I'm thinking of changing my ultegra cranks over to Rotor, was looking at either the ALDHU or possibly Inpower DM. From my research the ALDHU can come with 24mm axle so I believe this is a straight swap from my ultegra. The inpower DM is 30mm so I would need to change the BB.
Is one axle size better for my frame over another? If I went for the Inpower DM is it just a case of a new BB? any issues with running a 30mm axle on the teammachine?
Many thanks
BMC Teammachine - Rotor Cranks
Moderator: robbosmans
The Teammachine is BB86 and designed for 24mm axles, so if you're using an Ultegra crank now, it would be a straight swap with the 24mm ROTOR one. That said, you can get a niche PF4130 BB that has small bearings to accomodate the larger 30mm axle.. however there are some drawbacks that you have to consider if you go this route:
- the bearings will wear faster
- smaller margin of error with the BB tolerance so don't cheap out if you go PF4130, do your research. A lot of people on this forum, myself included, have found the cheap ROTOR PF4130 pretty crap and creak-city (even using loctite)
- if you have a disc brake Teammachine, there may not be enough room under the axle to route the hydraulic hose for rear caliper -- I would check with your BMC dealer or send BMC and email to make sure. I'm not entirely sure with the Teammachine (as I have the rim brake version), but this is definitely the case with the Roadmachine
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I have the timemachine disc... no issues... running 30mm THM cranks... bearings are not that expensive unless you get ceramic.
2024 BMC TeamMachine R Building
2018 BMC TImeMachine Road
2002 Moots Compact-SL- getting aero look makeover
2019 Parlee Z0XD - "classified"
2023 Pivot E-Vault - completed project, full Xplr package
2018 BMC TImeMachine Road
2002 Moots Compact-SL- getting aero look makeover
2019 Parlee Z0XD - "classified"
2023 Pivot E-Vault - completed project, full Xplr package