124mm bottom bracket
- Thread starter busdennis
- Start date
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- Location
- The TerrorVortex
I can't easily find one.
My LBS doesn't stock them, and they're pretty good with obscure bits (they still have cotter pins!!!)
My LBS doesn't stock them, and they're pretty good with obscure bits (they still have cotter pins!!!)
fossyant
Ride It Like You Stole It!
- Location
- South Manchester
So long as the huge 1mm less either side won't foul anything then fine ! I assume square taper ?
RecordAceFromNew
Swinging Member
- Location
- West London
Fwiw I think in the fuzzy world of square tapered bb with various historic "standards" nothing is certain until tried and tested, and it probably depends on which 124mm bb.
If it is 3NN in Sheldon's database, then the 122.5mm/NL Shimano UN54 bb is likely to be ok although I believe the left side may be around 3mm short (because not only the NL is shorter it is also asymmetric). If only the spindle requires replacement, then a more reliable alternative may be to buy something like this.
If it is the 3U then the UN54 127.5mm/EL, which is 3mm longer on the right than the NL, will deliver a better chainline, or alternatively this.
There are other possibilities, so a clearer identification of existing might help.
If it is 3NN in Sheldon's database, then the 122.5mm/NL Shimano UN54 bb is likely to be ok although I believe the left side may be around 3mm short (because not only the NL is shorter it is also asymmetric). If only the spindle requires replacement, then a more reliable alternative may be to buy something like this.
If it is the 3U then the UN54 127.5mm/EL, which is 3mm longer on the right than the NL, will deliver a better chainline, or alternatively this.
There are other possibilities, so a clearer identification of existing might help.
