Tires/Tubes

- Polyurethane tube - Twice as strong as a regular butyl tube - Super lightweight - Very compact

BOS is the airport code for Boston, Massachusetts, the original hotbed of North American ‘cross and home to some of the harshest weather and the toughest courses. If you’re pinning on a number in New England you better be ready for rain, roots, ruts and mud. And, you better have a set of Donnelly BOS tubulars in your quiver. This tire is even more aggressive than our mud-proven PDX. It features buttressed side-knobs for outstanding traction in super muddy corners and off-cambers, and a center tread pattern that is all bite when it comes down to a tractor pull. Size: - 700 x 33mm Weight: - 386 grams Type: - Tubular Part #: - D50030 Product Features: - Buttressed side-knobs for superior cornering traction. - Unique center knob pattern designed for maximum traction when you need it most. - Soft rubber compound provides extra grip and shock absorption. - Tubeless design means an airtight casing with no inner tube to puncture. - Rubber-coated sidewalls are extremely durable and prevent deterioration from water, mud and dirt. - No additional sidewall coating necessary. - All in one construction means tread will not peel away from the tubular casing. - Precision design creates a straight tire with no variances in size or alignment. - The tire and base tape are consistently straight making it easy to glue and install to your wheel. - A removable valve core allows for valve extenders installation as well as insertion of tire sealant. - Liquid sealant can be used with all Donnelly tubulars to prevent or repair typical punctures.

- Basic replacement grade tire suited for urban riding as well as some off-road - 20 x 2.125

MICHELIN's Dynamic Sport offers an excellent ride, high mileage and even puncture protection at a nice price. With its grippy tread, tough nylon casing and supple sidewalls, you'll enjoy all your road rides even more.

Indoor-training has never been so technical! Featuring our special compound and tread pattern and our strongest casing, this tire is designed expressly to disperse heat and reduce noise generated by home trainers. Keep your race tires clean and safe for race day, and spend your indoor-training miles on the Zaffiro Pro Home Trainer.

- Material: Cloth - Size: Wide - Rim Strip Width (mm): 16 - Adhesive: Yes

- Material: Cloth - Wheel Size: All - Width: 10 - Rim Strip Width (mm): 10 - Adhesive: Yes

The Fast Trak Sport has become synonymous with fast and lightweight tires that are able to handle the most technical courses and the most grueling conditions. This model redefines what was thought possible with a cross-country tread design.

- Cotton - Adhesive backing - Size: Semi-Wide - Width: 19mm - Brand: Velox - Light fabric protects tube from spoke or nipple puncture

- Smooth, fast rolling tread with water evacuating grooves and raised, textured shoulder blocks - Provides unrivaled grip in wet road conditions - Alternating, slightly raised shoulders grip well even over loose debris - Reflective sidewall striping keeps you seen and safe on your early morning or late night commute - Magnitude III level puncture protection - a 60x60 TPI Nylon layer beneath the tread surface - Style: Standard - Size: 29" x 2.0 - ISO: 622 - Bead: Wire - Belted: Nylon 60 - PSI: 65 - Weight: 705 - TPI: 60 - Reflective Sidewall: Yes

Do endless miles of dirt road call to you? Are you looking for a boost to your speed in the next gravel grinder? Or, maybe you are planning a cross-country trek and want the quickest and most durable tire possible; look no further than the Alluvium Pro. The Kenda Alluvium Pro is an all-new gravel and adventure tire that is as capable on pavement as it is on hard-conditions singletrack. Featuring a tread design optimized for speed, with low profile knobs to aid in reducing rolling resistance combined with a new single tread rubber compound, the Alluvium offers both speed and grip. The GCT casing wraps the tire from bead to bead with a secondary casing layer acting as a shield against punctures and sidewall slashes. Seating the tubeless bead is made even easier with the GCT casing. A reflective hot patch on the tire adds visibility in low-light situations.

