Combining the new SHIMANO Di2 platform with the road incarnation of HYPERGLIDE , the ULTEGRA R8150 derailleur shifts between chainrings with the fastest and smoothest action on the market.
- Faster than ever chainring, 45% faster than FD-R9150.
- Smaller, more aerodynamic, lighter.
- Frontal area reduced by 33%.
- Weight reduced to 116 g.
- Maximum crown teeth: 50-54D.
