SHIMANO DURA ACE BB-R9100 ITA HOLLOWTECH II BOTTOM BRACKET over-2500 Tuned Compliance: Dropped seatstays with

Tuned Compliance: Dropped seatstays with thin tubing absorb road shocks and vibrations

Integrated Mips Evolve Core™ technology with better rotational impact protection

dual colour front fender that attaches to the fork with hook and loop straps easily and securely

USB Rechargeable: Convenient USB charging (Micro-USB) ensures quick and eco-friendly recharging

SHIMANO DURA ACE BB-R9100 ITA HOLLOWTECH II BOTTOM BRACKET over-2500 Tuned Compliance: Dropped seatstays withThe SHIMANO BB R9100 DURA ACE HOLLOWTECH II bottom bracket delivers precision engineering for the FC R9100 crankset. Featuring M36 x 24T Italian thread cups, this component combines lightweight construction with exceptional stiffness for competitive performance. The HollowTech II design ensures smooth, efficient power transfer with minimal friction. Compatible with frames using Italian threaded bottom bracket shells. Requires TLFC34 or TLFC24 tool