Hollowgram BB30 cranks on Enduro BSA XD15set up.

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durianrider
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Joined: Wed Jun 02, 2010 7:00 am

by durianrider

Looks like a light combo and Enduro today confirmed it will work with old BSA style bikes.

Who has taken advantage of this combo?

Hollowgram cranks. (Add 17g if you want a power meter attached)
Enduro XD15 BKC O6O5

Im thinking of putting it on my BSA CAAD9.
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shlammed
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by shlammed

Have you seen an actual picture of the product? im having a hard time picturing it because a bb30/pf30 crank spindle is quite a bit shorter for outboard bearings to work and I would assume you would need to go outboard to have a 30mm spindle work in a bsa threaded shell.

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LeDuke
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by LeDuke

You just use the RaceFace 68/73mm spindle.

Plenty of people doing this on MTBs.

shlammed
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by shlammed

LeDuke wrote:You just use the RaceFace 68/73mm spindle.

Plenty of people doing this on MTBs.

68/73 spindle and a 30mm bsa Bottom bracket?

Basically making this the BB386 crankset?

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LeDuke
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by LeDuke

See the specs here:

http://raceface.com/components/cranks/next/next-sl/

Note the BB compatibility.

Also, the spindle is compatible with Hollowgrams; same interface, just longer and without a shoulder on it.

http://raceface.com/components/parts/ci ... indle-kit/

durianrider
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by durianrider

Would I need a mountain bike spindle to fit BB30 Hollowgram to a CAAD9 BSA?

I emailed Cannondale Australia and Cannondale USA and they admitted they didnt know the answer.
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dudemanppl
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by dudemanppl

This has been mentioned before. I also thought I was a genius until I looked in to it and the Q-factor and chain line would be COMPLETELY off.

mrlobber
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by mrlobber

How much should this be repeated again and again?
True BB30 crank (which Hollowgram happens to be) cannot be mounted on a BSA BB frame without serious modifications which would make the usage non-optimal, to say the least (such as chainline issues and others).
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ms6073
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by ms6073

Once more for clarity - it will not work! :unbelievable:
So until someone introduces BSA 386 adapters :mrgreen:, for those who are still not convinced, the only modification that will possibly afford near optimal results requires removal/machining ~6.5mm of material from each face of the bottom bracket shell. So while that is probably attainable for alloy frames, maybe not so much for a Ti frame, and simply a none starter when discussing a carbon frame that wraps a billet aluminum bottom bracket insert.
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shlammed
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by shlammed

dudemanppl wrote:This has been mentioned before. I also thought I was a genius until I looked in to it and the Q-factor and chain line would be COMPLETELY off.

would chain line not be the same if your bike was using 135mm rear spacing like a mtb, assuming you have the mtb spindle?

or does the mtb spider have a different offset?

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