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.
This handmade PRO version combines a supple Super Polyester casing with our durable SmartPlus Compound.
This Challenge TLR model is hookless rim compatible.
For perfect tubeless setup use Challenge Smart Tubeless Sealant
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