Shimano SM-RT66 Disc Rotor - 180mm | 6-Bolt Clincher Tire designed to fill the aerodynamic

designed to fill the aerodynamic dead zone that standard bottle cages leave open between the downtube and the bottle

and rear sections

Compatible with all PNW dropper posts including the Cascade

while the durable reinforced base panel stands up to years of daily use

The no-nut version is a clean

Shimano SM-RT66 Disc Rotor - 180mm | 6-Bolt Clincher Tire designed to fill the aerodynamicWhat is the Shimano SM RT66 180mm rotor built for? The Shimano SM RT66 Disc Rotor 180mm 6 Bolt is built to deliver consistent, dependable stopping power across SLX and Deore level brake setups in all riding conditions. It uses a one piece stainless steel construction that resists corrosion and holds up to hard, repeated braking, and it ships with Shimano's anti loosen tightening plate so the rotor bolts stay put and installation is quick and secure.