Shimano GRX is designed specifically for rough rides Ð you get great chain retention and a better grip on the hoods and levers;This bike was designed with input from cyclocross royalty, including World Champion Sven Nys and US National Champ Katie Compton;The combination of Front and Rear IsoSpeed cuts down on the fatiguing impacts of rough courses and increases compliance, giving you more traction when it matters;Boone's cross-specific geometry and tube shapes make shouldering easy, so you can dominate all
