Aftermarket/bigger wheels

colsan · Post by **colsan** » Tue Aug 11, 2009 5:28 pm

The wifes mx has got standard 14" mazda wheels fitted but
i was thinking of getting some thing a bit bigger as i thought it would look nicer and fill the arches more.
1) do i have to worry about offsets on the wheels i buy?
whats the offset on the stock wheels?
2) how much will bigger dia rims effect the speedo reading and
is there a way round it ?
3) how big would people reccomend? (15's, 16's, 17's) is there a size thats too
big and will need spacers to stop it rubbing?

Stevo · Post by **Stevo** » Tue Aug 11, 2009 5:59 pm

I wouldnt go bigger than 16" or you may get "Tramlining". pcd=4x100 and offset around the 35-38mm mark. When you go bigger diameter, just lower the profile of the tyre to get a similar overall size. Changes over 5% should have speedo re-calibrated and may need certification. see http://www.alloywheels.com/TyreCalc.asp or http://www.miata.net/garage/tirecalc.html cheers stevo

Ian · Post by **Ian** » Tue Aug 11, 2009 7:33 pm

Tell us about your car and it might be easier to recommend something to suit....
What are you trying to achieve...a different look, more grip, all of the above?

poison · Post by **poison** » Tue Aug 11, 2009 9:28 pm

You can compare sizes here.....
http://www.miata.net/garage/tirecalc.html

The ultimate tyre calc, don't forget to select metric.

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colsan · Post by **colsan** » Wed Aug 12, 2009 5:15 pm

Any new wheels would be purely for cosmetics