Official YARIS Wheel & Tire Guide

[Neinris]

Originally Posted by kimona

My speedo was off right out of the box. After installing 205/50/16's, I was surprised to discover it was bang on!

This makes me wonder if there are different ring and pinion sizes for the speed sensor. Because I'm using the supposedly "STOCK" 185/60 R15 tire size, and I'm going 3.3% faster that what's indicated by my speedometer. Really annoying.

It coincides with what this calculator says:

http://www.rimsntires.com/specspro.jsp

Punch in 175/65 R14 for the first set and 185/60 R15 for the second set.

[mitch9521]

Originally Posted by Neinris

This makes me wonder if there are different ring and pinion sizes for the speed sensor. Because I'm using the supposedly "STOCK" 185/60 R15 tire size, and I'm going 3.3% faster that what's indicated by my speedometer. Really annoying.

It coincides with what this calculator says:

http://www.rimsntires.com/specspro.jsp

Punch in 175/65 R14 for the first set and 185/60 R15 for the second set.

I run 175/65/R15(stock size) winter tires and 205/45/R16 tires for summer, my speedo is always 100% accurate, I even verified it with GPS.

Might be a 3rd gen thing, I dunno. I have never owned a 2nd gen

[Neinris]

Originally Posted by mitch9521

I run 175/65/R15(stock size) winter tires and 205/45/R16 tires for summer, my speedo is always 100% accurate, I even verified it with GPS.

Might be a 3rd gen thing, I dunno. I have never owned a 2nd gen

Did you mean 175/60/R15? Because 175/65/R15 has a much larger circumference that a 205/45/R16. I would agree 205/45/R16 because that's the close to 175/65/R14's circumference, which is what I believe my car is dialed to.