Hi. I changed my tyres and rims overnight and i am curious to know how much the speedo would be off now. I called mechanics who got me to call a place to calibrate the speedo but they wouldnt give me any rough answers. And i hate how they wont tell you anything even estimates or guesses. So im hoping someone on here could help? Basically; old tyres were 192 65 14s and newies are 235 45 17s I worked out about 55mm difference in diameter, assuming my speedo was okay to begin with, can anyone give me an estimate of how far the speedo could be off now? If its like 2-5km/h i dont care, but if its gonna be like 10+ i wanna get it fixed, but the guy wouldnt tell me anything. Anyone have any idea? I dunno if it matters but the car is a vl not a 300. Im unsure of stock tyre /rim size but my old rims werent stock. Thanks to anyone who helps.
Go to the tech section, in wheels and tyre calcuator there is a calc. that will tell you the diff in your speedo.
I got the tyre size table and rpm or the tyres But i dont know where to apply that to and how to work it out?
