Bottom Bracket Type/Sizing

[TSCfree]

I've just bought an old steel frame for winter fixed wheeled training. How do I work out the size/type of bottom bracket? Its a Reynolds 531 1978 Claud Butler frame so I'm assuming its a British/ISO thread?

[gazza285]

No reason at all to believe it's anything other than a standard 68mm width ISO thread bottom bracket.

[TSCfree]

gazza285 said:

No reason at all to believe it's anything other than a standard 68mm width ISO thread bottom bracket.

Cheers as I've not bought cranks or hubs yet is there a way of finding out what will or won't match and also how do I find out the spindle lengths?