Get 4 New 37's, Keep Using Factory 33 Spare?

[guntrust]

People. When buying tires, buy five of them in the same size.
Don’t cheap out on the thing that connects your vehicle to the ground.

If that means you have to wait and save up longer to buy five tires then do so.

It's not simply a matter of saving money. If it were, I would completely agree, just stick a 37 in the spare tire well. (Mounting in bed is not an option, for several reasons.)

But it's more complicated than that.

I still haven't seen a list of smallish 37's that dependably fit without any mods, or major deflation. (I only carry an air pump while offroading.)

I know there is a thread purporting to list 37's that fit, but on reviewing that thread it seems to be a rather chaotic collection of incomplete tidbits. Jeepers will post that their whatevers fit, usually without noting if they swapped track bars, modified heat shield, or shaved trailer hitch thing (not even sure how to do that, or whether that would be safe).

Some say curved/adjustable track bar may be not as strong, others say you need one of those if you have a lift....

I wish there were a pure list of 37'' tire models that fit without any modification whatsoever, and without deflation below what is safe for driving on freeway to the next air station, but i don't think that list exists.

Sponsored

 

[gladtohave]

I would at least get a used 37 to put on the steely for the spare . Guess it all depends on what you want . You asked the question here but you already know a 33 spare for a 37 setup is less than ideal .

 

[guntrust]

I would at least get a used 37 to put on the steely for the spare . Guess it all depends on what you want . You asked the question here but you already know a 33 spare for a 37 setup is less than ideal .

That is another variable worth looking into.

If i find a narrow 37 to fit the 33 "steely" or stock rim that came with spare, is it more likely to fit in the well? Seems like that would not help, unless the wheel itself is smaller in diameter (smaller than 17). Problem in fitting seems to be purely the 37" diameter, putting aside trail clearance issues.

That being the case, I would rather spend the extra money on fifth identical 37 that i can rotate.

Just not sure what 37's will fit, and what exact mods will be required.

 

[bleda2002]

That is another variable worth looking into.

If i find a narrow 37 to fit the 33 "steely" or stock rim that came with spare, is it more likely to fit in the well? Seems like that would not help, unless the wheel itself is smaller in diameter (smaller than 17). Problem in fitting seems to be purely the 37" diameter, putting aside trail clearance issues.

That being the case, I would rather spend the extra money on fifth identical 37 that i can rotate.

Just not sure what 37's will fit, and what exact mods will be required.

Pretty much any 37 will fit, just not between the frame rails it will hang down a bit. Get the clayton or metal cloak track bar to clear the track bar, and crank it up there tight. Its not rocket surgery on this honestly unless you're trying to shove it between the frame rails which will basically be none of them unless its a ko2 deflated and then with a ratchet strap to squeeze it.

 

[AstroZombie]

I would like to get five, but my dealer told me they could not put any 37 in spare well, only max 35. Not sure why they are saying that, maybe going larger requires the track bar mod?

The track bar is in the way and maybe a heat shield. Put teh spare in teh bed until you can make room for it. The dealer is installing tires? That can't be cheap LOL

 

[Russ2023]

Personally I’d never consider having a spare of unequal size to the others. Aside from always hearing that’s a terrible approach but sounds like a potential recipe for disaster to me.

 

[HooliganActual]

But it's more complicated than that.

I know it seems complicated but it really isn't. I've yet to hear many, if any, people on here say that whatever 37 they bought doesn't fit.
I'm not throwing shade, but you may be overthinking it a bit.

Colin Powell had a quote that went something like "make your decision with 80% of the information. If you wait for 100% of the information, you'll be waiting forever." BTW, I have the quote somewhere on my phone but am too lazy to find it...

37's that dependably fit without any mods, or major deflation. (I only carry an air pump while offroading.)

Could you just carry your air pump all the time? I mean it's not like we are adding the complication of not owning an air pump. Buy the 37 you want, deflate it to fit, put pump under back seat until needed.

Another thought along the same line, My Toyo R/T's have a "D" load rating. If I have a flat and have to use the spare and my onboard air pump doesn't work to fill it up, that tire can support my Gladiator with 20# in it until I get to an air pump.

I know there is a thread purporting to list 37's that fit, but on reviewing that thread it seems to be a rather chaotic collection of incomplete tidbits.

