my spare is 235/75/16 my tires are 32x11.5 x 15 whats the dangers of using my spare?

 

As long as you have open differentials and not lockers , you may just experience the truck pulling a little to one side.
Also , on the rear , the shorter tire will be the drive wheel.
Do not run an odd tire in 4WD on pavement , You'll damage the drivetrain.

 

shouldnt be any different than having a doughnut tire haha

 

It is the diameter of the tire that is important. The tires on your 16" wheels have a theoretical diameter of 30" and are sorter than your 32" tires. You can use it as a spare but you should not drive with it for a long distance on an axle with a differential. It is worse if that differential has a L/S differential because you will cause accelerated wear on the L/S differential. If the differential has a locker you will cause accelerated wear on the locker.

 

So do you want the spare as the wheel that provides power or does it not matter?

 

With an open diff it shouldn't matter too much, but with an LS if the spare is smaller in diameter, you should put the spare on the front (and not use 4x4)
So, if you get a flat on a rear tire, you put the spare on the front and move the good front tire to replace the flat on the rear.
It's a little extra effort, but it will save your diff.

 

what they all said .... one of my dads buddies lost a diff cause he blew 2 33s up and all that was left was a 31 off someone elses rig.

 

well if its the rear that gets a flat take the front tire off and stick it in the back and use the spare up front

 

Find a cheap tire that matches.

 

OK, well I have triple A... and at the moment carry NO tools on board.... its complicated...

anyways,. I have ALWAYS heard that tire size wasnt as important as wheel size when it comes to spare tires... and that you should NEVER use a different wheel size spare...

why is this.. ? I am curious to know... my question applies to cars as well...

My tow package thru AAA will tow me 100 miles for a flat... after that I am on my own.

 

Wheel size makes no difference, as long as it clears the brake caliper, Outer circumference matters the most.

 

its not complicated get some ****in tools and a spare that matches if your spare is that far off from your stock tire size, problem solved

 

problem is I no longer have stock wheels/tires on my truck... though I still have my stock spare...Just curious if it would work is all. Question was answered... and as far as tools? LOL!