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Bottom bracket and crankset selection

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Bottom bracket and crankset selection

Old 02-19-18, 01:32 AM
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Bottom bracket and crankset selection

I have a BB86 bottom bracketed frame, and I need to purchase a bottom bracket and crankset.
Can I mix and match any BB86 bottom bracket, with any 24mm external-axis-diameter crank?

What parameters do I need to look for in matching the bottom bracket with the crankset?

So far I've made these notes regarding BB86 and other standards:
- bottom bracket shell diameter 41mm
- bottom bracket shell width 86.5mm
- crank compatibility: standard 24mm external type and BB386 Evo
- 5 catch
- bcd 130mm standard
- 43.5mm chainline is standard (spindle length depends on 5 catch position of crank)
- chainset must match chain and cassette number of sprockets
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Old 02-19-18, 02:33 AM
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BB86 is not BB386EVO, but you can use 386 30mm cranks with a special 41mm to 30mm adapter.

You need a GXP BB86 BB for GXP cranks, and a 24mm for Shimano or FSA 24mm.

If I were you, I'd consider some specific cranks, then do a search for the crank type and "BB86", like "GXP in BB86".

The cranks that won't work are anything designed to be narrow, like real BB30 or English BBs. Those cranks require a BB shell that is no wider than 68mm, and BB86 is 86mm.
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