[zefarelly]

Originally Posted by Gerard C

I seem to remember that any time, any appendix, any series, any country, any car, the arb's diameter is/are free. Going from plain to hollow design is forbidden.
As to the wheelbase, I can't see how you can move an axle staying compliant though… But there's a rather fair tolerance.
Seems that on some LC's, the rear wheels are rather difficult to extract without removing the shocks!

Axle location is a moot point . . . The FIa have all the information they need to nail it down.