I was at a reputable general automotive repair shop today and while waiting in the waiting area I watched a video on their TV screen that runs continuously thorghout the day. There was a warning about changing tire sizes and after I thought about it is likely to be true. I say this because I am a retired 36 year aircraft maintenance person and have had some dealings with anti-skid systems.

The warning was that the rolling diameter of a tire should not be change by more than 3% because the antiskid sensors will not be able to keep the tires from locking up on a panic stop. I did a few calculations and this pretty much means about one tire size larger or smaller- for example, a change from 275-65-18 changed upward to a 265-70-18 will result in a change from 100.8 inches to 104.2 inches.

Just a little FYI.

 

Correction on the above size example- I meant to say when changing from a 275-65-18 to 275-70-18 that there would be about the 3% difference.

 

All my trucks have tires that are nearly 2 times stock and all the ABS stuff works just fine.

 

As long as 4 tires are the same size it shouldn't matter.

 

For most vehicles as long as all 4 tires are the same size you will be ok. There is a problem with replacing just 1 tire on an all wheel drive vehicle. You would not want more then 3/32nds of an inch difference in the tire size. The system does not allow for more then that.