bigger tires
 

I have a ele club car ,with 8 inche tires it will do 19 .2 mph............soooo if I put on 10 inche tires will I go 22-23 mph??? I know someone has done this. thanks:gc::gc::gc:

about 2 mph faster

That means at 60 miles per hour you could be two miles further.

The math would suggest saving your money!

First off the inside hole means nothing
here is a speed calculator that will answer your question
SPEED CALCULATOR

I've installed over 600 speedometers on carts here in the Villages and have observed the following:
If you switch to 205 65-10 tires you will increase your speed by approximately 2.5 mph. If you buy 205 50-10 tires you will not see any speed increase.

your speed on your speedometer is based on rotation of tire - when you change the size of the tire - the speed on the speedometer changes - NOT the speed of the cart - you are not going any faster - just your speedometer is no longer accurate!

bigger tires
 

The mph speed will increase because the effective distance covered will be greater at the same engine RPM than as a smaller diameter tire.

The speed of the tire rotation is determined by engine RPM. That would not change by increasing tire/wheel size. However, the actual speed of the cart will increase. Thereby making the speedometer give you a false low reading. Still reads 20mph, but now traveling 22mph.

This was an important thing to remember when we all put larger tires on our cars back in the 70's. You might get a speeding ticket because you are going faster than you think.

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Yes, the speedometer must be re-calibrated to the larger tire size otherwise it will not display your true speed. This is easy to do on all digital speedometers. Determine the circumference of the larger tires and enter the value into the tire size section of the speedometer.

bigger tires
 

Actually, the rotational speed of the tire will increase with a larger tire given the same RPM as the smaller tire. Your 70's car showed a false mph because the speedo gear was driven off the tranny.

If you have a smart phone you can check your cart speedometer with your phone's GPS speedometer to see how accurate it is. Yes there is an free APP for a GPS speedometer.

In my world, going from 20 mph to 22 mph also means two mile farther.

My house came with a Par Car with 8 inch tires. Top speed was 17.5 with no way to make it faster until I put 10 inch tires on the back. Picked up 2 mph. Ciearance kept me from changing the front tires to 10 inch, but it rides just fine the way it is. Found matching hubcaps for both sizes.

If the tire RPM stays the same, then wouldn't actual speed change be a function Pi *D.

3.14* 10/3.14* 8 ?