The E-Wild features a new generation of top-of-the-range compounds that give better rolling strength and increased efficiency, for more miles of riding. - More grip: Optimal grip with its lateral and central compounds designed to optimize motricity, even on climbs, and transmit the bike's full power - Extra protection: Based on its Pinch Protection technology, which absorbs the energy from pinch flats and its Gravity Shield casing from the Enduro competition range - Same tread design for both Front & Rear, but the rear-specific tire is reinforced for added puncture protection, making it heavier but more robust

Born in the hills of Kansas, the Flintridge takes its name from the local sharp, jagged rocks. With a smooth centerline tread pattern that is equally at home on pavement and hard pack, the Flintridge shifts from the fast-rolling center to the grippy transition and shoulder knobs for control in loose rock and mud. The GCT casing does double duty, reinforcing the sidewalls of the tire with a woven shield to prevent slashes and abrasions while optimizing the casing for fast and easy tubeless conversion. - A gravel-crushing tire to rule them all - Offered in a gravel-specific GCT casing for tread and sidewall puncture and slash protection - Reflective Hot Patch on the tire adds visibility in low light situations

Park/street tire, with directionally grooved tacky tread. - ISO: 355 - Bead: Wire

The second generation of the legendary High Roller - Easily clears debris - Open tread design - Wide trail (WT) casing specs are optimized for 30-35mm inner width rims An open and aggressive tread design gives the High Roller II excellent soil penetration and mud-clearing ability. A square profile provides a solid, consistent feel across the knobs. Modified knobs on the shoulder and center improve braking performance and traction on hard surfaces. An excellent choice for technical, loose terrain.

Ranger is designed to be a set-it-and-forget-it tire. Tightly spaced center knobs set the pace, while open outer lugs devour corners and shed muck with ease, making the Ranger equal parts trail ace and XC dominator. Completing the package, multi-directional siping ensures the Ranger grabs hold, whether tackling technical climbs or flying into corners. The lean profile of the Ranger 2.0/2.25 provides optimal efficiency for XC racing, while the high-volume, openly-spaced Ranger 2.40 was created with trail riding in mind. Ranger outperforms in all conditions, without compromising along the way. - Multidirectional siping provides increased traction whether accelerating, braking, or cornering - Well-spaced lugs clear out quickly in wet conditions - Lightweight, rounded casing conserves energy and feels quick to respond

- The same tubeless valves, now with a Tire Insert air flow system - 6 slots machined into the base of the valve stem allow air to flow freely around tubeless tire inserts - Upgraded to aircraft grade 7075 aluminum valve stem and cap - 4mm machined Allen Key slot for easy installation/removal - Valve core removal tool integrated into valve cap - Includes multiple rubber bases to optimize fit with multiple rim types

- Makes the perfect economical trekking tire - The Excel has a reflective stripe on the sidewall, keeping you visible at night for city riding - If getting a reliable, high-performance trekking tire at an economical price is what you're after, the Overdrive Excel is the tire for you.

The Air-Liner is a high-quality polymer insert that replaces a portion of the air volume in the tire. This trait, combined with the shape, provides a tunable system that enhances your ride performance. The Air-Liner sidesteps the traditional compromise of stability vs. grip and allows your tires to remain stable, grippy, and controlled, even at low pressures. The Air-Liner is designed using a round cross-section with channels on the top and bottom. The top channel provides room for the tunable air chamber that sits directly beneath the tire tread. Upon impact, the corner edges of the channel flex first. This allows the tread to remain flexible, which increases traction without sacrificing impact resistance. The bottom channel allows for easy fine-tuning of the air chamber and allows for full compatibility of all valve core styles. The round cross-section shape mimics the natural shape of the tire and supports a greater contact area within the sidewalls of the tire casing. Side-to-side tire stability is increased, yet the tread remains soft and grippy. This improves cornering, climbing, and braking performance. - Protection: Both wheel and tire are protected by the Air-Liner insert. By cushioning impacts from within the tire, your expensive rim remains protected while eliminating flats caused by rim-strike impacts. - Control: The Air-Liner insert replaces air volume in the tire. The reduced air volume allows the tire to compress and rebound in a more controlled manner compared to standard tubeless systems. - Performance: Side-to-side tire stability is increased, yet the tread remains soft and grippy. This improves cornering, climbing, and braking performance. - Durability: This highly durable polymer material has been tested to a projected life of 2000 hours under normal riding, or 1 full hour of run-flat downhill use under a typical rider. - Air-Liner increases control, durability, performance, and protection of both tire and wheel. - Sold individually (single tire). Compatibility - Small: 1.9 – 2.25-inch wide tires - Medium: 2.25 – 2.5-inch wide tires - Large: 2.5 – 2.7-inch wide tires - X-Large: 2.7 – 4.0-inch wide tires

