footing in loose terrain. Sendero was designed to be an aggressive tire without compromise. Looking to ride mountain bike tires on your drop bar bike? The Sendero is for you. FEATURES: - Aggressive tread pattern compliments the high-volume Road Plus format to combine drop bar efficiency and mountain bike traction - Rounded profile with vertical channels to enhance cornering characteristics - High volume casing enables comfortable ride - Dual Compound Rubber means a fast rolling tire with great corning traction

Vulpine is the latest race-focused addition to WTB’s line of beloved gravel tires. Tightly spaced center knobs form a nearly uninterrupted centerline to decrease rolling resistance while the rest of the tread is packed with short knobs to further promote efficiency, minimize the chance of punctures, and deliver predictable cornering traction. Vulpine prioritizes all-out efficiency without sacrificing climbing or braking traction and is the perfect tire for gravel racers looking to lead the pack as well as daily riders in search of an efficient tire that excels on many surfaces including pavement, hardpack and gravel. Available in 36, 40 and 45 widths. Round Profile Overall knob profile mimics a high-volume road tire, which provides equal cornering confidence in a variety of different terrains and conditions. Efficient Knob Spacing Tightly spaced center knobs form a nearly uninterrupted centerline that decreases rolling resistance while the rest of the tread is packed with short knobs to further promote efficiency and minimize punctures. Fast Centerline The smooth rolling surface of the Vulpine reduces rolling resistance and improves tread longevity, resulting in a longer lifespan than other gravel tires. TCS Tubeless-Ready TCS (Tubeless Compatible System) is WTB's standardized tubeless rim/tire system. TCS tubeless-ready compatible tires eliminate the need for tubes, reduces weight, and accommodates lower tire pressures for improved traction and comfort compared to a traditional tube-type tire. SG2 Puncture Protection SG2 is our puncture protection technology that provides bead-to-bead coverage to ensure both the tread and sidewall are protected from slashes and punctures. The nylon fibers within SG2 feature a uniquely flat profile, which reduces the amount of rubber needed to fill the gaps between fibers. Improving the fiber-to-rubber ratio increases puncture resistance, reduces weight and improves the overall liveliness of a tire. While SG2 is primarily a puncture protection layer, the tightly woven fibers also improve air retention to better maintain pressure between rides. SG Puncture Protection WTB’s SG tires start at the material level, specifically formulated for superior sidewall protection and increased air retention in high-pressure tires. Sidewall Protection: The extra layer defends most exposed areas of the tire and improves air retention for high-pressure tires. Dual DNA Dual DNA rubber compound combines harder, faster-rolling center sections with softer, grippier shoulders for optimal performance and weight. Additionally, each tire is equipped with robust SG puncture protection to ensure durability and reliability on any terrain. Black or Tan Sidewalls It's nice to have options, which is why most of our gravel tires are available with either black or tan sidewalls. Traditional black sidewalls tend to blend in with the components and wheels of a bike and may look sleeker in the eyes of some riders. WTB tanwall tires blend retroesque looks with modern technology to create an iconic look that has become synonymous with high-performance gravel. Looks aside, gram counters may choose our tan tires because the compounds used to make them are slightly lighter than those used to manufacture black sidewalls. Zero Plastic Packaging All new WTB tires are packaged using 100% recycled materials and zero plastic. Our engineers and marketing team are constantly working towards reducing the amount of packaging our products requiring, while still providing you with the necessary information to make an informed purchasing decision. It's no small task, but minimizing the total amount of packaging has become an integral part of product development. This results in simplistic packaging using more recycled materials and less zip ties. In the next few years, we're working to ensure 100% of WTB packaging goes in the recycling bins.

Proven WTB performance now expanded to high-end road that won't fall apart when taken past the traditional tarmac. The all-new, multilayered construction of the tubeless Supple Casing delivers a soothingly smooth ride quality without deteriorating under varied conditions. Elite-level road meets renowned tubeless simplicity in sizes that accommodate exploration while digging deep on lonesome roads. - Road TCS: Sealant optimized supple casing with folding TCS aramid bead and Distance + rubber compound - Ideal for distance rides where surfaces may vary - SG2 bead-to-bead puncture protection provides improved air retention, and offers 80% more sidewall protection vs traditional single-ply tires - TCS Light Fast-Rolling: Lightweight casing with TCS aramid bead and Dual Compound DNA rubber (60a center/50a sides)

