Fitting Wheels

I'm thinking of getting new wheels for my March but I'm not sure what to look for. All I know is 4x100. Is there anything important like offset(whatever that is) etc?? If I get bigger wheels do I have to lower the vehicle and what do I do with the speedometer, for it will say less than that actual speed?? Do I have to modify computer or???

do a search.

make sure new wheels are around 38mm offset, 4*100 PCD. 15 inch with 195/50 or 195/45 tyres will fit fine.

you can calculate the desired tyre size with this;

http://www.lankamini.o-f.com/tyreSize.html

I really like this calculator:

www.miata.net/garage/tirecalc.html

very useful, great for printouts too..