Thanks to the combination of SHIMANO's new Di2 platform and the road incarnation of HYPERGLIDE+, the ULTEGRA R8150 derailleur moves between chainrings with the fastest and smoothest action on the market.
- Faster than ever chainring shifting, 45% faster than FD-R9150
- Smaller, more aerodynamic, lighter
- Frontal area reduced by 33%
- Weight reduced to 116 g
- Maximum chainring teeth: 50-52T