RollerBoys equipped with low friction ceramic bearings for ultra-smooth glide and exceptional durability. Lubricated with special ceramic light oil for extra smoothness. Composite material provided by EMS Swiss, with 40% glass-fiber. Complete set of bushings for different shifting systems included. Ceramic bearings. 11T. Compatible with Shimano 9,10,11,12-speed / Mega Range and Campagnolo 11 speed.
Best Price: £22.96 from Merlin Cycles