Shimano Saint RD-M820 Guide and Tension Pulley Unit Model=OSPW RS Alpha Pulley Wheel System for Shimano Dura-Ace 9250/Ultegra 8150 The epoxy that binds the

The epoxy that binds the fibers to themselves and to the core has a tensile strength about 3X greater than conventional epoxies and is the strongest commercially available

Designed to work with and protect all BMX chains Tooth Count 25 Material Aluminum Color Black Defined Color Black Bore 24mm

Better finger wrap on the hood means less fatigue on long days and Bonus Buttons lets you shift or control ANT+ devices with your thumbs

Looped ends can be fed through each other

Steel barrel adjuster for strength in case of a crash

Shimano Saint RD-M820 Guide and Tension Pulley Unit Model=OSPW RS Alpha Pulley Wheel System for Shimano Dura-Ace 9250/Ultegra 8150 The epoxy that binds theShimano Rear Derailleur Pulley Assemblies