RML System GRX Di2 People have been gushing about

People have been gushing about the ISM Attack since its introduction in 2013

Steel lockring

After three years of development working with the fastest racers at the World Tour level

WIDTH : 175mm

RML System GRX Di2 People have been gushing aboutThe rear mount for nearly every metal railed saddle. New, dual position saddle rail mount fits tri saddles that often have trouble finding their rear hydration match. Dual Position Adjustability: Dual position saddle rail mount to dial in the ideal angle. Designed to mount 1 or 2 water bottle cages. Fits Like a Glove: For nearly every saddle. Specially designed to fit tri saddles that often have trouble finding their rear hydration match.