Shimano Ultegra Rear Mech Pulley Set RD-R8150 Helmets It offers an aerodynamic design

It offers an aerodynamic design and engineered lens ventilation

The dynamic Aethon builds on the success of the popular Alliant model

Access to new roads and experiences is easily within reach thanks to the 150 km to 200 km* furthest range of the reliable EnergyPak battery

Available in a left and right model

Shimano Ultegra Rear Mech Pulley Set RD-R8150 Helmets It offers an aerodynamic designDescription Ultegra rear derailleur replacement guide and tension pulley set Suitable for Ultegra RD R8150 Its recommended that you replace your derailleur pulley wheels periodically for the best shifting performance Set comprises of two pulley wheels and is a genuine Shimano replacement part Product Type Pulley Sets Discipline Road Colour Black Size One size