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2WD tire width question in the rear, couldn't find it in the search.


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So I'm running some ideas through my head about building up my 2WD as a fun sporty truck to run around in.  To support a V8 swap or other power increase option, I want to have some good size tires in the rear.   But how wide can I go before I start sticking out of the wheel well?  I know I can tub the rear and put in some pretty massive tires but I don't want to do that much work.  And I don't care about actually going to a track and competing.  But it would be nice to make some use of the power on the street.

 

So if I pick the right wheel with the right offset to get the rear tire very close to the frame/spring on the inside, how wide can I go before I get out from under the fender flare?

 

Assume for the sake of argument that the tire diameter will stay close to stock.  The only change would be the width.

 

Front tires will probably stay at or near stock size because they fit and work just fine.  And I'm not trying to turn this into a race truck in any way.

 

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you've got quite a bit to play with. :L:   MJs have a fat butt.  the rear axle is the same width as XJs, but the bed is wider than the back of an XJ and so the tires look tucked-in all the time.  :(

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I have 285’s on the rear of mine and they still sit inside the edge of the flare. There is still some room to go wider but there are not many tire choices in 295, or 305 width, and 315’s may be pushing it. I have off the shelf mustang wheels and everything fits really well. I have all the specs in my build thread. What I would recommend is a 275 because of the amount of tire choices available in a bunch of heights and wheel diameters. 

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I run BFG radial t/a’s on my 2wd daily driver xj. 255/60 front 275/60 rear. On 15x7 zj Laredo rims, the fronts are even with the flare and the tears about an inch under the flares. MJs you’d have probably 2” covered but with a 1+” spacer in the back you could reduce that. 

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1 hour ago, jeeptruck636 said:

I have 285’s on the rear of mine and they still sit inside the edge of the flare. There is still some room to go wider but there are not many tire choices in 295, or 305 width, and 315’s may be pushing it. I have off the shelf mustang wheels and everything fits really well. I have all the specs in my build thread. What I would recommend is a 275 because of the amount of tire choices available in a bunch of heights and wheel diameters. 

I was looking at 275s for the rear.  That seems like a popular width.

 

Thanks everyone for the info.

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I'm probably going to end up with a set of aftermarket wheels.   Still probably 15" rims because big wheels on old trucks just look... weird.

 

We'll see.  I'll probably change my mind a dozen times before I get a chance to get started.

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Sorry for the possibly stupid question/statement,  BUT.

 

What is the point of big rear drive tires when the entire truck is nose heavy?  I don't see the traction at the rear wheels.  Granted, wide tires may make a bad/poor weight bais a little better.  But is it really worth the expense?  Or do we just toss 500 lbs in the bed to improve the weight distribution?

 

BTW,  my Comanche TDI weighs 3020 lbs with a full 23 gallons of diesel.  The 91 4.0 was about 3600 lbs with a full load of 23 gallons of gas.

 

 

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