Swapping FSA Gossamer cranks, BB30 to Ultegra?
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Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby colinmc400 » Mon Sep 30, 2013 11:00 pm
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby Duck! » Mon Sep 30, 2013 11:47 pm
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby colinmc400 » Tue Oct 01, 2013 9:26 am
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby ball bearing » Tue Oct 01, 2013 9:34 am
Wheels Manufacturing company makes very good adaptor inserts. I have been using them with no problems.colinmc400 wrote:Thanks Duck, so its this sort of thing you are talking about? http://www.ebay.com.au/itm/BB30-Bottom- ... 4613c80bea" onclick="window.open(this.href);return false;
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby im_no_pro » Tue Oct 01, 2013 9:54 am
master6 wrote: Moderators are like Club Handicappers; I often think they are wrong, but I dont want the job.
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby pawnii » Tue Oct 01, 2013 9:57 am
The ultegra will be a massive improvement in shifting (if it's a 6700 crankset).
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby Duck! » Tue Oct 01, 2013 7:05 pm
That's not the exact thing I was thinking of, but yes, that will do perfectly.colinmc400 wrote:Thanks Duck, so its this sort of thing you are talking about? http://www.ebay.com.au/itm/BB30-Bottom- ... 4613c80bea" onclick="window.open(this.href);return false;
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby colinmc400 » Tue Oct 01, 2013 7:47 pm
Thanks again!
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby scirocco » Tue Oct 01, 2013 8:58 pm
http://compare.ebay.com.au/like/1510473 ... 1047370380" onclick="window.open(this.href);return false;
+1 on the Ultegra being a massive improvement.
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby Cul » Wed Oct 02, 2013 6:36 am
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby pawnii » Wed Oct 02, 2013 8:19 am
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby Duck! » Wed Oct 02, 2013 8:25 am
Requiring a "light tap with a mallet" as in the previous post indicates that it's still a suitably snug fit, similar to the crank through the bearings. I'd be worried if they could be fitted without any kind of resistance.pawnii wrote:not a good sign if they're that easy to get in
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby macca33 » Wed Oct 02, 2013 8:29 am
cheers
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby Duck! » Wed Oct 02, 2013 8:39 am
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby pawnii » Wed Oct 02, 2013 8:46 am
I've had unresolvable issues on 5 or so frames.
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby im_no_pro » Wed Oct 02, 2013 8:47 am
master6 wrote: Moderators are like Club Handicappers; I often think they are wrong, but I dont want the job.
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby pawnii » Wed Oct 02, 2013 8:50 am
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby Duck! » Wed Oct 02, 2013 8:55 am
The Wheels MFG ones linked earlier fit into the BB30 bearings & step out & down to accept the Shimano crank. Others I was originally thinking of press into the frame in place of the BB30 bearings, so the end result is more of a BB90 format. All press-fit, whether BB30, BB86 or BB90 rely on correct tolerance from the frame manufacturer to work properly.im_no_pro wrote:OK so have a mate in a similar situation at the moment, had already pointed him in the direct of the adaptors. The one thing im not sure on is whether the adaptors adapt to the crank or the BB, i.e. which BB do you use, the original one or one that is compatible with the new cranks?
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby scirocco » Wed Oct 02, 2013 11:11 am
The Wheels Mfg adaptors don't replace the bearings (which ARE a press fit). You keep the original BB30 bearings and you can think of the adaptors as a kind of shim that allows the smaller diameter cranks to match up with the internal diameter of the BB30 bearings.Cul wrote:The Wheels adapters are hardly press in,I found the went in easily with a light tap with the mallet. They work perfectly too!
Whereas the KCNC adaptor that I linked to completely replaces the existing BB30 bearings. It's really more like a conventional BB. The benefit is that it screws itself together and simultaneously presses its bearings into the shell, so you can completely remove and replace the whole assembly without the need for a bearing press.
Which, given the amount of trouble that a lot of people have with BB30 creaking, is a nice feature.
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby pawnii » Wed Oct 02, 2013 11:20 am
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby macca33 » Wed Oct 02, 2013 11:26 am
Fair enough, wasn't aware of such discrepancy.Duck! wrote:Not all FSA cranks are created equal; there's a greater performance difference between their good & cheap ones than there is with Shimano (whose cheap cranks still perform very well). The Gossamer in the OP is in a different league to your SL-K.
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby brawlo » Wed Oct 02, 2013 1:51 pm
I'm currently riding DA on a Felt F4 with wheels adapters to the original bearings. Because of my weight, I can see the adapter setup not lasting as long as I'd like, but I'm yet to make an experienced call on that. My plan is to replace everything with a Praxis BB when the time comes to replace bearings or adapters.
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby scirocco » Wed Oct 02, 2013 3:20 pm
The Praxis has an expanding "wedge" that clamps the unit radially outwards to the inside of the bearing shell, and this clamp is what stops the whole thing moving laterally. The bearing carriers are not torqued super hard laterally into the shell - they end up wherever the stop on the wedge leaves them.
The KCNC doesn't have the expanding wedge. It relies on torque to clamp the left and right side sections together. The bearings carriers are clamped laterally into the shell with the full force of the fitting.
Hard to say which system would be superior and lead to less movement between bearing carrier and shell.
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Re: Swapping FSA Gossamer cranks, BB30 to Ultegra?
Postby colinmc400 » Sat Oct 19, 2013 10:26 am
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