37s or 35s?

[rpres62]

Hey Guys, I am new to the Jeep family. I just purchased a gladiator High Altitude addition and I want to beef it up. This gladiator is strictly a street gladiator with the occasional camping trip. I have a 20x12 XD wheel with an offset of -44. I am doing a 3.5 inch lift. What tire size should I be looking at….35s or 37s? Any help would be much appreciated

I have both if its your dd 35’s

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[TJDave]

I went with 35's at 1 day old just because I had leftovers from the JK sitting at the house.
I knew I wanted 37's before I bought it. JT's just look right with 37's. My biased opinion.
Weight matters. A couple of the lightest 37" tires out there are BFG AT's and Mastercraft Courser MXT. They are lighter than a lot of 35's. I went with the MXTs.
I'm also in the "more tire, less wheel" club. Better off-road while aired down. 17's for me.

35's

37's

 

[Jeeperjamie]

I went with 35's at 1 day old just because I had leftovers from the JK sitting at the house.
I knew I wanted 37's before I bought it. JT's just look right with 37's. My biased opinion.
Weight matters. A couple of the lightest 37" tires out there are BFG AT's and Mastercraft Courser MXT. They are lighter than a lot of 35's. I went with the MXTs.
I'm also in the "more tire, less wheel" club. Better off-road while aired down. 17's for me.

35's

37's

MasterCraft courser 37's on the horizon for me as well as soon as I can wear these Goodyear's out.

 

[BuckSawLilandtheGoose]

Hey Guys, I am new to the Jeep family. I just purchased a gladiator High Altitude addition and I want to beef it up. This gladiator is strictly a street gladiator with the occasional camping trip. I have a 20x12 XD wheel with an offset of -44. I am doing a 3.5 inch lift. What tire size should I be looking at….35s or 37s? Any help would be much appreciated

If you're debating between 35 and 37 just get 37 because you will regret not getting them.

 

[Kindafearless]

If you are doing a 3.5 inch lift, you will want the bigger tires. 35s fit on a stock gladiator. 3.5 inches is a lot of lift and the Gladiator eats tires (tires look small on it).

Since it is a street gladiator, try to go with the lightest tires you can find. You are already doing a heavy setup since you are going with 20 inch wheels. Lots of options out there and threads discussing light weight setups if you search for it.

 

[DocMike]

I'm seeing 16.5 with my 35s and 3.73. I keep my foot out of it. A LOT. 4.88 will be a game changer for me. I have 17s with a -18 offset. I also went 11.5x35 instead of a 12.5. At your altitude you could probably live with 3.73 and 35s.

I have 37's on my Base Sports Max Tow, haven't had any issues with rubbing. Personally I wouldn't have went 20" on your wheels and would of kept a 17 or 18 and went more tire less wheel. If you have 3.73 gears and go 37 your going be averaging about 14 to 15 mpg on your gas especially with the 20's on there. Mine has about 3-1/4 inches of lift total and I'm running my stock wheels. I had 35's on mine for a year and then found some used to 37's that had about 75% life left on them for $500. I figured I'd do that and make sure that's what I wanted before I spent the money on a new set. If your set on 37's your probably not going to be happy with 35's but be prepared for the performance hit once you go to 37's, it's going to be a dog with 3.73 gears. Pictures of mine for reference

On 35's

On 37's

I was getting around 18.7 average MPGs on the 35's and I'm getting around 17.2 average MPGs on the 37's. Keep in mind I have 4.10 gears as well. Your going to get less with either size with 3.73 gears.

As far as upgrading ball joints or anything like that, I ran 37's and 35's on my JKU with the stock ball joints and I got 121,000 miles out of them before I needed to change them out. Probably 40,000 miles of that was on 37's and the rest on 35's. I'll keep my stock ones on the jeep and see what happens with the JT but I've been told they are stouter than the JKs were. If I get 100,000+ out of these I'll put stock ones back on when they were out.

