sefton1275gt
Dirt Disciple
Also, there seems to be countless lock rings on sjs
Replacing cup & cone BB with sealed. But which?
- Thread starter sefton1275gt
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sefton1275gt
Dirt Disciple
I just ordered a Tange 3922 from a company called Hubjub. Couldn’t source the n55 in my size.
I replaced the BB in a my 1961 Holdsworth Cyclone with a Tange 3922 (115mm).
But a thing to note is the Tange is symmetric, old BBs were probably not.
I measured the chain line and clearance on my 1982 Holdsworth Avanti (original BB) and copied that:
It turned out if I added a 3mm BB spacer to the drive side everything pretty much worked.
NB. don't tighten everything up before checking if it's scraping off your paint.
But a thing to note is the Tange is symmetric, old BBs were probably not.
I measured the chain line and clearance on my 1982 Holdsworth Avanti (original BB) and copied that:
It turned out if I added a 3mm BB spacer to the drive side everything pretty much worked.
NB. don't tighten everything up before checking if it's scraping off your paint.
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Luckily here the Deore groupset is part of the switch over and the direct replacement for a D-NL is the 122.5 Shimano sealed, that is also market as a D-NL.
If you look in the big Sutherland 6th Edition you can see comparable bb and the different calc/offset list for many different BBs.
I can't remember but Barnetts may have something similar.
cratecropz
Retro Newbie
I’ll get the shimano un55. But which length? 115 or 127?
