allowing for that fine-touch tactile feel that top racers expect

Will not harm carbon fiber

This combination of performance is ideal for the Trail category

DUB™ bottom bracket adds durability and simplicity

simplifying crankarm compatibility

SHIMANO Ultegra Di2 R8150 Front Derailleur - 12-Speed - Braze-On Compatio_enriched allowing for that fine-touch tactileMore compact and faster than ever, the ULTEGRA R8150 front derailleur performs digitally precise front shifts under any circumstances. Combining Shimano's new Di2 platform and the road incarnation of HYPERGLIDE+, the ULTEGRA R8150 front derailleur shifts between chainrings with our fastest, most seamless action. Shimano's fastest ever front shifting, 45% faster than FD R9150 Smaller, sleeker, lighter Frontal area reduced by 33% Weight cut to 116 g Top