DUB™ bottom bracket adds durability and simplicity

such as their dual mode or BLE only cycling power meters

Made from 7075-T6 aluminum for long life

5 degrees angle for easy and fast entry

For amateur racing and training Designed for intensive training

SHIMANO Ultegra Di2 R8150 Front Derailleur - 12-Speed - Braze-On Compatio_enriched DUB™ bottom bracket adds durabilityMore 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