Speedo Calibration

[wayz]

Hi guys, long time reader... (great forum!)

Ive just had 17" wheels put on the car (from the stock 14") and i think its put the speedo out of whack, anyone know where i can get the speedometer re-calibrated?

Dont want to stand there arguing with the boys in blue about how i WASN'T speeding

Cheers guys

[syncro]

Hi guys, long time reader... (great forum!)

Ive just had 17" wheels put on the car (from the stock 14") and i think its put the speedo out of whack, anyone know where i can get the speedometer re-calibrated?

Dont want to stand there arguing with the boys in blue about how i WASN'T speeding

Cheers guys

Check it first as it may be within limits.
They normally read about 5-10% fast.

[wayz]

How would i go about checking it? (forgive me ignorance )

i normally do about 550 nearly 600km a full tank and now im doing only 450 or so a tank? This happened immediately after i had changed the wheels. Would anything else be wrong?

[golf3]

Heavier wheels = more unsprung weight = more power required to make them/the car move = more petrol = more $$$

[wayz]

Arhh, yes.. i thought about that, but these wheels are actually lighter and the car feels like its driving with greater ease

[golf3]

Rolling diameter will be different every time you change tyres, even when still the stock size of 185/60R14. Tyres are all different. However, with 17's you should be running a 205/40R17 or similar to keep diameter to around the same...