Gravine Pro Tubeless Tire

What Our Gearhead® Experts Are Saying:

"The Gravine Pro Tubeless Tire is the tire I spec when the course map shows the kind of loose, rocky, or muddy terrain that a lower-profile tread simply cannot handle at race pace. The increased tread depth and wide-spaced knob layout give it a braking and lateral grip character that holds up in conditions where other gravel tires start to push wide or lose confidence, and the handmade 260TPI Super Polyester casing and SMARTplus compound back up that aggressive tread with the ride quality and durability needed to race on it hard. The PPS2 double-layer protection keeps flats out of the equation on the kind of terrain that makes them most likely."

The Challenge Gravine Pro Tubeless Tire occupies a specific and important position in the gravel tire landscape as the most aggressive tread pattern Challenge produces, engineered for the severe terrain conditions that push versatile all-condition tires beyond their design intent. Where fast-rolling center treads run out of answers on loose gravel, rocky trails, and muddy surfaces, the Gravine's increased tread depth and wide-spaced knob architecture take over, delivering the braking traction, cornering grip, and mud-shedding performance needed to ride and race with confidence when terrain becomes genuinely difficult.

The wide-spaced knob layout is central to the Gravine's performance character on the conditions it was designed for. Generous spacing between knobs prevents mud and loose dirt from packing into the tread and reducing grip, allowing the tire to maintain consistent contact and traction even when surfaces are saturated or heavily loose. Increased tread depth sustains that grip through hard braking and lateral cornering loads that would overwhelm a shallower tread pattern, keeping the tire planted and predictable at the moments when control matters most.

The 260TPI Super Polyester casing delivers Challenge's handmade construction philosophy to a tire built for demanding use, combining the natural water resistance and durability of polyester with the casing suppleness and terrain conformity that Challenge's small-batch assembly process produces. Running tubeless in either 700x40C at 485g or 700x45C at 560g on hookless compatible rims allows lower pressures that maximize casing compliance and traction in the loose and rocky conditions the Gravine was designed to excel in. SMARTplus compound adds the cut resistance and sustained tread edge sharpness needed for aggressive terrain riding across a full season, retaining its softness and performance character because Challenge's handmade process never subjects it to vulcanization heat. PPS2 double-layer puncture protection places two tightly-woven fabric barriers between the tread and casing, providing the enhanced flat resistance that high-risk terrain demands from a race-ready tire. Challenge Smart Tubeless Sealant is recommended for optimal tubeless setup and long-term airtight reliability.