Martello hammers home the performance you expect, on the most demanding Enduro and DH courses. Looking for the one tire to tackle a wide range of courses? The Martello features a World Championship proven TNT bead, add the proprietary 4C Graphene compound, topped off with a moto-inspired tread design and progressive width siping. This last part is key, and provides for a progressive feel on the effective edge, allowing for that fine-touch tactile feel that top racers expect. This design provides for a progressive feel on the effective edge, allowing for that fine-touch tactile feel that riders expect. Whether shredding rocks, roots, or mixed terrain, Martello delivers.

The wire bead version of the new Zaffiro tread offers many of the same traits that established the Zaffiro family as the standard in performance training but at an entry-level price point. Employing the same tread profile as the Zaffiro Pro, the durable, rigid-bead Zaffiro is the top choice for replacement tires at a great price. - Extremely durable tires for performance training - Modern tread design for long-lasting durability

The Eddy Current's solid appearance comes from stable tread blocks, more rubber, and big widths. It allows uncompromising riding, even uphill, and holds up to fierce acceleration as well as technical riding on the trails. The aggressive tread arrangement, open design, and concise V-Grooves in the center and side blocks offer direct, precise steering characteristics and perfect transmission of power to the ground, all with extreme durability. - Tread blocks are up to 20% more massive than other Enduro/All Mountain profiles

The Wild AM2 Competition tire features more grip for mixed and soft terrain. - Wild AM² tread pattern combined with Gum-X technology delivers maximum grip when cornering and excellent braking performance - Light and robust Gravity Shield casing

A classic MTB tire with large, widely spaced knobs suitable for all conditions. - ISO: 406 - Bead: Wire - PSI: 65

The second generation of the legendary High Roller - Easily clears debris - Open tread design - Wide trail (WT) casing specs are optimized for 30-35mm inner width rims An open and aggressive tread design gives the High Roller II excellent soil penetration and mud-clearing ability. A square profile provides a solid, consistent feel across the knobs. Modified knobs on the shoulder and center improve braking performance and traction on hard surfaces. An excellent choice for technical, loose terrain.

Our most durable road offering - Diamond knurled slick design - MaxxShield for maximum puncture resistance - Training tire Our most popular training tire, providing excellent traction, durability, and plenty of road miles in any condition. Maxx Shield helps provide a tire that Re-Fuses to puncture.

A versatile mid-spike for deep loam or loose powder - High-volume casing - Mid-spike tread design Our pro athletes needed a mid-spike tire that could handle dry, loose, blown-out corners as well as a bit of mud. The Shorty is that tire. A high-volume casing makes the Shorty a more versatile option than a dedicated mud spike like our Wet Scream. Large, tall, and slightly staggered side knobs penetrate loose soil to provide predictable, stable cornering at warp speeds.

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.

- A classic road tire featuring the traditional chevron tread pattern - The LGG provides a supple ride, durable yet lightweight construction, and puncture-protection belt under the tread - 120 TPI version is dual compound tread: 70a in center, softer 60a on sides. 60 TPI is single compound tread 70a

The Strada is Challenge's go to tire for long days on the road. This all-condition tire combines a round profile that takes the sting out of rough pavement with a construction that provides maximum control and low rolling resistance. This handmade clincher combines a supple, 300TPI SuperPoly casing with natural rubber tread for long distance comfort, confident cornering, and quick handing. This tire includes PPS Ganzo, a lightweight and supple Puncture Protection System placed between the tread and casing to increase resistance to punctures.

