What BB Spindle standard would I need for these Retro Cranks (JIS or ISO)

[midibiker]

Hi,

Does anyone know what BB Spindle Standard I would need for any of these cranks?

Cooks
Topline
Grafton
Shimano
Suntour
Campagnolo

JIS or ISO?

 

[hamster]

ISO on Campag only. Earlier TA are ISO, later JIS.

 

[midibiker]

ISO on Campag only. Earlier TA are ISO, later JIS.

Cooks
Topline
Grafton
Shimano

Should be JIS?

 

[hamster]

Yes.

Square Taper Bottom Bracket Interchangeability

Dimensional standards for square-taper bicycle bottom-bracket spindles, and the limits of interchangeability among them.

www.sheldonbrown.com

Incidentally, I ran ISO cranks on JIS tapers and it didn't end happily.

 

[midibiker]

Yes.

Good as it all get a bit too confusing with these standards lol.

 

[hamster]

Don't get me started on all that Hollowtech, BB30 etc ...it gets even worse from 1999 onwards!!!

 

[midibiker]

Don't get me started on all that Hollowtech, BB30 etc ...it gets even worse from 1999 onwards!!!

OMG please no.

My head is spinning already with it all lol

 

[Jamesbike]

Bb30 just the best innit!!!

 

[synlos]

CQP with ISO taper on Shimano JIS BB-M730


CBR with JIS taper on Shimano JIS M730


Thats just an example to see how much the difference is. It's huge! Bot crank taper are alright.

 

[Midlife]

ISO and JIS have the same taper of combined 4 degrees. The ISO uses a slightly longer and thinner part of the same taper. Hence JIS cranks go too far on ISO axles. BITD we would mix and match and use whatever worked lol