My mate has 315-80 tyres and 22.5 x 9 wheels and they easily fit over that size, and super single lorry tyres are I think 445-80 and they fit over them easily enough, though the maximum size you could clamp I don't know.
bloody hell!
He works around Thurrock a lot, if he gets clamped around that area it is a £1700 release fee.