Resolute is the ultimate all-weather gravel tire for those who don't want to fuss with conditions-specific tires for every season. Small, square knobs deliver consistent bite into a variety of terrain, while the ample spaces between them prevent packing up when conditions become fun (a.k.a wet). Truly all-season in nature, the Resolute's 42mm width makes it a set-it-and-forget-it gravel tire for endlessly undulating roads through all varieties of weather. Now available in 50mm width making the go to tire of choice for any adventure rider. Mud-Shedding Design Widely spaced square knobs deliver consistent traction while shedding mud or clay with ease. Performs well in all conditions, which means there is no longer a need to swap tires based on the weather. Consistent Square Knobs There are numerous ways to increase the speed of a gravel tire, but consistently spaced knobs with substantial surface area is the best way to achieve it. Resolute excels in efficiency by staying on the surface of the terrain until pedaling or braking forces it to dig in. Supported Outer Knobs Rows of outer knobs are connected by a supportive base that runs the entire circumference of the tire. Additional rubber at the knob bases allow them to dig in without the unsettling feeling of a knob folding while cornering. This make the Resolute one of the most confidently cornering gravel tires in our line. TCS Tubeless-Ready TCS (Tubeless Compatible System) is WTB's standardized tubeless system. These tires feature a TCS tubeless-ready casing, which nearly eliminates flats and allows lower tire pressures to improve traction and comfort over a traditional tube-type tire. Available with SG2 puncture protection SG2 is our unique puncture protection technology that provides bead-to-bead coverage to ensure both the tread and sidewall are protected from slashes and punctures. The nylon fibers within SG2 feature a uniquely flat profile, which reduces the amount of rubber between fibers. Improving the fiber-to-rubber ratio increases puncture resistance, reduces weight and improves the overall liveliness of a tire. While SG2 is primarily a puncture protection layer, its tightly woven fibers also improve air retention to better maintain pressure between rides. Black or Tan Sidewalls It's nice to have options, which is why most of our gravel tires are available with either black or tan sidewalls. Traditional black sidewalls tend to blend in with the components and wheels of a bike and may look sleeker in the eyes of some riders. WTB tanwall tires blend retroesque looks with modern technology to create an iconic look that has become synonymous with high-performance gravel. Looks aside, gram counters may choose our tan tires because the compounds used to make them are slightly lighter than those used to manufacture black sidewalls. Description missing for this image. ZERO PLASTIC PACKAGING All new WTB tires are packaged using 100% recycled materials and zero plastic. Our engineers and marketing team are constantly working towards reducing the amount of packaging our products requiring, while still providing you with the necessary information to make an informed purchasing decision. It's no small task, but minimizing the total amount of packaging has become an integral part of product development. This results in simplistic packaging using more recycled materials and less zip ties. In the next few years, we're working to ensure 100% of WTB packaging goes in the recycling bins. Usage: Gravel / Monstercross Conditions: Dry to Wet / Hardpack to Loose Gravel - 650B: 440g - 700c: 460g

Vulpine S is the gravel revamp of a proven semi-slick mountain tread with years of swift efficiency under its belt. The slick centerline decreases rolling resistance while its round tire profile is packed with short, tightly-spaced knobs to provide predictable cornering traction on hardpack terrain. The Vulpine S is the fastest tire made by WTB. - Similar design as the beloved Vulpine Gravel tire with the exception of a smooth centerline for increased speed - Low, tightly spaced transition knobs with plenty of working edges to provide braking and cornering traction both on and off the pavement - Round tread profile to allow smooth cornering on pavement, hardpack, and dirt - 100% Recycled and Recyclable Packaging - SG provides an extra layer for sidewall protection and increased air retention in high-pressure tires

The Vulpine S is the fastest tire we make. Vulpine S is the latest race-focused addition to WTB’s line of beloved gravel tires. Vulpine S is the gravel revamp of a proven semi-slick mountain tread with years of swift efficiency under its belt. The slick centerline decreases rolling resistance while its round tire profile is packed with short, tightly-spaced knobs to provide predictable cornering traction on hardpack terrain. Fastest tire we make For racers aiming to maximize straight-line speed without sacrificing grip in the corners, Vulpine S is the perfect choice. A solid centerline delivers pure speed, while tightly packed small knobs bite into the dirt as you lean through turns. Fastest Centerline The smooth rolling surface of the Vulpine S reduces rolling resistance and improves tread longevity, resulting in a longer lifespan than other gravel tires. Round Profile Overall knob profile mimics a high-volume road tire, which provides equal cornering confidence in a variety of different terrains and conditions. TCS Tubeless Ready TCS (Tubeless Compatible System) is WTB's standardized tubeless rim/tire system. TCS tubeless ready compatible tires eliminate the need for tubes, reduces weight, and accommodates lower tire pressures for improved traction and comfort compared to a traditional tube-type tire. SG Puncture Protection WTB’s SG tires start at the material level, specifically formulated for superior sidewall protection and increased air retention in high-pressure tires Sidewall Protection: The extra layer defends most exposed areas of the tire and improves air retention for high-pressure tires. Dual DNA Dual DNA rubber compound combines harder, faster-rolling center sections with softer, grippier shoulders for optimal performance and weight. Additionally, each tire is equipped with robust SG puncture protection to ensure durability and reliability on any terrain. Zero Plastic Packaging All new WTB tires are packaged using 100% recycled materials and zero plastic. Our engineers and marketing team are constantly working towards reducing the amount of packaging our products requiring, while still providing you with the necessary information to make an informed purchasing decision. It's no small task, but minimizing the total amount of packaging has become an integral part of product development. This results in simplistic packaging using more recycled materials and less zip ties. In the next few years, we're working to ensure 100% of WTB packaging goes in the recycling bins. Tried and True Gravel racers Whitney and Zack Allison put the Vulpine S to the test during the 8-day Transcordilleras bikepacking gravel race in Colombia, as well as the grueling 200-mile Unbound Gravel in Kansas, among other events.

