What diameter wheel do most of you use on the MK Indy.
Cheers
Barry

most seem to use 15" with 195/50/15 tyres not sure if 13" fit

195/50 x R15 fitted on mine with no problems and fill the front and rear arches nicely.

A lot of people will recomend 13" rims with 185 F and 205 R tyres for the best traction and handling though IIRC some have had issues getting 13" rims to fit and have had to grind bits off brake calipers etc to get them on.

Also worth looking at tyre choice and price for your chosen wheel size. There seems to be a wider choice of 13" and 15" fitments over say 14" and the prices can vary quite a bit for different sizes too.