What tyres should I fit to match standard gearing?
10 February 2004, 11:07 AM
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What tyres should I fit to match standard gearing?
I have a 97MY UK turbo on which the OE 15" wheels have been replaced with 16" MY00 alloys. At the moment I have 205/45s which seem to be over recording mileage by approx 5% (checked against sigma bicycle computer). Now, the diameter on the OE 15" wheels would be 587mm, on 16" wheels with 205/45s 591mm and with 205/50s 611mm, which would seem to make matters worse. To get an exact match to the OE spec would mean fitting 225/40 16s but these are not recommended on a 7" rim. So what's best to match the OE fitment? What would be the result, with regard to gearing, if 215/40s were fitted? BTW suspension is standard.
11 February 2004, 02:59 PM
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Try this handy little utility from the Miatanet guys:
http://www.miata.net/garage/tirecalc.html
Bigfork - Ex-pat
http://www.miata.net/garage/tirecalc.html
Bigfork - Ex-pat
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