NDS BB Gap
#1
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NDS BB Gap
Bought a new Andel Track Crankset a long while ago with a Shimano BB, just installed it. Basically I can pick between a gap on either side, should I even try to remedy it or just leave it?
Noticed the old Andel RSC'1 are a lot more narrow than the newer Andel's.
Noticed the old Andel RSC'1 are a lot more narrow than the newer Andel's.
#2
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The Andel RSC1 cranks require a 103mm JIS BB, whereas the Andel Standard cranks require a 110mm JIS BB.
I don't understand that photo, because the NDS cup should be fully threaded with no flange, so that it can be adjusted.
I don't understand that photo, because the NDS cup should be fully threaded with no flange, so that it can be adjusted.
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Last edited by TejanoTrackie; 06-07-21 at 07:58 PM.
#3
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What TT said. Usually the drive side cup bottoms out on a flange against the BB shell, and then the non-drive side stops anywhere from just proud of the shell’s edge to flush with it, but there should be nothing on the outside to stop it.
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Dunno ... that looks like a UN55, which has a flange on both sides. Wouldn't be my choice, but you could probably put a spacer in there to close the gap.
Last edited by Rolla; 06-08-21 at 12:22 AM.
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Dunno ... that looks like a UN55, which has a flange on both sides. Wouldn't be my choice, but you could probably put a spacer in there to close the gap.
OP, I think it shouldn’t be a problem, assuming the inner surface is pressing against the cartridge body. Not sure why they put that flange on the ND side. There must be a reason, but it might not be an important one in your application.
#6
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Dunno ... that looks like a UN55, which has a flange on both sides. Wouldn't be my choice, but you could probably put a spacer in there to close the gap.
Not sure why they won't play nice together. Does anyone have a suggestion for a different BB? I'm about to just grab this and call it a day. https://www.retro-gression.com/colle...14086513262653
Last edited by Philasteve; 06-08-21 at 02:53 PM.
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I'm a fan of the Velo Orange bottom brackets -- the 110 is even in stock rn.
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Not sure why they it won't play nice together. Does anyone have a suggestion for a different BB? I'm about to just grab this and call it a day. https://www.retro-gression.com/colle...14086513262653
The reason the Shimano BB-UN55 won't work with your frame, is that it expects the frame's BB shell to be exactly 68mm wide, and yours must be just a tiny bit less, resulting in the gap. It's really a very stupid design, and I think you are wise to get something else.
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Wouldn't be my choice, but you could probably put a spacer in there to close the gap.
The reason the Shimano BB-UN55 won't work with your frame, is that it expects the frame's BB shell to be exactly 68mm wide, and yours must be just a tiny bit less, resulting in the gap. It's really a very stupid design, and I think you are wise to get something else.
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Yes, but if the spacer is too thick, then the NDS cup won't fit snug against the BB cartridge, which can lead to play and creaking. I still say it's a stupid design, and the OP is better off getting something else that isn't a hassle.
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#11
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That's an excellent choice, very good quality at a very reasonable price. I was going to suggest the IRD QB-55 that is the same price but lighter weight, but unfortunately it is out of stock at RG.
The reason the Shimano BB-UN55 won't work with your frame, is that it expects the frame's BB shell to be exactly 68mm wide, and yours must be just a tiny bit less, resulting in the gap. It's really a very stupid design, and I think you are wise to get something else.
The reason the Shimano BB-UN55 won't work with your frame, is that it expects the frame's BB shell to be exactly 68mm wide, and yours must be just a tiny bit less, resulting in the gap. It's really a very stupid design, and I think you are wise to get something else.
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This is a UN-55 in one of my bikes. Can you make out the spacer? It's there. When I first got this frame, I had the shell faced - damn thing came back 67mm wide. Like on the OP's bike the UN-55 I got for it would not snug-up all the way on the NDS. I decided to put a 1 mm spacer on the drive side. Works good for me. Hope whatever you choose to do on your bike works as well for you...
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This is a UN-55 in one of my bikes. Can you make out the spacer? It's there. When I first got this frame, I had the shell faced - damn thing came back 67mm wide. Like on the OP's bike the UN-55 I got for it would not snug-up all the way on the NDS. I decided to put a 1 mm spacer on the drive side. Works good for me. Hope whatever you choose to do on your bike works as well for you...
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I agree with JohnDThompson on my RRB track bike, the BB was likely faced by previous owner. Used a spacer, and perfect fit. Easy peasy.
#15
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No more open gap, NDS cup was on there super tight when I pulled it from the box. Screwed it in and almost put my elbow through the wall trying to pull it off. Probably an easier way but oh well.
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