What size ISIS BB do I need?
Hi Mechanistas, and apologies for what feels like a fairly basic question.
Would appreciate guidance on how to identify the BB size required for my frame.
I have a never-built Look KG111 frame, for which I'm gathering bits. I would like to use a set of compact FSA Gossamer ISIS cranks and Centaur for the rest of the drive train, and wondered what size ISIS bottom bracket I'll need. I know I it needs to be English threaded, but they come in various sizes - 108 mm, 113 mm, etc.
Any advice welcome!
Regards from sunny, dry and windy Melbourne,
me have long head tube
ISIS was supposed to standardize bottom-bracket lengths, so if you're using a double crankset (I assume you mean a compact double) for proper chainline with a road (130mm-spaced) rear hub, you'll want 108mm. 113mm is for road triple (or mtb double if anyone wants to do it) and 118mm is for mtb triple.
Confirmed my initial thoughts. Much appreciated.