- Low Lead Valve - ISO Diameter: 457 - ISO Width (mm): 44mm - Labeled Size: 22 x 1.75 - Tube Compound: Butyl - Valve: Standard Schrader - Valve Core: Removable - Valve Shaft: Smooth - Weight: 145g

- ISO Diameter: 507 / 24" BMX - Tube Compound: Butyl - Wall Thickness: 0.9mm - Valve: Standard Schrader - Shaft Type: Smooth - Valve Core: Removable

- ISO Diameter: 584 / 650b / 27.5" - ISO Width: 52mm, 53mm, 54mm, 55mm, 56mm, 57mm, 58mm - Labeled Size: 27.5 x 52/58 - Tube Compound: Butyl - Valve: Presta - Valve Core: Removable - Valve Shaft: Threaded

- ISO Diameter: 305 / 16" BMX - Tube Compound: Butyl - Valve: Presta - Valve Core: Removable - Valve Length: Short 32-40mm - Valve Shaft: Threaded - Weight: 76g (1.25-1.5), 88g (1.5-1.75)

- Labeled Size: 24 x 1 - ISO Diameter: 540 / Wheelchair - ISO Width: 23mm, 24mm, 25mm - Tube Compound: Butyl - Wall Thickness: 0.9mm - Valve: Presta Short 32-40mm - Shaft Type: Threaded - Valve Core: Removable - Weight: 83g

- Size: 24 x 1-1/8 - ISO Diameter: 520 / 24" mini bmx - ISO Width (mm): 29mm - Tube Compound: Butyl - Valve: Presta - Valve Core: Removable - Valve Length: Short 32-40mm - Valve Shaft: Threaded - Weight: 92g

- Size: 26 x 1.0 – 1.25 - ISO Diameter: 559 / 26" mtn - ISO Width: 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm - Tube Compound: Butyl - Valve: Presta - Valve Core: Removable - Valve Shaft: Threaded - Weight: 96g

- Size: 26 x 1.9 – 2.125 - ISO Diameter: 559 / 26" mtn - ISO Width: 48mm, 49mm, 50mm, 51mm, 52mm, 53mm, 54mm - Tube Compound: Butyl - Valve: Presta - Valve Core: Removable - Valve Shaft: Threaded - Weight: 170g (32mm), 171g (48mm)

- Size: 700c x 40 – 45 - ISO Diameter: 622 / road / 29" - ISO Width: 40mm, 41mm, 42mm, 43mm, 45mm - Tube Compound: Butyl - Valve: Presta - Valve Core: Removable - Valve Shaft: Threaded - Weight: 188g (32mm), 189g (48mm)

- ISO Diameter: 622 / Road / 29" - Tube Compound: Butyl - Wall Thickness: 0.9mm - Valve: Presta - Shaft Type: Threaded - Valve Core: Removable

The Race Slick is a tire that transcends its name by providing exceptional ride quality. Race worthy, but weekend warrior ready, the Ritchey Race slick is a clear choice for any road build. - Folding Aramid bead - 60A Durometer rubber - 120TPI

Ritchey's signature mountain bike tread pattern for well over a decade, the Z-Max Evolution is the culmination of years of development and VFA design. Tread lugs are spaced wider and shortened for faster handling, reduced rolling resistance, and lighter weight. WCS version features dual compound and is tubeless-ready—softer sides enhance cornering while the firmer center section rolls faster and is more durable. - Tubeless Ready (WCS) - Weight: 586g (27.5 x 2.1") / 710g (27.5 x 2.25")

- The original tube for flat protection - Non-toxic and environmentally safe - Protects against punctures up to 1/8-inch

A high-performance road tire exhibiting great grip, puncture resistance, and aerodynamics at a competitive weight - Anti-flat belt protection improves puncture and side-cut resistance - Aerodynamic sidewall 'fins' fills the gap between the tire and the rim

Tubeless valves for DT Swiss rims for repair or replacement. - DT Swiss Narrow Base Tubeless Valve - 32mm

Schwalbe tubes retain air pressure considerably longer than standard tubes. The quality and purity of the rubber mixture directly affects the quality of the tube.

