Challenge Gravel Grinder gravel tyres: tubular, tubeless and clincher

Challenge Folding Tyre Gravel Grinder Race Clincher, 38 x 700C, 120 TPI, colour: black, image for illustration purposes only

Challenge Gravel Grinder Race Clincher, 42 x 700C, 120 TPI, colour: black

Bicycle tyre, Challenge Gravel Grinder Race, 42 x 700C, 120 TPI, colour: black-brown