Question (s) for those with 19" wheels:
11-27-2005, 03:34 PM
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Question (s) for those with 19" wheels:
What size tire are you running? Are your tires roughly 1.5" larger than stock, and therefore cause the overall final drive ratio to decrease? I went from the stock 225/45/17 wheels/tires to 235/35/19. I measured them, and they are roughly 1.4" larger than my stock tires and I've noticed a large decrease in the butt-dyno. It feels like I'm driving my VR6 Jetta again....UGH! Is it me? Does anyone have any numbers to substantiate my claim? Thanks.
11-27-2005, 04:07 PM
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225/45/17 is most like 225/35/19 the speedo is .9% slow so when is says your going 60 your going60.5
<ul><li><a href="http://www.miata.net/garage/tirecalc.html">calc</a></li></ul>
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11-27-2005, 04:15 PM
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rim does not matter its the tire... but yes for 18 you would want
225/40/18 its .5% slower so @ 60 you are going 60.3 or even better 255/35/18 for the best .2% slower so when is says 60 your going 60.1
