Unless you have lowering knuckles fitted you should have it at 368mm from the wheel centre to arch edge (+/- 10mm) measured at 17 degrees C. The sphere pressure shoudl be around 400psi (+/- 10psi ish).
Just passed its MOT according to the listing so the tester must have thought it was ok ! Like you said it must be a nightmare to drive . they must not have got speed bumps like the ones near me.