Tire blowout today - replace just one?

[Jivewalker]

coming back from a camping trip today and my rear passenger tire went dramatic flat at about 75mph. Runner handled great and got to the side and changed it out safely.

My question is, I have about 15k miles on these, just had them rotated, and wonder if I should replace both rears or just one? Worried about mechanical imbalance and premature wear if I don't. What say you? TIA

JiveWalker

 

[3wbdriver]

At that mileage point I would do both, but you'll get arguments for both ways. Or have them put the 15K tire on your spare wheel and put the spare on with one new tire.

 

[Jeremy556]

4runner has open diffs, so no problem replacing just one tire.

 

[thebwlife]

coming back from a camping trip today and my rear passenger tire went dramatic flat at about 75mph. Runner handled great and got to the side and changed it out safely.

My question is, I have about 15k miles on these, just had them rotated, and wonder if I should replace both rears or just one? Worried about mechanical imbalance and premature wear if I don't. What say you? TIA

JiveWalker

If the tire can be fixed just fix it. If not Swap the spare and pick up a used or super cheap new spare. The likely hood you'll loose two tire in 35-40k is pretty low.

 

[Jivewalker]

4runner has open diffs, so no problem replacing just one tire.

Thanks for the replies.

Is that long term mechanically safe? Are open differentials meant for constant variance or just when turning? I'm leaning toward replacing both.

My spare is full size original with no miles on it. Blown tire is M/S2 with ~15k on it.

 

[Jeremy556]

Thanks for the replies.

Is that long term mechanically safe? Are open differentials meant for constant variance or just when turning? I'm leaning toward replacing both.

My spare is full size original with no miles on it. Blown tire is M/S2 with ~15k on it.

Correct - the wheels can turn at different rates forever and the open diff won't ever care. Some limited slip diff designs cannot tolerate that, hence on some AWD vehicles, tires must be within a tight tolerance of overall diameter relative to each other.

 

[Jivewalker]

Correct - the wheels can turn at different rates forever and the open diff won't ever care. Some limited slip diff designs cannot tolerate that, hence on some AWD vehicles, tires must be within a tight tolerance of overall diameter relative to each other.

Perfect, should make life a little easier tomorrow!

 

[Ruski]

With an open diff you shouldn't have a problem. If memory serves me right on AWD vehicles the tires have to be within 4/32nds of each other. We don't have that problem :banana:

 

[bloodninja]

With an open diff you shouldn't have a problem. If memory serves me right on AWD vehicles the tires have to be within 4/32nds of each other. We don't have that problem :banana:

Because my knowledge of AWD systems is marginally better than that of 4WD, can someone clarify for me if this also applies to the FT-4WD on the Limited?

Will the center differential be substantially impacted by running a different size tire temporarily?

Scenario: Have 285s. Get flat. Swap stock 20" spare wheel. It'll be a bit lop-sided on the way to the shop. Or do I really need to get a 285 spare as well?

 

[RainCityShecks]

coming back from a camping trip today and my rear passenger tire went dramatic flat at about 75mph. Runner handled great and got to the side and changed it out safely.

My question is, I have about 15k miles on these, just had them rotated, and wonder if I should replace both rears or just one? Worried about mechanical imbalance and premature wear if I don't. What say you? TIA

JiveWalker

I blew out a tire w/ about 8K I think - replaced just one. That's what I'd do in your situation as well.

 

[Friggin Idiot]

You could check out the for sale section, there's always people dumping Duelers there!

I blew a tire at about 22k. I had a local shop move the matching Dueler off of the spare to the good wheel with TPMS. A couple weeks later I replaced the spare with a KO2 275. Then at 30k (2 weeks ago) I replaced the 4 Duelers with matching KO2 275's.

 

[FrontRange4Runner]

Because my knowledge of AWD systems is marginally better than that of 4WD, can someone clarify for me if this also applies to the FT-4WD on the Limited?

Will the center differential be substantially impacted by running a different size tire temporarily?

Scenario: Have 285s. Get flat. Swap stock 20" spare wheel. It'll be a bit lop-sided on the way to the shop. Or do I really need to get a 285 spare as well?

Probably depends on how far you have to go. That said, If tire size differences will destroy your diffs, the manual will be very specific about it. So RTFM I guess lol

 

[77Bronc]

Thanks for the replies.

Is that long term mechanically safe? Are open differentials meant for constant variance or just when turning? I'm leaning toward replacing both.

My spare is full size original with no miles on it. Blown tire is M/S2 with ~15k on it.

Agreed, go with two new tires, you are almost at 50% expected tread life. If the mileage was 20K, I would replace all 4, that is just me.

I have never put the spare into normal rotation, maintained spare by removing, checking air, cleaning and coating with a quality silicone spray.

77

 

[Donovan1]

If you put the current opposite good tire on as a spare and buy two tires, you could it theory also buy a 5th wheel to match what you have on the truck. I do a 5 tire rotation on the FJ and I really do get a lot more mileage out of a set. If the expected life span is say 40K miles (I replace at about 50%-25% anyway) I can get about 55K out of the set before I replace all 5. It doesn't make each tire last longer as mileage is mileage, but it longer between replacing sets and I always have a real spare rather than a doughnut or the original terrible spare dangling under there.

 

[Donovan1]

You have the original tires?? I have a set that had about 50 miles on them sitting in the garage taking up space. Want some tires??

 

[1engineer]

If you put the current opposite good tire on as a spare and buy two tires, you could it theory also buy a 5th wheel to match what you have on the truck. I do a 5 tire rotation on the FJ and I really do get a lot more mileage out of a set. If the expected life span is say 40K miles (I replace at about 50%-25% anyway) I can get about 55K out of the set before I replace all 5. It doesn't make each tire last longer as mileage is mileage, but it longer between replacing sets and I always have a real spare rather than a doughnut or the original terrible spare dangling under there.

http://www.toyota-4runner.org/5th-gen-t4rs/130567-5-vs-4-tire-rotation.html

 

[Donovan1]

http://www.toyota-4runner.org/5th-gen-t4rs/130567-5-vs-4-tire-rotation.html

That's cool. But I also stated that you don't really save anything but time between new sets. Each tire is going to get the same ultimate mileage as it would regardless of the length of time you use it. You want me to work out the math on $1000 sitting in the bank for a year at say 3% interest?

I get a little more mileage than your estimations, and I realize they are estimations, and I don't have a 8 year old rock hard spare tire hanging under the truck either. I want to say I get closer to 60K on a 40K mile set, and I usually pull them at 50% or a little less which seems to ALWAYS be right at the beginning of winter... I also rotate mine a little more often which may factor into longevity too.

I still feel it's a good way to go if you have 5 tires with wheels. This is on my FJ where I wasn't one of those cheapskates that has 4 big expensive wheel/tires and the stock anemic spare hanging off the rear end still.

 

[Jivewalker]

Toyota tech said fine just replacing one with current wear. No I don't have original tires, although the du flops did last me 70k and I was happy with them unlike others. I have ltx m/s2s on now with 15k on them. At any rate , I think the tread depth difference old to new is only about 1 or 2/32. All good, except I'm out the $$ for the tire and road force, but safe and runner did well in the situation.