- Midsize, well-spaced, square knobs with alternating staggered center line of single and dual knobs - Round overall profile with ramped knobs rolls well and sheds dirt and mud efficiently - Siped knobs provide plenty of edges for gripping rocky or uneven terrain - Light - Lighter weight compound conforms to trail objects while still providing a happy balance between low rotational weight and reliability - HG - High Grip, 45a durometer, glue-like conforming rubber over a firmer 60a durometer supportive base for uncanny traction - TT - WTB`s new triple compound, TriTec, featuring a hard base level, medium center knobs, and softer shoulder knobs for improved traction and performance - SG2 - Defends all surfaces of a tire by providing an uninterrupted layer of puncture protection from bead to bead

Searching for the ultimate do-all plus tire? Meet the Ranger...bikepacking approved, trail ready. Weight-optimized to outperform in all environments and excel on longer rides—dry to wet, hardpack or loam, the Ranger isn’t intimidated. - Excellent do-all tire that excels in various conditions ranging from hardpack to wet trails - Multi-directional siping provides increased traction whether accelerating, braking, or cornering - Huge variety of size and rubber types to choose from

Aggressive, premier and unwavering...those were words we used to describe the highly esteemed Vigilante 2.3, and they still ring true for these wider brethren. We simply dreamt of ripping trails on wider versions of our favorite aggressive mountain tire. We wouldn't hand you spineless claims about vast improvements unless they were true. The new Vigilante has received a substantial increase in both the height and surface area of the side knobs. Tall, stout outer knobs not only dig deeper, but also start digging sooner in the initial stages of cornering. Wider, taller, and more aggressive in every way: the new Vigilante. TriTec And Slash Guard: All Vigilante tires feature TriTec Compound, which utilizes three rubber compounds to provide different levels of traction, support, and durability based on their placement within the tread. The entire tread pattern is supported by a base of high-durometer rubber, which also transitions halfway into the height of the knobs and allows for the use of softer knob compounds without the tire folding under cornering forces. The top of the center knobs consist of a medium-durometer compound to provide traction and durability without sacrificing rolling efficiency, while the outer knobs feature the softest compound to deliver maximum grip and slow rebound. All TCS Light versions of the new WTB tires feature Slash Guard technology, which incorporates a protective nylon insert spanning the entire sidewall to provide extra protection without the weight of a dual-ply TCS Tough casing. - Square-lugged knobs deliver unwavering traction, yet benefit from added height to ensure they dig even deeper into loose, unpredictable terrain. - Updated siping arrangement places emphasis on cornering forces, while the larger knobs don't discriminate against shamelessly forceful cornering or reckless braking. - Increased circumferential spacing allows the tread to remain clear in sloppy conditions, while still keeping the casing protected from spiteful rocks. - Vigilante is optimized for use with i29 rims.

Vittoria introduces Universal Sealant, the new range of anti-puncture bike tire sealants designed for Road and MTB use. The formula of the sealant has been improved. Universal Sealant does not contain ammonia, repairs larger punctures (up to 7mm), acts faster, and is compatible with both Road and MTB tubeless tires and with any type of inner tube. It is easy to use thanks to its specific pour spout that allows the application of the sealant straight from the valve. Universal Sealant is the universal anti-puncture bike tire sealant.

The premium latex inner tube for cyclists who require the best performances. Latex tubes are light, supple, and they generate low friction between the tire. All these characteristics work together to reduce rolling resistance. - Light and supple - Reduced rolling resistance - Removable valve core

You'll ride with peace of mind when you pack a can of Vittoria's Pit Stop Tire Sealant. It contains pure latex foam sealant and compressed air to quickly inflate and repair your tire so you can get on with your ride. Available in three sizes for varying tire volumes: - Road Racing: inflates 21-28-inch tubulars up to 94 psi and 700c clinchers up to 87 psi so you can ride, instead of walk to the closest pump and top off the tire to full pressure. - 75mL: Repairs and inflates low-volume MTB tires in less than a minute. - 100mL: Repairs and inflates meaty 27.5-inch tires and cross country 29-inch tires in less than a minute.

Whether in gravel or cyclocross, one thing is for certain—course conditions are constantly changing. When you roll up to the start line, be confident knowing that you have the performance advantage of the Terreno Mix all-conditions tread. At the heart of the design is a fast-rolling center ridge, designed to minimize rolling resistance while still providing confident braking traction. Cornering and off-camber work is confidently handled by alternating open shoulder lugs. These lugs are shaped to allow a supple feel for pavement and hardpack surfaces while still offering a solid effective edge for grass and loam terrain. If you are looking for that one tire to do it all, Terreno Mix is your choice! - Open shoulder lugs for secure off-camber traction - Traditional tread profile for smooth transitions across a broad range of terrain

The Terreno Zero features a Corsa-inspired tread design for paved surfaces and hard-packed gravel. The smooth center rolls fast while the side tread "scales" provide durable bite when cornering and braking. - Designed for paved surfaces and hard-packed gravel - Graphene compound