Give your mountain bike road speed with Ritchey's Tom Slick 26-inch. It's a worthy all-around training tire that features a slick center for minimal rolling resistance and grooved shoulders to shed water and debris. - Level: Comp Wire - VFA Directional Tread

Specialized's S-Works Turbo Tubular Allround 2 is the tire of choice for many professional riders due to its enhanced performance traits over current offerings. It features an extremely low level of rolling resistance, superior cornering traction, and astounding grip through various course conditions. In other words, it's the tire that's purpose-built to help riders get to the finish line first. - Casing: 290 TPI - Latex Inner Tube - Compound: Gripton - Flat Protection: BlackBelt

- Hardpack mountain bike tire designed to run in specific directions for the front and rear - In front, the Camber rolls fast, confidently grabbing corners even in the loose stuff - Reversed on the rear, the Camber gives you the same confidence in the corners, plus additional acceleration and climbing traction - Folding bead option also provides lightweight EPS puncture protection layer for outstanding performance and durability

Schwalbe's Century Performance Line tire is a true classic. It is perfect for trendy bikes with a vintage look, since the profile and contour are based on tires from the early 20th century. The side label keeps the classy aesthetic going, by using the traditional billboard technique with raised lettering.

Tom Dugan's signature Dugan tire features a fast center tread for park, street and dirt. - Dual ply casing

The Jake Seeley signature Street Sweeper tire features a directional, dual compound construction. - Center tread features softer durometer - Side tread features a harder durometer to withstand grinds

These oversized Presta valve nuts are specifically designed to provide extra clearance and extra leverage to better tighten tubeless valves. They're especially helpful on single-wall rims. -Concave to allow better engagement of the valve/rim interface -Oversize to provide extra torque when tightening -Especially helpful on single-wall rim tubeless setups -CNC-machined AL-6061

- Fast rolling yet grippy center line with robust corner tread for grip on all surfaces - Kelvar belting helps prevent flats - Reflective sidewall striping - Bead: Wire

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. Exposure tires are available in 30, 32 and 34mm for the ultimate versatility in road tires...meaning big days and few boundaries. Usage: Endurance Road / Mixed Terrain / Gravel Race Conditions: Pavement / Light Gravel Compound: Distance+ Casing: Supple - 700 x 30c: 310g - 700 x 32c: 315g - 700 x 34c: 370g

Put the Smoke on your rear wheel and feel the 3D knobs dig in going up or down for legendary grip. The Gold Standard of MTB tire design. - Rear tire with 3D multi-angle knobs designed for cornering traction - 3D Knobs; positioned on the tire sides these knobs perform multi-directionally to maintain traction while cornering - ETRO: 50-559

T-Serv ProTite is a great performance tire for urban city use, incorporating ZSG compound, 400D Lite Extra Cord, and ProTite puncture-resistant technologies. Hands down, T-Serv is the best urban strength-to-weight-ratio tire on the market today. Need to get through your urban jungle quickly and reliably? T-Serv is the answer. - Urban/Commuter tire - Aramid (Kevlar) folding bead - Max PSI: 90

A great value that brings many high-end features into an all-around tire at a great price point. Light enough to race on and durable enough for daily use. Because of the puncture-resistant belt under the tread, the Closer Plus offers a high level of balance between weight and puncture protection. - Road training/racing tire with All-Contact Tread shape and puncture protection belt - Long lasting, all-conditions Zero Slip Grip natural rubber with silica - Supple 400D Lite Extra Cord casing

- Perfect for urban duty mountain bikes or 650b touring bikes - Fast enough for paved roads and strong enough for gravel - Folding Aramid bead

Special assembly liquid for bicycle tires. A practical sponge applicator allows the liquid to be applied to the tire bead very simply - without smudging fingers. When inflating, the tire bead slides easily into the correct position on the rim. The liquid evaporates completely after about 10 minutes!