Interchangeable crankset

3lake

Hi,
i have a BSA 68mm road frame and i would like to be able to mount interchangeably two cranks:
1. Raceface Cinch 30mm diameter with 130mm spindle (single)
2. A road crankset (double or triple)

Would it work if i mount the BSA Cinch bottom bracket (68/73mm) and use the 30mm to 24mm FSA reducer cups and a Hollotech II road crankset?

Thank you,
Luis

The Rookie

No, you can't mount the Cinch cranks in a standard threaded frame, full stop.

the reducer cups allow a 24mm crank to be fitted in 30mm bearings not the other way round.

Nick Payne

The Rookie wrote:

No, you can't mount the Cinch cranks in a standard threaded frame, full stop.

Nonsense: https://www.raceface.com/products/details/cinch-bsa30-bb

Steve-XcT

3lake wrote:

Hi,
i have a BSA 68mm road frame and i would like to be able to mount interchangeably two cranks:
1. Raceface Cinch 30mm diameter with 130mm spindle (single)
2. A road crankset (double or triple)

Would it work if i mount the BSA Cinch bottom bracket (68/73mm) and use the 30mm to 24mm FSA reducer cups and a Hollotech II road crankset?

Thank you,
Luis

I'd try and avoid switching out cranks too often... I don't think it does the BB or spindle much good... I don't mean a few times a year but a few times a week I'd say is too often.

Just another option to consider is just changing the chainrings... I do this a lot on the kids XC bike for races just using a HT-II with 104 BCD.. and although both are 1x its a 5 minute job at most and the only part getting damaged are the bolts that are easy to replace. It would be feasible for a 2x but I might then stick a longer cage on (which is more of an issue on 24" wheels than 700c's)

Both of these however might run into chain length issues... (depending on your double tooth difference)

3lake

One idea was to use the BSA Cinch bottom bracket and use the reducers to fit a 24mm road crank.
The issue is what crank's spindle will be long enough?

Another idea woul be to use a BB386EVO bottom bracket and cranks. Then i would have to find some kind of spacers for the longer cinch spindle..
Or am i wrong? Anyone knows the difference in spindle lenght between the Cinch (std 68/73) and a road BB386 spindle?
Thank everybody for the answers
ps. @The Rookie thanks anyway for the answer, I find myself BB and cranks to be complicated and it's easy to make a mistake

Monty Dog

Cinch is just a 30mm spindle crankset and will work with any BSA30 BB - RaceFace BBs are a bit weak, e.g. Wheels Manufacturing has better sealing / bigger bearings. However, the FSA reducer cups are designed for BB30/PF30 which uses a 19mm narrower BB shell whereas there is no gap with the Cinch crankset. A RaceFace Aeffect Cinch crank running in an HT2 BB might cause fewer problems?