Rotor Round Chainring 55T Bcd144X5 1/8" Black bicycle pump a technical adaptation of Bernoulli’s

a technical adaptation of Bernoulli’s principle is applied to HJC’s aerodynamically enhanced models

Carrier: RBKF Mini

6 mm steel backplate ensures light weight and stiffness

auto display the last mode when the next time you turn on

Sleek compact form factor easily fits in jersey pockets and bags for on the go convenience

Rotor Round Chainring 55T Bcd144X5 1/8" Black bicycle pump a technical adaptation of Bernoulli’sFeatures High performance round chainring built for track and fixed gear setups. Precision machined BCD 144x5 for a perfect chainline. 1 8" thickness suitable for single speed chains. Sturdy and lightweight with a black anodized surface. Specifications Teeth: 55T BCD: 144x5 Chain Width: 1 8" Color: Black