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Need Speedometer Recalibration?

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Old 05-12-2014, 01:48 PM
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Default Need Speedometer Recalibration?

I swapped out my 16" OEM AP1 rims for some 17" OEM AP2 V1 rims. I was wondering if this wheel size change will affect my speedometer and odometer? If so, is there an easy fix?
Old 05-12-2014, 01:56 PM
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Rim size doesn't matter, you need to know the tire size. You can get a 17" tire that has the same outside circumference as a 16" tire and the speedo would be fine. Google tire size calculator.
Old 05-12-2014, 05:56 PM
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Check out the Modifry yellow jacket for speedo correction

http://modifry.com/products/yj/index.htm
Old 05-12-2014, 08:44 PM
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245/40/17's on the rear and your speedo will still be correct
Old 05-13-2014, 08:50 AM
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go here http://willtheyfit.com/
Enter old then new size of wheel/tire and you will have your results of how far off your speedo will be.
Old 05-14-2014, 12:30 PM
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How do I measure the wheel width?

I went from AP1 OEM 16" to OEM AP2 V1 17"
Old 05-14-2014, 04:43 PM
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As previously stated, wheel size isnt important, it's your tire size (think overall circumference).

What were your tires sizes before/after.
Old 05-14-2014, 05:09 PM
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Tire sizes before
Hankook Ventus V12 on Stock OEM AP1 wheels
Front 205/55ZR16 94W Still in decent shape
Rear 225/50ZR16 96W Down to 2/32" and 3/32"

New wheels and tires: Used, but in good shape on OEM AP2 V1 wheels
Bridgstone Potenza RE 050
Front 215/45R17 87W
Rear 245/40R17 91W


How do I read the age/year code?
Old 05-14-2014, 05:17 PM
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Thanks. With that, your speedo will read slow by 0.57% which is next to nothing. So when your speedometer indicates 60mph, you're actually going 59.6 mph

As far as tire date code, look for the 4 digit code. It's in week week year year format. So date code of 3512 means, manufacture date is 35th week in 2012.
Old 05-14-2014, 05:38 PM
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Thanks! This forum is awesome. I appreciate everything. I'm never too old to learn something new.


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