One of the most common problems a change in your tire and wheel size can cause is an inaccurate speedometer. ... Because the tires rotate slower, the speedometer reads this as a lower speed. The faster your drive, the more your speedometer reading will be off. Your odometer will read lower, too.

How does wheel size affect speed?

A larger diameter means that the wheel will be heavier and consequently speed will be slightly compromised during acceleration (depending also on the torque of the car); ... Bigger wheels will also increase the maximum load of the car.

Do bigger rims make car faster?

tl;dr: No, larger wheels do not necessarily make a car faster. The wheel (and tire if mounted) is just a way to transfer the rotary action of the engine to the ground. All that making the wheels larger does is change the final overall drive ratio.