Bottom bracket spindle length

Richardcs

Retro Guru
Hi... Hoping for some advice... I've just picked up an old orange p7 nickle.. I got a deore lx crankset with it, but no bottom bracket. I know it's a68mm shell, but how on earth do i work out what spindle length I need? Thanks for any advice
 
Re:

I think you have, but unfortunately also "LX" does not help.
either read the M5xx number of the back of the arms or take some pictures or both :)
There are various LX models.
they're probably FC-M563 and will use a 107mm bottom bracket for perfection, you could use a 113 if you don't mind the slightly wider chainline.
 
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