By Dennis M Forsythe, Emeritus Professor of Biology, The Citadel, Charleston, SC
Direccion Pro Superior Is41 28 6 IntegratedDisc brake xtr sm-rt99 180mm ISMRT99M SHIMANO brakes bikeDisc wheel AERON carbon composite compatibile Shimano 10 11 Campagnolo ClincherDireccion Ritchey COMP Lower Cartridge Press Fit 1.5