View Full Version : Different dia spares

6th January 2009, 10:01 AM
HI, I was wondering if anyone knows of any problems I might have with tyre diameter of my spares ( wanglers 763mm ), being used with larger diameter(LTZ 799mm) on the car.
Cheers Ken

6th January 2009, 03:02 PM
You might find your traction control kicking in very early. Only way to know is to put em on and try.

6th January 2009, 03:33 PM
I wouldnt be trying it. (especially in something as complex as a D3) It may well cause transmission wind up or worse.

The larger tyre has a rolling diamater of 2510mm

the smaller has a rolling diamater of 2397mm

So in 1 KM the larger one will spin 398.4 times

The smaller one will spin 417 times.

Thats quite a big difference...

6th January 2009, 03:40 PM
If you have air suspension you will log fault codes and possibly cause limp home mode to come on.

6th January 2009, 07:14 PM
I suppose it depends how far you drive with it on and whether it is on tar.

7th January 2009, 12:48 PM
Don't risk it. As BigJon says, it can cause suspension problems (and all sorts of other strange faults that can have repairers scratching their heads).