When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I would say you need one with more teeth - it is the driven gear so if it had more teeth, it would spin slower, giving you a lower reading at the speedo.
Take a look at this screenshot I took showing a stock tire size with a typical 3.27 gear ratio that the ford builds run in Miatas.. the correct tooth count in this case shows to be 20.3 so the tool recommends the black 20 tooth gear (the Monster Miata manual recommends the 21 tooth red gear for this same combination) but either way it falls somewhere in the middle... so you will not be perfect no matter what.
03-19-2019, 11:38 AM
