How much play is acceptable in a bottom bracket, as measured at the end of the crank arms?
I have a Giant Expression N7 hub gear bike, which has a semi-cartridge bottom bracket ie adjustable at the non-drive side only by means of a Shimano-type JIS cup and lockring.
A couple of months ago I took the bottom bracket out to test my fettling skills. The other day I noticed play in the cranks. I've tightened the cup and refitted the lockring. There is no visible play in the bottom bracket axle but about 1-2mm at the end of the crank arm when both cranks are fitted. Is this acceptable?
If it is going to cause harm then I would rather fix it but I am conscious of knowing when to stop bearing in mind my fettling skills and aptitude (fair to middling only).
Thanks in advance for any guidance.
I have a Giant Expression N7 hub gear bike, which has a semi-cartridge bottom bracket ie adjustable at the non-drive side only by means of a Shimano-type JIS cup and lockring.
A couple of months ago I took the bottom bracket out to test my fettling skills. The other day I noticed play in the cranks. I've tightened the cup and refitted the lockring. There is no visible play in the bottom bracket axle but about 1-2mm at the end of the crank arm when both cranks are fitted. Is this acceptable?
If it is going to cause harm then I would rather fix it but I am conscious of knowing when to stop bearing in mind my fettling skills and aptitude (fair to middling only).
Thanks in advance for any guidance.