The Gravel Grinder is our original and often-imitated fast gravel design. It combines a speedy diamond center for low rolling resistance with aggressive shoulder knobs that reliably hook-up when the terrain gets soft, muddy or a bit sketchy. 

With our RACE series, we start where other tires stop - we utilize ultralight 60TPI nylon casings and superior tread compounds - to give our traditional vulcanized tires excellent ride feel and quality that is more affordable than our handmade offerings.

This Challenge TLR model is hooked rim compatible.

CONSTRUCTION: Vulcanized
Challenge vulcanized tires take full advantage of our construction know-how and awesome tread designs – It's tough to beat the durability, good performance and low cost of vulcanized construction. We work with proven factories to bring iconic Challenge models to more riders.

SERIES: RACE (Vulcanized)
Value and Performance – It's tough to beat the durability, good performance and low cost of vulcanized construction. Our RACE series brings iconic Challenge tread patterns and compounds to more riders.

CASING: Nylon Superlight 60TPI
Vulcanized Nylon tire casings are the industry standard. Easy to produce and offering excellent durability and high performance at a moderate cost, they are the most common variety of tire available.

COMPOUND: SMART-V
A specially formulated version of our SMART compound that is adapted to the different construction of vulcanized tires.

PUNCTURE PROTECTION: PPS
Our Puncture Protection System (PPS) is a tough, tightly-woven fabric placed between the tread and casing to increase puncture resistance.