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Originally Posted by REDDYZ
Dan, whats involved in calibrating speedo when you replaced your wheels with 19"s? Just electronic calibration or replacing speed sensors, etc...
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To be honest, I have no idea. I didn't do it. The variance is a few km's (on the 'wrong' side) but I just take that into account. Never been done for speeding since having the wheels on.
From memory, against a GPS unit, when doing 100, the GPS reads 103, and at 110 it was about 115.
It might've ended up being way more trouble and worry than it would've been worth to have recalibrated the speedo, the tyre size (225/35/19) isn't that different to the standard sizes (215/50/16 and 215/45/17 I believe). Mark, pcperfection also had 19's on his and I don't think he made any calibration changes either.
Dan