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Any idea how to re-calibrate your speedometer after putting on 18's?
calibrating speedometer after new wheels install?
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You may not have to. As long as the TOTAL DIAMETER of the wheel and tire remains the same (ex, 17" wheel, with a 45 profile VS an 18" wheel with a 40 profile = same total diameter), you will not need to.
Measure the tire diameter VS the aftermarket 18's you just strapped on. Good luck.
Measure the tire diameter VS the aftermarket 18's you just strapped on. Good luck.
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It's definately off. The new set up is much bigger.
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What profile tires do you have on with the 18's?
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245/45/18
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:doh:
Track sizes are :
Front - Rays Engineering 8.0JJ x 18" Forged Alloy Wheels (+30mm offset / 8.1kg) with 225/45 R18 91W Bridgestone Potenza RE040
Rear - Rays Engineering 8.5JJ x 18" Forged Alloys (+33mm offset / 8.3kg) with 245/45 R18 96W Bridgestone Potenza RE040
so you don't need re-calibrating - you've increased the size of your rim, but decreased the size of the tire sidewall
Track sizes are :
Front - Rays Engineering 8.0JJ x 18" Forged Alloy Wheels (+30mm offset / 8.1kg) with 225/45 R18 91W Bridgestone Potenza RE040
Rear - Rays Engineering 8.5JJ x 18" Forged Alloys (+33mm offset / 8.3kg) with 245/45 R18 96W Bridgestone Potenza RE040
so you don't need re-calibrating - you've increased the size of your rim, but decreased the size of the tire sidewall
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