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 Post subject: BB30a and Shimano Crank
PostPosted: Fri May 02, 2014 4:18 pm 
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Joined: Fri Feb 16, 2007 12:59 am
Posts: 7
Location: 5280
Just an fyi since I've searched and searched on the subject and couldn't come across anything concrete...

I finished my 2014 Cannondale Synapse Hi-Mod build last night, Di2, using a 7900 Srm crankset. I called Dan at Wheels Mfg and he shipped out their adaptor kit for this and it worked like a charm.

The kit comes with 2 machined adaptors and a series of 8 washers in different widths. Took about 3 tries until I got it dialed. Ultimately I needed to use 2-1mm washers on the drive side to keep chainring bolts from hitting the chain stay.

Test ride today.....


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PostPosted: Fri May 02, 2014 10:02 pm 
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Joined: Wed Mar 18, 2009 10:37 pm
Posts: 21
Location: Denver
Ride was a success.....a couple hours along the foothills with climbing. No problems.


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Posted: Fri May 02, 2014 10:02 pm 


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PostPosted: Fri May 02, 2014 10:09 pm 
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Joined: Tue Sep 20, 2011 12:54 pm
Posts: 395
Location: Haines, AK - Temporarily
Awesome. I've been eyeing the new Synapse.

Someday, I'd like to get one.


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PostPosted: Mon May 05, 2014 10:13 am 
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Joined: Mon Oct 13, 2008 11:20 am
Posts: 64
Location: Lausanne, Switzerland
I work at a Cannondale dealer. I've asked two different Cannondale reps and one of their guys who is supposedly a tech expert about what other cranks work with the BB30A system in the new Synapses, and no-one has been able to give me an answer about which cranks can be used or what adapters are needed for certain cranks. One of the guys is supposed to be finding out an answer for me, but he hasn't got back to me in more than a week, so I guess I'll have to ask again.

I hate Cannondale and their pointless incompatibility. Their own employees can't even keep up with their new standards!

Their current 3 road frames use 3 different bottom brackets! SuperSix Evo = PF-BB30, Synapse = BB30A, CAAD 10 = BB30. Please stop this insanity!


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PostPosted: Mon May 05, 2014 11:18 am 
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Joined: Sat Sep 22, 2012 2:22 pm
Posts: 218
Just as an aside I fitted the Praxis works BB30 adaptor to my Felt AR1. The bike is less than 2 weeks old and has developed a click from the bb when putting down lots of power. I have a feeling it may be down to a lack of grease between the shell face and the adaptor. In going to strip it down and apply more grease to see if that helps. Otherwise it seems like a good solution to the problem.


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PostPosted: Mon May 05, 2014 3:36 pm 
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Joined: Sat Sep 22, 2012 2:22 pm
Posts: 218
I whipped the cranks off this afternoon and took the drive side bearing out of the frame. As expected the flat portion of the shell and the inside of the bearing cup were dry. I had thought that some of the copper anti seize would have oozed out when fitting but this hasn't happened. I covered both surfaces in copper anti seize and after a quick test it seems the creak had gone, but will only know for sure after a few weeks use.


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PostPosted: Wed May 07, 2014 3:16 am 
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Joined: Fri Feb 16, 2007 12:59 am
Posts: 7
Location: 5280
Chris, I'm right there with ya!!
I went through the same thing.....I asked and received numerous answers about the Synapse BB. One answer was "absolutely, cannot run a 7900 crank on a BB30A"!
I was literally seconds from ordering the SISL crank, getting a Stages, and eBaying my SRM! Then I remembered that a few years ago when I was racing a Venge, I had to go through the same exact thing.....and Wheels Mfg had adaptors for that, so I called them with fingers crossed. Success!



Chris_W wrote:
I work at a Cannondale dealer. I've asked two different Cannondale reps and one of their guys who is supposedly a tech expert about what other cranks work with the BB30A system in the new Synapses, and no-one has been able to give me an answer about which cranks can be used..........
Their current 3 road frames use 3 different bottom brackets! SuperSix Evo = PF-BB30, Synapse = BB30A, CAAD 10 = BB30. Please stop this insanity!


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PostPosted: Fri May 30, 2014 7:48 pm 
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Joined: Wed Feb 20, 2013 7:37 pm
Posts: 53
That is such great news! I've been looking for an answer on this forever. Thank you so much. Do you have any photos of your bike with the Shimano crankset?


