Shimano Cranks for BB86 Frame

Discuss light weight issues concerning road bikes & parts.
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libresse
Posts: 11
Joined: Fri Jun 03, 2016 4:18 pm

by libresse

Hi,

I'm fairly new to cycling so pardon the noobish question.

I have a Scott Foil with a bb86 bottom bracket with a SRAM gxp crankset installed in it. I'm planning to switch to Shimano cranks. Does shimano have a gxp type crankset or they just have 1 type of crankset but needs the right bb?

Thank you

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FIJIGabe
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by FIJIGabe

All you need to do is replace the non-drive side bearing with a standard 24mm bearing and you can run any Shimano crank.

GXP runs a 24mm inner diameter drive side bearing with a 22mm inner non-drive side bearing.
Shimano runs a 24mm inner diameter drive side bearing with a 24mm inner non-drive side bearing.
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by Weenie


jfranci3
Posts: 649
Joined: Tue Jul 26, 2016 5:21 pm

by jfranci3

bb86 is Shimano. Look on the non-drive side of your GXP Bottom Bracket, does the it have a bearing with a 22mm hole or does it have a 24mm hole with a 1mm thick removable ring? If it has that 2mm adapter ring, you don't need a new bottom bracket, you just don't use the ring.

What a Shimano-GXP spacer ring looks like - https://www.ebay.com/p/Bottom-Bracket-C ... 097&chn=ps

libresse
Posts: 11
Joined: Fri Jun 03, 2016 4:18 pm

by libresse

Thanks! So basically there's only 1 type of shimano cranks? unlike in sram theres a gxp and bb30 version.

jfranci3
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Joined: Tue Jul 26, 2016 5:21 pm

by jfranci3

Xxx
Last edited by jfranci3 on Fri Feb 22, 2019 4:29 pm, edited 1 time in total.

jfranci3
Posts: 649
Joined: Tue Jul 26, 2016 5:21 pm

by jfranci3

Generally, most modern Shimano road cranks are the same size (24mm) . I believe they also make a 30mm version, but that would be far less common. The 30mm sizes are the counterpoint to Shimanos 24mm size. GXP is a workaround to use Shimanos standard by putting a spacer on one of the bearings.

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onemanpeloton
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Location: Edinburgh, UK

by onemanpeloton

I bought a rotor 24mm bottom bracket so that I could use shimano cranks on my giant tcx with BB86
2017 Giant TCR Disc
2015 Giant TCX
2016 Cube Stereo 140

libresse
Posts: 11
Joined: Fri Jun 03, 2016 4:18 pm

by libresse

Thank you all. You've all been a big help

by Weenie


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