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Flyin' Miata gearing calculator

Wondering what a change in tire size will do to your gearing? How about a change in the rear end ratio, or a 6-speed swap? Well, now you can find out.

Setup   Result

Target speed: mph
Target rpm: rpm

Tire size
/ -

Transmission

Rear end

Stock rear end ratios for North America

1990-93 5-speed 4.30
1994-97 5-speed 4.10
1999-05 5-speed 4.30
1999-03 6-speed 3.909
2004-05 6-speed 4.10
2006- all trans 4.10

Please note that the 3.308 rear ratio is includes for calculation purposes only, and is not currently available.
 
  ratio
1st
2nd
3rd
4th
5th
6th

 

 


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