I agree that any "list" I've seen here or on other sites are disorganized. Here's an elegant solution: since you are already planning on 37's, buy them and have the tire shop attempt to place the first one they mount underneath before they put one on an axle. If it fits, then buy a fifth one (run the stock spare if a 5th has to be ordered and if you have a flat before the 5th one comes in, put the stock spare on passenger front.)

Just do it brother. I have a 2020 JTR, stock rear swaybar, 37" Toyo tucked underneath at 20#. Done and dusted. I spent less time making that decision that typing this post, lol.

 

[antwon412]

It's not simply a matter of saving money. If it were, I would completely agree, just stick a 37 in the spare tire well. (Mounting in bed is not an option, for several reasons.)

But it's more complicated than that.

I still haven't seen a list of smallish 37's that dependably fit without any mods, or major deflation. (I only carry an air pump while offroading.)

I know there is a thread purporting to list 37's that fit, but on reviewing that thread it seems to be a rather chaotic collection of incomplete tidbits. Jeepers will post that their whatevers fit, usually without noting if they swapped track bars, modified heat shield, or shaved trailer hitch thing (not even sure how to do that, or whether that would be safe).

Some say curved/adjustable track bar may be not as strong, others say you need one of those if you have a lift....

I wish there were a pure list of 37'' tire models that fit without any modification whatsoever, and without deflation below what is safe for driving on freeway to the next air station, but i don't think that list exists.

Here you go. Often times the easiest way is to simply enter the name of the forum here in Google with the text you’re looking for.

https://www.google.com/url?sa=t&rct...usg=AOvVaw1fQref85470fLGWxQQVEqf&opi=89978449

 

[KC_H]

You can use a 33 as a spare just fine. Just stay out of 4wd and put it passenger front, the front passenger is disconnected in 2wd thanks to the fad so you will just get some abs lights from the wheel speed sensors.

Yup, works just like the donut spare most cars have used for years... Just keep the speed down until you get the other repaired...

 

[hoosier]

My take is, If you're in a jam...you do what you gotta do. Just remember...that spare is a temporary fix. Treat it as such and make the proper repairs as quickly as possible. Don't wait.
I've seen quite a bit of damage done because someone decided to blow off the repair for extended periods. Nice rig BTW!

Very true and appreciate the compliment. Have a great day!

 

[Vtur]

No needs to over thinking this. Mine 37 measued 36.70" and 31psi fits with the Clayton trackbar with the bend. Yes, straight bar might be stronger but the Clayton bar is way beefier. And, don't worries about the fits between the frame, the sidewall should and supposed to makes contact and bottoming out with the upper support, way before the center tread of the tire meet the frame. Just make sure to cranking it up until it skips a few times.

A matching spare wheel/tire is ideal, especially when you're far from home.

 

[BunkieJeeper75]

I kept the spar on the stock wheel. The rest are on Method Beadgrips.

I guess the offset on stock wheel vs the Method wheels doesn’t matter for a spare? Stock wheel +44mm vs the wheels I’m looking at are -6mm.

 

[toddarama]

When I went to 37's I did 5 matching wheels and tires (KMC Trails and Baja Boss A/Ts). I have the Clayton trackbar so fit was not an issue. Returned from a day of wheeling yesterday and had a crushed valve stem. When I tried to put a hose on to air up the valve jammed and wouldn't hold any air...... sure glad I had the full size spare, and don't regret the extra $$$ I spent on the extra wheel and tire.

 

[Zachanadandy]

The donut spare that comes with nearly every car or suv these days wants to know why people on jeep forums think their difs are more fragile than a Honda civic? If you are worried about traction control, put it on the front in 2wd, pretty sure the traction control isn't trying to match the drive rate of undriven tires? Even if you believe your difs are extra sensitive, the front passenger tire is literally disconnected from the dif via the fad in 2wd. Even my old xj came with a donut spare, so no the solid axle doesn't make for some special use case. The only reason donut spares typically carry the 50mph and 50-100 mile limit is their cheap construction not the mismatch of sizes. Yes it will work as a spare.

 

[Lost_In_The_Woods]

I guess the offset on stock wheel vs the Method wheels doesn’t matter for a spare? Stock wheel +44mm vs the wheels I’m looking at are -6mm.

It definitely would matter to an extent. Eventually, I'll replace the spare wheel with something with the correct offset. Right now, worst case scenario, I would pull a rear tire put it on the front, and put the spare on the rear.

Sponsored