Have just been thinking about new tyres for my TS V6 Advance. If I put 215/60's on the 15 inch rims (original 205/65).The benefits as I see them are- the car will sit 5 mm lower (without altering the suspension geometry), the tyres will be 10 mm wider (better grip) and being only 5 mm wider on each side, there should be no clearance problems. No probs with insurance. Anyone done this? any ideas? I have good mags, so am quite happy with these.

yes theres no probs with the size u want. it would only be a problem if it was bit more wider.

this link tells u if ur speedo will be fast or slow
http://www.miata.net/garage/tirecalc.html

im about to put mags on my magna which are 15x6'' rims and the factory tyes are 195/60/15 and ive been told by the tyre fitter up to 205's wont be a problem .