Will my spare tire still be useful?

[Michael Baker]

I can see that there are some interesting differences of opinion! Buying the same tire (and therefore wheel) for the spare is not such an easy option because of:

a) The extra cost
b) Possible changes in the mounting of the spare on the back of the car.

In my case I cannot mount my 37x13.5 R20 Nitto Mud Grappler on the frame at the back of the car without making some alterations. These alterations would then make it impossible to mount my current spare, which is the same as my every-day tires (LT325/60 R20 Nitto Terra Grappler).

Pardon my rookie ignorance, but is is not the case that, unless the difference in rotational speed causes the TC to think there is slip (and therefore applies brakes to the smaller wheel), the diff should compensate? Of course I will not be able to lock the center diff, or the rear diff....

[hmrlvr]

I think you need one of these

[Michael Baker]

What I have is this. I extended out the frame, and have a set of ramps and the highlift jack mounted between the frame and the liftgate.

[ASTAR]

I wouldn't run a stock tire with much of a difference in the tire size on the truck. It's a fulltime 4wd vehicle, can't be good for it. I have a safety seal plug kit (can repair almost anything) and factory onboard air. If I get a flat, unless its a big gash, I'll have it fixed and bac on the road in less time than it would take to change the tire.

[tomp]

Originally Posted by Michael Baker

What I have is this. I extended out the frame, and have a set of ramps and the highlift jack mounted between the frame and the liftgate.

MB, can you post some detailed pics of what you did in there? Sounds interesting...

[timgco]

Originally Posted by tomp

MB, can you post some detailed pics of what you did in there? Sounds interesting...

x2, what did you have to do to make the rim mount. What caused the rim not to mount? I guess I figured the rim would just bolt up there...my bad.
BTW- nice lookin rig.

[Michael Baker]

Detailed pics - will take some and put them up next week after I go back home this weekend.

[Cesardajr]

So im now running 37x12.50xR17 on factory wheels and myspare is still a
35x12.50xR17 also on a factory wheel, can i use my spare without having any problems or causing any damage to the diff?

[timgco]

Originally Posted by Michael Baker

I can see that there are some interesting differences of opinion! Buying the same tire (and therefore wheel) for the spare is not such an easy option because of:

a) The extra cost Are you kidding me? You can afford to buy a 60K truck and expensive rims/ tires but not a fifth?
b) Possible changes in the mounting of the spare on the back of the car.

There arer pleanty of people here that have their 20"/22" spare back there. What "alterations" do you have to do? If it's just the license plate, that's easy and takes less time to move your plate to the bumper with a new light than it does to go to the store and but the $5.00 light.

In my case I cannot mount my 37x13.5 R20 Nitto Mud Grappler on the frame at the back of the car without making some alterations. These alterations would then make it impossible to mount my current spare, which is the same as my every-day tires (LT325/60 R20 Nitto Terra Grappler).

Pardon my rookie ignorance, but is is not the case that, unless the difference in rotational speed causes the TC to think there is slip (and therefore applies brakes to the smaller wheel), the diff should compensate? Of course I will not be able to lock the center diff, or the rear diff....

Get the fifth tire/ wheel, you will ruin your truck.