Challenge - GRAVEL GRINDER-RACE-V-CL-Black-120tpi-700x38 fast rolling centre for straight

fast rolling centre for straight line control and speed

The Expert model uses Reynolds/Ringlé Super Bubba X Road DB hubs

failed catastrophically with the seat and clamp components

Very low profile clamps means no seat interference as the swivel nuts are down between the seat rails

Challenge - GRAVEL GRINDER-RACE-V-CL-Black-120tpi-700x38 fast rolling centre for straightConsumer Product Safety Bulletin March 13, 2019 Make your mark on the gravel scene with the Gravel Grinder. This tyre combines a fast rolling diamond centre with aggressive shoulder knobs that only hook up when the terrain gets soft, muddy, or a bit sketchy.