I thought I'd posted this question yesterday, but can't find it now, so maybe it never got there.

Anyway, my question.

I'm thinking of building a 700c wheel with an SA 5 speed hum to fit on a road frame. the frame at the minute takes a 7speed wheel with derailleur.

Will the the 5 speed SA hub fit, and if not, where is the discrepancy - hub too big, will need frame pulling to fit, or hub too small, so will need spacing.

Is there a chance the axle will be too short even to fit?

Memory tells me I should have no problem, but I'm going back to a time when 5 speeds were common, and those frames would take an SA hub.

Many thanks

Phil