ms6073 wrote:Yes, but that is because the Vumaquad crank has a longer spindle - sort of a precursor to BBRight/EVO386 - than cranksets that were manufactured to conform to the BB30 standard.
I'm fully aware of that. Thus my post.
I wasn't saying the ZIPP is a BB30 crank. It has a 30mm spindle, that's where the similarity ends.
Each cup adds roughly 10mm in width which means your crank axle must be at least 88mm long > 68mm +10mm+10mm=88mm.
I suppose that info wasn't there when the O.P. was making his initial hunt.
Seems like some of the "purists" here, (and maybe I'm one of them) is getting hung up about the true definition of a BB30 crank set. I ride Cannondale and BB30. I tend to believe that to use that label your crank set better be able to fit in the traditional (68)mm OR (73)mm wide MTB shell. If you're crank spindle is so long that it uses outboard bearings then I consider it incorrect to call the crank set a BB30 crank.
So if your bike has a shell that is; BB30 / PF30 / Specialized 2013 OSB with NO outboard bearings, call it BB30.
The term has been bastardized by so many vendors who want to use the term.
Speaking of Specialized, what's up with them for 2013? The tech in my LBS said the shell in the 2013 Tarmac is slightly different than the normal PF30 inside diam. He said it was changed to a standard inside diameter dimension that is NOT PF30.
So which crankset are you trying to adapt to a BSA bottom bracket? Sorry to sound harsh but did you actually read through this entire thread? As already covered in this and many other threads, regardless of spindle length, those adapters more than likely will not work for what has been termed a 'true' BB30 cranks (i.e. Cannondale Hollowgram - been there, done that, doesn't)! Unlike a BB386/BBRight/BB386, the spider of 'true' BB30 cranks like the Cannondale Hollowgram, lack sufficient offset so while a longer spindle will allow you to install the crank, the lack of offset means that the longer spindle will simply move the chainrings further away from the bottom bracket which effectively puts the small chainring in alignment with were the large chainring should be. Based on personal experience with a Cannondale Hollowgram SRM and the Rotor BSA30 bearing cups, the only way I can see this working would be to mill/machine down at a minimum ~5mm from each side of the bottom bracket shell face in order to assure the correct chainline is maintained.Fixie82 wrote:Sorry for the grave dig but has anyone here had any experience with the First Components BSA to BB30 adapter? Looking for other options other than the Rotor version, of these cups.
Was simply doing some homework on other options apart from the Rotor cups before purchasing.
AFA - Thanks for the info, I think I may give these guys a try as I can get one in the colour I would like
The cups themselves are of an excellent finish with no blemishes and the bearings feel smooth and run freely. Cups are also supplied with a light coating of locktite. No spacers were supplied. All up would recommend and they have an excellent colour selection.
WP_001297 by Fixie82, on Flickr
WP_001298 by Fixie82, on Flickr
- Similar Topics
- Last post
- 11 Replies
- 358 Views
Last post by glepore
Tue Mar 06, 2018 8:08 pm
- 19 Replies
- 1256 Views
Last post by MichaelB
Tue Dec 05, 2017 11:58 pm
- 15 Replies
- 1083 Views
Last post by vinuneuro
Tue Jan 30, 2018 7:27 pm
- 6 Replies
- 819 Views
Last post by dim
Fri Dec 15, 2017 4:25 pm
- 2 Replies
- 601 Views
Last post by hambini
Mon Oct 16, 2017 1:26 pm