Sent from my iPad using Tapatalk HD


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PostPosted: Sun Jun 08, 2014 1:54 pm 
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Joined: Sun Jun 08, 2014 10:58 am
Posts: 5
Hi, And directed particularly to Bikeshat,

I've just posted up about a very similar issue with my Cannondale Synapse Carbon 6 105.. with creak of course.

Just to confirm please Bikeshat.. you used the WM Shimano Crank adaptor and it worked fine with your FC7900?

I was planning to go to plain old Integra FC6750 and my concern was that the Shimano tech for the 6750 (same as 7900..) is that it only goes up to 70mm BB and our BB30A is 73mm wide before you even start putting the shims in.

I actually measured my BB to confirm it was 73mm.. I assume yours is the same.

If you reckon it all fits and works and yours is also 73mm then I'll commit to the WM kit and FC6750.

(I assume no creak also..!)

Hope you can help..
Cheers,
Simon


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PostPosted: Mon Jun 16, 2014 1:22 am 
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Joined: Fri Feb 16, 2007 12:59 am
Posts: 7
Location: 5280
Hey Harrison,
Sorry for the delay, I haven't been around in a while.

The Wheels mfg parts are still working like a charm on my Synapse, no squeaking either! Although I split the crown race, like I've done a ton of times for other bikes, and it creaks like crazy! Gonna need to get a new OEM one and just pound it on.

I'm assuming you went ahead with the adaptors by now and have discovered that they work with your crank as well.....at least I hope so!

Ill try to get pics up.


harrisonsimon wrote:
Hi, And directed particularly to Bikeshat,

...............no tech for the 6750 (same as 7900..) is that it only goes up to 70mm BB and our BB30A is 73mm wide before you even start putting the shims in.

I actually measured my BB to confirm it was 73mm.. I assume yours is the same.

If you reckon it all fits and works and yours is also 73mm then I'll commit to the WM kit and FC6750.

(I assume no creak also..!)

Hope you can help..
Cheers,
Simon


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PostPosted: Tue Jul 01, 2014 10:02 pm 
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Joined: Wed Feb 20, 2013 7:37 pm
Posts: 53
I called Cannondale tech support this afternoon and was told that they will be coming out with a solution for people wanting to run Shimano cranksets with the new Synapse. Said it should be available in a month or two. In the mean time the tech referred me to Problem Solvers for an adapter that will use the bb30 bearings, like the Wheels MFG model I assume. Does anyone have any experience with Problem Solvers? Any reason to go with Wheels MFG instead? I received an email back from Wheels saying that they don't have a product that will work which is confusing given what's been said by the OP. OP, what exact model did you order?


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PostPosted: Mon Jul 14, 2014 2:56 am 
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Joined: Thu Jun 19, 2014 4:05 am
Posts: 6
I have a 2014 synapse and just bought a sram crank which I will run w a ultegra di2 set. I have the 68mm sram bb30 bb and the bb30 crank. What do I have to to get this working on the bike. Pls help...so confused.


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PostPosted: Mon Jul 14, 2014 4:24 am 
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Joined: Fri Dec 11, 2009 10:38 pm
Posts: 1126
Location: Toronto
Although they don't refer to the Synapse specifically, the SRAM instruction do refer to installing a BB30 crank on a 73mm shell. Just leave out the 2 x 2.5mm spacers.

Because the Synapse is assymetric, possibly there is still a thin spacer needed on the DS. Why don't you try it and report.

https://www.sram.com/sites/default/files/techdocs/2014_xx1_service_manual_0.pdf

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PostPosted: Mon Jul 14, 2014 12:42 pm 
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Joined: Wed Feb 20, 2013 7:37 pm
Posts: 53
Shogunade, which sram bb30 crank do you have? Red bb30 cranks have a shorter spindle than Force or non-series cranks, to my understanding.


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Posted: Mon Jul 14, 2014 12:42 pm 


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PostPosted: Wed Jul 16, 2014 12:10 pm 
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Joined: Thu Jun 19, 2014 4:05 am
Posts: 6
Ltoddokc wrote:
Shogunade, which sram bb30 crank do you have? Red bb30 cranks have a shorter spindle than Force or non-series cranks, to my understanding.


Oh, good question. I have the red 22. I'll have my lbs try and just fit it in the way bikerjulio described. Will report back in a few wks as I'm away from my bike.


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