BB30 considerations...

keeweeman · 2017-04-13T12:18:46+01:00

Hi all Looking for some advice with regards to what i now know to be a fairly well documented problem... I have a 2016 cannondale synapse ultegra disc and i suspect that it has already developed a creaky bottom bracket. Some digging has led me to a few bits of information: 1/ It is a common problem with bb30 bottom brackets which i believe mine is [Edit: just realised it is a bb30a, so now unsure as to whether the adaptors will even work anyways...] 2/ there are adaptors available to relocate the bearings to outside the frame in the same vein as a htii bottom bracket setup. The favourites seem to be Rotor and Praxis on this front. So with that in mind i am looking for some information regarding my options really, the cranks on the bike are the cannondale own brand ones that came with it and ideally i would like to keep the costs down as this is more a frustrating issue than anything more sinister. Would the cranks on the bike now be compatible with the above adaptors or would i have to shell out on a set of new cranks as well as the adaptor if i were to go down that route? Any help would be much appreciated! Cheers Col

This topic has 16 replies, 12 voices, and was last updated 9 years, 1 month ago by pablo.

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April 13, 2017 at 12:18 pm #27004

keeweeman

Hi all

Looking for some advice with regards to what i now know to be a fairly well documented problem…

I have a 2016 cannondale synapse ultegra disc and i suspect that it has already developed a creaky bottom bracket. Some digging has led me to a few bits of information:

1/ It is a common problem with bb30 bottom brackets which i believe mine is

[Edit: just realised it is a bb30a, so now unsure as to whether the adaptors will even work anyways…]

2/ there are adaptors available to relocate the bearings to outside the frame in the same vein as a htii bottom bracket setup. The favourites seem to be Rotor and Praxis on this front.

So with that in mind i am looking for some information regarding my options really, the cranks on the bike are the cannondale own brand ones that came with it and ideally i would like to keep the costs down as this is more a frustrating issue than anything more sinister. Would the cranks on the bike now be compatible with the above adaptors or would i have to shell out on a set of new cranks as well as the adaptor if i were to go down that route?

Any help would be much appreciated!

Cheers

Col
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April 13, 2017 at 1:40 pm #891173
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Jimthebikeguy.com

Your bb problems are common
Your bb problems are common and you pretty much have no option but to change it out for a better one. Wheels Manufacturing will sell you what you need. They sell virtually every variant but their bb’s have a thread-together action which secures them, and the bearings are serviceable. You prb want a PF30 threadfit with inboard bearings, and they do three grades – cheapest, middle and expensive. I bought the middle one (comes with angular contact bearings).
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BB30 considerations…