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- HollowTech II integrated bottom bracket uses a wider bearing placement and larger axle diameters for increased stiffness and efficiency
- HollowTech II integrated bottom bracket seal design has minimal bearing interface ensuring smooth rolling and increased durability

-Requires Shimano TL-FC25 to Install as the BB is slightly undersized compared to normal Hollow-Tech 2 bottom brackets
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Questions & Answers (8) Q & A
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Questions & Answers (8)
Would this BB work with a Shimano Metrea crankset? Thanks
23 Jan 2023
Thank you for your enquiry. This bottom bracket is compatible with the Metrea chainset & will work fine.
Kind Regards. JP 24/01/23
Does this include the TL FC25 shim/adapter?
06 Sep 2021
Thank you for your enquiry, no sorry it is not included

WD 06/09/21
2018 Specialized Rock Hopper Pro
28 Nov 2020
I'd like to replace the bb. Only details I can find are BC1.37". What would you recommend?
Hi, as we are not a specialized dealer we cannot advise, please contact your local specialized dealer for more info regarding the specific bottom bracket replacement.

JK 30.11.20
BB replacement
07 Sep 2020
Hi I need to replace my B.B. on my Stevens cx bike it’s a SM-BB6700 BC1.37x24 Road. What would you recommend and would it be an English version.
Hello- as its BC 1.37 that is an English threaded hub.
"BC1.37x24 road" replacement BB?
21 Mar 2018
I need to replace my BB on a Scott CR1, the current one is'BC1.37x24 Road'. Will this part be compatible (I have read that Ultegra or Tiagra 68mm BB should work). Thanks
Hi there,

Yes this would be suitable.

Replacement for SM-FC4500?
21 Feb 2018
to be used with FC-R600
Hi there,

Yes this will be a suitable replacement.
Note - it requires the smaller style tool to fit.

Is this a suitable replacement for SM-BB51
31 Jul 2017
Currently have SM-BB51 and having trouble finding the spec for that to pick a compatible replacement.

Bike is a 2013 Dawes SuperGalaxy if that helps.
Hi, if you are trying to upgrade then go for another MTB bottom bracket to match your MTB chainset. Deore XT our part 38588 would be suitable. Thanks.
Replacement For Ultegra Fc6600 Outboard Cup Bb?
13 Jun 2015
My Ultegra bb SM_FC6600 ( english 68mm ) has seized up. What replacement should I get?

As the dimensions haven't changed in any way between the FC-6600 chainset and the FC-6800 chainset in regards to how they fit with the bottom bracket so this one you are looking at is a suitable replacement.