Shimano Ultegra RD-R8150 Di2 12 Speed Rear Derailleur gsforcee1 These aero rings were built

These aero rings were built as a solution for the people who want the quality of ROTOR chainrings but aren't ready to change their whole groupset from a stock AXS setup

Fabric: The double-knitted interlock fabric has a 4-way stretch

This means the well-known advantages of stiffness

Spoke wrench: 3

The drops are angled 4° degrees

Shimano Ultegra RD-R8150 Di2 12 Speed Rear Derailleur gsforcee1 These aero rings were builtNow simplified with a single derailleur cage length, the Shimano Ultegra RD R8150 Di2 12 Speed Rear Derailleur packs Shimano's fastest, most precise shifting into a more approachable option. The single cage length is compatible with up to 34T low sprockets, making it more versatile than ever. Specifications Fastest ever rear shifting 58% faster than RD R9150 Compact design includes an integrated wireless unit, charger and switch LED status indicator