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What are my crankset options?

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What are my crankset options?

Old 01-12-21, 05:10 AM
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What are my crankset options?

I have an 2017 Specialized S-works Tarmac SL5 frame with Oversized Bottom Bracket (OSBB). I'm wondering what are my crankset options? I couldn't find this information anywhere. I know one option is to use S-works brand crankset. I ready have Shimano mechanical 105 11sp group set. I'm wondering if the 105 crankset will work with my works frame.
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Old 01-12-21, 08:54 AM
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Pretty sure this variant of the Specialized OSBB is just a BB30 with a different name. If what I'm seeing on Google is true, any BB30 crankset would fit.

There are ways to run a Shimano crankset (24mm) in a BB30 shell (designed for 30mm). https://wheelsmfg.com/bb30-adapter-f...0your%20cranks

I've never used this product, but it seems to work: https://www.velonews.com/gear/review...bb30-adapters/

This is a fairly specific question that might get better results and more discussion if posted in the mechanics forum.
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Old 01-12-21, 09:19 AM
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You first have to determine what version of OSBB you have. They made one that was 61mm wide with plastic cups and another that was just BB30 with a different name. After that, you just need to find a bottom bracket that is compatible with whatever crankset you want to use. There are several manufacturers of bottom brackets to adapt most cranksets to either of the pressfit OSBB "standards".
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Old 01-12-21, 09:59 AM
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Pretty sure you have a basic BB30 set up with a different name. You can pretty much use any crankset you want, you may just need adapters or new BB to fit your crank to the frame.

The Wheels Mfg adapters linked earlier will work fine, if bearings are already pressed in the frame. If not, consider getting a BB with outboard bearings that will fit that frame.
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