Are you talking about diameter or radius?

Are my tyres 60mm greater diameter than yours?

We didn't measure those....

Mike

By using that site: http://www.alloywheels.com/tyrecalc.asp

I quoted the diameter difference. Which is what we would have measured from the ground up.

So in diameter mine is 24.9mm lower than standard and yours is 7.6mm higher than a standard Yeti. So in total my car is 32.5mm lower than yours.

Don't forget that the diameter is across both sides of the tyre,so your ride height difference should be 16.25 compared to mike's,not 32.5.........

I quoted the diameter difference. Which is what we would have measured from the ground up.

Did we?

We measured the radius difference and the height between the centre of the wheel and the wheel arch. It's just that we added them together......without measuring them separately.

In theory, the height from the centre of the wheel to the top of the wheel arch should be identical, assuming the cars are loaded the same. That does not vary, whether you have a 10" wheel or a 216/60 R16 wheel.

Wheel-size.pdf

Hope these ramblings make sense.

Mike

Added .pdf which it wouldn't let me do earlier.

Edited 1 February, 201115 yr by rockhopper

Did we?

We measured the radius difference and the height between the centre of the wheel and the wheel arch. It's just that we added them together......without measuring them separately.

In theory, the height from the centre of the wheel to the top of the wheel arch should be identical, assuming the cars are loaded the same. That does not vary, whether you have a 10" wheel or a 216/60 R16 wheel.

Wheel-size.pdf

Hope these ramblings make sense.

Mike

They do make sense. From the middle of the wheel to the wheelarch is suspension dependent and thus the same on all cars.

And yes if the diameter difference is 32,5mm it only has an influence in one direction. Doh on my part. So it should be only 16.25mm. Which does NOT explain our findings looking at the actual cars!

Ah just saw your sketch. That explains it as we now both said.

Edited 1 February, 201115 yr by 900000

I have just done a very rough measurement of my tyres.

The ones in dark storage 225/50 R17 are approx. 655mm dia.

My 215/60 R16's are approx. 665mm dia. These are on Elsie and measured horizontally so I didn't take the squish of the tyre (technical term)

Which is about what they are supposed to be.

Mike