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Discussion Starter · #1 ·
does anyone knows what size i need switching from 215/45 17 to 16''. I wanna do that like my others cars so its cheaper but i dont remember whats the formula or site to do it? thanx
 

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Discussion Starter · #3 ·
Yeah but?........

Yeah thats what i wanted to do but ex is 15" and cannot put 15 on sx because of the front brake sooooo......?
 

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may i suggest a tire..... hankook IPike W409.... that what i have on my stock SX wheels
 

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Discussion Starter · #6 ·
thx

thx but i dont remember how do you get to know that, im looking for continental, always been great for me, thx ill check those
 

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i was too but after reading reviews and friends having them in seattle on BMWs and they made it everywhere.... but nothing wrong with continental
 

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A 215/45/17 has an OD of 24.7 inches, and a 205/55/16 has an OD of 24.9 inches. Thats how I decided I was getting that winter size. As close as I could get to stock tire size for speedometer accuracy, and the 55 series having a larger cushioning sidewall for the winter.

The iPikes look great with studs - are they directional though??
 

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I used http://tiresizecalculator.info put in stock size 215/45/17 and asked for compatible 16's and got this list:

295 35/16, diameter diff: -1.98% , speedometer will read faster than actual.
175 60/16, diameter diff: -1.42% , speedometer will read faster than actual.
235 45/16, diameter diff: -1.18% , speedometer will read faster than actual.
265 40/16, diameter diff: -1.10% , speedometer will read faster than actual.
305 35/16, diameter diff: -0.86% , speedometer will read faster than actual.
195 55/16, diameter diff: -0.70% , speedometer will read faster than actual.
165 65/16, diameter diff: -0.70% , speedometer will read faster than actual.
215 50/16, diameter diff: -0.62% , speedometer will read faster than actual.
155 70/16, diameter diff: -0.30% , speedometer will read faster than actual.
145 75/16, diameter diff: -0.22% , speedometer will read faster than actual.
275 40/16, diameter diff: +0.18% , speedometer will read slower than actual.
245 45/16, diameter diff: +0.26% , speedometer will read slower than actual.
315 35/16, diameter diff: +0.26% , speedometer will read slower than actual.
185 60/16, diameter diff: +0.50% , speedometer will read slower than actual.
225 50/16, diameter diff: +0.98% , speedometer will read slower than actual.
205 55/16, diameter diff: +1.06% , speedometer will read slower than actual.
325 35/16, diameter diff: +1.38% , speedometer will read slower than actual.
175 65/16, diameter diff: +1.38% , speedometer will read slower than actual.
285 40/16, diameter diff: +1.46% , speedometer will read slower than actual.
255 45/16, diameter diff: +1.70% , speedometer will read slower than actual.
165 70/16, diameter diff: +1.94% , speedometer will read slower than actual.
 
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