Advice on bottom bracket replacement
pastryboy
Posts: 1,385
I followed an online guide that said to undo the non-drive side first. Tried that but the tool didn't fit in deep enough to engage the splines- was impossible to unscrew it.
I then decided to try the drive side - the whole thing came out no trouble at all. So what came out looked like this http://www.evanscycles.com/products/shi ... t-ec007426 but there was nothing on the left hand side - that was still inside the frame and impossible to budge. Is that a problem as it seems only to hold it in place?
The markings said the BB was 68x113. By coincidence I had a 68x116 lying around so I fitted that. It's gone in place fine. I assume the 113 to 116 won't cause a problem? Both came on bikes with a triple and the cranks went on with no trouble.
When I put the cranks on the newly fitted BB they don't spin as freely as on my other bike - they spin and there's no resistance or noise they just don't keep spinning fluidly. The BB has done a good few thousand miles -would that explain why or could it possibly have anything to do with the fitting?
Any answers/guidance much appreciated
I then decided to try the drive side - the whole thing came out no trouble at all. So what came out looked like this http://www.evanscycles.com/products/shi ... t-ec007426 but there was nothing on the left hand side - that was still inside the frame and impossible to budge. Is that a problem as it seems only to hold it in place?
The markings said the BB was 68x113. By coincidence I had a 68x116 lying around so I fitted that. It's gone in place fine. I assume the 113 to 116 won't cause a problem? Both came on bikes with a triple and the cranks went on with no trouble.
When I put the cranks on the newly fitted BB they don't spin as freely as on my other bike - they spin and there's no resistance or noise they just don't keep spinning fluidly. The BB has done a good few thousand miles -would that explain why or could it possibly have anything to do with the fitting?
Any answers/guidance much appreciated
0
Comments
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so you have fitted a BB with a longer axle. so you have changed your chain line.
have fun setting up your gears and expect a tad more chain noise.
different BB have different feels. and if it has not been used for some time....."Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools :?:SheldonBrown0 -
If I understand things right - the spindle length is only important in terms of getting the right one to go with the chainset?
If I'm right I'd like to get a cheap new chainset (seems to be cheaper than replacing rings) and a corresponding BB for it.
What about the bit that's left in the frame - assuming I'm going for the same fitting type of BB (square taper) can it just stay there as I can't see it coming out without trying another tool?
Thanks0
