Shimano Ultegra FD-R8150 Di2 12 Speed Front Derailleur gsda For bikes running a 1x

For bikes running a 1x Drivetrain with out a front derailleur this blanking plate mounts in place of the bolt on derailleur mount for a more refined look

it will no longer be as effective

PF30 bottom bracket with outboard bearings for use with 30mm spindle cranksets

Compatible with Combo Mounts – please use hardware included with insert

Shimano Ultegra FD-R8150 Di2 12 Speed Front Derailleur gsda For bikes running a 1xMore compact and faster than ever, the Shimano Ultegra FD R8150 Di2 12 Speed Front Derailleur performs digitally precise front shifts in any circumstance. Combining Shimano's Di2 platform with the road incarnation of Hyperglide+, it shifts between chainrings with Shimano's fastest, most seamless action. Specifications Fastest ever front shifting 45% faster than FD R9150 Smaller, sleeker, lighter Frontal area reduced by 33% Weight cut to 116g Top gear