Different Size Tires...

[Capman2k]

Okie dokie... Today, I noticed that my right front tire, which has been very worn out for a while, was worn to the point that the threads underneath were showing

SO, I whipped out the jack and threw on my spare tire... I'm kind of on the broke side, or I would just go out and buy another tire... Anywho, I noticed that my spare tire is not only a different brand, but a different size...

Whatever numbnuts before me decided to put smaller tires on the Jeep (215's) and didn't bother to replace the spare also... So I have three 215's and a 225... I took it to Ray to get the lugnuts torqued properly, and he said to simply not put my Jeep into 4wd... Problem is, it has the full-time 4x4... He just laughed and that was that... What can I expect to break in the near future with my different size tires?

 

[fatbob]

Go here ,http://4lo.com/calc/gearmetric.htm
and compare the two tire sizes. I found only about .5 inch difference if the tires are both xxx/70r15.
You also dont say if you have lockers or not, so without more info, I would suggest running the different sized tires on the front axle. I don't think you will have any problems at all with it on the front, unlocked
good luck
Bob

 

[trailblazr81]

I think its close enough you'll be OK... run it in front. What vehicle is this? Is it a standard full time 4 wheel drive or that new fancy "thing thinks its smarter than me" and detects what it thinks is wheel spin and routes power to a different whel and/or applies brakes?
I hate technology... well except for limited slips that turn into lockers with a flip of a switch...

 

[mikey_d05]

If it's plain full time 4wd you should be alright. If it's Quadratrac or their fancy automatic limited slip/braking thingy you might have problems.

 

[Capman2k]

It's the Quadratrac... I assume I don't have lockers since this Jeep is completely stock other than the midget tires someone put on there

My understanding of Quadratrac is it's one of those "thinks it's smarter than me" systems, if I'm not mistaken...

 

[trailblazr81]

I still say it should be OK. If its only a half inch smaller. And if it has full tread while your other tire is worn its pretty close.

 

[sweetk30]

if open diffs then o.k. just will steer funny on the front.