 

[Gliebig]

I went with 35's at 1 day old just because I had leftovers from the JK sitting at the house.
I knew I wanted 37's before I bought it. JT's just look right with 37's. My biased opinion.
Weight matters. A couple of the lightest 37" tires out there are BFG AT's and Mastercraft Courser MXT. They are lighter than a lot of 35's. I went with the MXTs.
I'm also in the "more tire, less wheel" club. Better off-road while aired down. 17's for me.

35's

37's

Any idea how tall these measure mounted? Taller than KO2s?

 

[TJDave]

Any idea how tall these measure mounted? Taller than KO2s?

Yes. From Tiresize.com 37x12.5x17
BFG KO2: 36.5" diameter
Mastercraft Courser MXT: 36.69"

 

[Gliebig]

I went with 35's at 1 day old just because I had leftovers from the JK sitting at the house.
I knew I wanted 37's before I bought it. JT's just look right with 37's. My biased opinion.
Weight matters. A couple of the lightest 37" tires out there are BFG AT's and Mastercraft Courser MXT. They are lighter than a lot of 35's. I went with the MXTs.
I'm also in the "more tire, less wheel" club. Better off-road while aired down. 17's for me.

35's

37's

Were you able to fit a 37 Mastercraft as a spare? About to order 4 or 5 depending.
Thanks

 

[TJDave]

Were you able to fit a 37 Mastercraft as a spare? About to order 4 or 5 depending.
Thanks

The 37" Mastercraft fits up there, but not inbetween the frame rails, so it hangs down pretty low. It is now sitting in the bed since the last wheeling trip. I am weighing my options: Maybe a different brand of spare or a 35.

 

[Gliebig]

The 37" Mastercraft fits up there, but not inbetween the frame rails, so it hangs down pretty low. It is now sitting in the bed since the last wheeling trip. I am weighing my options: Maybe a different brand of spare or a 35.

Thanks

 

[Aonarch]

4.10s with 35s is fine, not perfect, 8th gear is only good for flat cruising at moderate speeds. In a perfect world I'd like 4.56s with 35s, like the Xtreme Recon comes with. But for me, since I have a Max Tow with factory 4.10s, the 35s work well enough.

37s? Yeah you are going to want to regear if you have the Pentastar. Probably 4.88s or better yet 5.13s. Anyone who says otherwise probably lives in Florida, or never drives above 65 mph, or just flat out doesn't care about ruining drivability and mpg.

 

[Jeeperjamie]

4.10s with 35s is fine, not perfect, 8th gear is only good for flat cruising at moderate speeds. In a perfect world I'd like 4.56s with 35s, like the Xtreme Recon comes with. But for me, since I have a Max Tow with factory 4.10s, the 35s work well enough.

37s? Yeah you are going to want to regear if you have the Pentastar. Probably 4.88s or better yet 5.13s. Anyone who says otherwise probably lives in Florida, or never drives above 65 mph, or just flat out doesn't care about ruining drivability and mpg.

It all depends on which 37's you go with. The heavier the worse MPGs your going to get. Max Tow gets 17.2 to 17.5 MPGs on 37 12.5 17 Kanati trail hogs and did the same on Goodyear MTRs in the same size. Both tires weigh 72lbs and 73lbs. We got 18.1 on our trip to the beach 2 weeks ago. That's good enough for me. Speedo is dead on in the video and I live a hour and half from the Smokey Mountains so it's rolling hills here. Haven't reset the speedo since I put the Goodyear's on in Feb.

 

[Gliebig]

The 37" Mastercraft fits up there, but not inbetween the frame rails, so it hangs down pretty low. It is now sitting in the bed since the last wheeling trip. I am weighing my options: Maybe a different brand of spare or a 35.

Just curious. Have you tried it with the Clayton track bar?

 

[TJDave]

Just curious. Have you tried it with the Clayton track bar?

No I haven't. Still with stock track bar. About a half inch or so of clearance. The Clayton trackbar would increase that half inch clearance, but I would still have the same problem fitting this tire in-between the frame rails.

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