tomsmart27

I am currently trying to get this bike back on the road. Ages ago the bottom broke and I bought a new one, but it wouldn't fit. We sort of gave up but now are back with a vengeance.

Unfortunately, the sticker has come off of the bottom bracket, but I think I bought a 68x113. Looking at the specs below, suggests I should have bought a 68x110.

https://www.bikepedia.com/quickbike/B...wood&Type=bike

Is this 113 useless, or would you expect it to just stick out a further 3mm? We tried to fit it, but would only screw in a certain amount, maybe about a third in.

Do I need to buy a new bottom bracket, or just grow some muscles.

Thanks in advance.

bikeman715

chase out the treads in the BB. maybe you are cross treading as you are going in. buy a new BB of 110 mm. it will stick out 3 mm longer which may throw your chain line off a little bit .

lifeinajug

make sure it is the right threading. There are several styles that aren't interchangable. Sheldon has a great page with the info...

Bill Kapaun

3MM is only about 1/8"! 7 speed cogs are spaced on 5MM centers, so you're just a bit over 1/2 cog off.
Add to the fact, it may only protrude 1.5MM further on EACH side?
There's a possibility that it MIGHT improve your "effective" chain line, if you tend to use the smaller cogs.

Your problem is NOT the length of the spindle.

smurf hunter

Yeah, aside from potentially awkard chainline, you could probably increase spindle length by 5mm or longer.
As was said, double check your threading and shell width (english/ISO, italian, french - 68mm/70mm/73mm, etc.)

griftereck

will be 1.5mm as it'll be on either side of the axle the difference in size

tomsmart27

Cheers guys much appreciated, i thought a few mm shouldnt hurt.

operator

This discussion of chainline is pretty irrelevant until you figure out why the BB isn't threading in all the way. Chase threads? Unmarked bb not english/compatible with your current bike? etc. etc.