Tyres are stock 14" size for a MK1
Toyo Proxes R888 GG 185/60/14
Rims are 14" x 6" (et 38 I think) they're dealer optioned rims off a MK3, generic domestic wheels. The design is good for cooling and cleaning.
Running 23psi at every sort of race in every sort of condition, although I am only doing short events, pressures would have to be higher for longer events.
The car works very well with size tyre as the stock geometry is perfectly setup for it.
The car's only about 30mm lower than stock thanks to the King Springs but body roll isn't much of an issue and suspension travel lets the Koni shocks do their thing properly.
Having ground clearance helps when you clip kerbs, run off the track and loading it back on the trailer. :-)