Make your mark on the gravel scene with the Gravel Grinder. This tire combines a fast rolling diamond center with aggressive shoulder knobs that only hook-up when the terrain gets soft, muddy, or a bit sketchy.
For a perfect tubeless setup use Challenge Smart Sealant !
Warning
- Tubeless Ready (marked TLR) tires can be mounted with or without inner tubes. TLR tires are designed to be used tubeless only with a sealant and are optimal designed for hooked type rim and not hookless.
- Challenge tires should not be mounted on wheels that do not meet ETRTO or ISO standards. Not compliant wheels may cut the tire casing above the bead resulting in a tire failure and possible serious injury of the rider.
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