BFG KO 37’s and 315’s

[Jteakus]

Threw my 37’s that normally live on JT on the JL for a trip to Moab. Snapped a few pics while I was swapping them back for anyone searching in future. Trip was fantastic.

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[Medical_Bartender]

Jealous of your Moab trip!! Great place, great photos, and I'm digging your JL! No spare hanging off the back really makes it look pretty squat and nimble.

I'll never understand the KO2 measurement thing. I get that tire size with change a bit here and there with PSI, weight, etc...but it almost seems like false advertising. I've got KO2s on both of my rigs though. Love them. Thanks for the comparison.

 

[Zachanadandy]

Jealous of your Moab trip!! Great place, great photos, and I'm digging your JL! No spare hanging off the back really makes it look pretty squat and nimble.

I'll never understand the KO2 measurement thing. I get that tire size with change a bit here and there with PSI, weight, etc...but it almost seems like false advertising. I've got KO2s on both of my rigs though. Love them. Thanks for the comparison.

BFGs run small for the size, but I don't think any tire I've ever owned was true to size under vehicle weight. It's like pants sizes. Actually measure those 34s you feel good about fitting in to, your waist isn't as small as those pants tell you it is.

 

[Bjeepz]

I just put Cooper AT3 XLT 37’s on my Gladiator and they measured about 35.25 - 35.5 at 35 psi under the weight of the Jeep. No 37 is going to measure 37 under the rig with proper inflation.

 

[JTGuy]

I went from 315s to the 37s in BFG KO2 and I feel that the 37s are a better tire in many ways over the 315s. I did re gear to 4.88s.

 

[Jteakus]

The JL will for sure be wearing 37 KO2's as soon as the 315's wear out. Problem is the first set lasted 62K miles. They ride so much better than the 315's and I only lost one mpg while they were on. I hated to pull them off but the JT is sitting on stockers right now.

 

[Ggrip]

I went from 315s to the 37s in BFG KO2 and I feel that the 37s are a better tire in many ways over the 315s. I did re gear to 4.88s.

How much did re gear cost roughly?

 

[JTGuy]

Dana Spicer gears about 1900 as I recall.

 

[Toyfrog]

The JL will for sure be wearing 37 KO2's as soon as the 315's wear out. Problem is the first set lasted 62K miles. They ride so much better than the 315's and I only lost one mpg while they were on. I hated to pull them off but the JT is sitting on stockers right now.

Got 315’s on now and will be going to 37’s hopefully in the next few months. Just curious why the 37’s ride better? My 315’s are load range c and will be going with the same in 37’s.

 

[Jteakus]

I think it has to do with the sidewall height, absorbs the road bumps better. They also drove better on the JL than the 315's do. I attribute that to them being in the beadlock position which makes the wheel wider with less crown on the tire than the 315's have.

 

[Toyfrog]

I think it has to do with the sidewall height, absorbs the road bumps better. They also drove better on the JL than the 315's do. I attribute that to them being in the beadlock position which makes the wheel wider with less crown on the tire than the 315's have.

I’ve always loved the KO2’s had them on previous Tacos and was a no brainer for the Mojave. Always had good luck and the wear pretty even when you keep them rotated. Looked at Discount about the KO3’s and shows a release date of 2026 for the 37’s ? WTF ?

 

[JTGuy]

The 37s have a narrower tread that makes the sidewall a little rounder and it flexes easier. The 315s are wider and the sidewall is straight making for a stiffer ride. I am glad I gave my 315s to a friend and did not wait for them to wear out.

 

[dayusmc]

The JL will for sure be wearing 37 KO2's as soon as the 315's wear out. Problem is the first set lasted 62K miles. They ride so much better than the 315's and I only lost one mpg while they were on. I hated to pull them off but the JT is sitting on stockers right now.

What psi are you running the 315's at on the JL? I have them on my wife's JL, but not sure what to run them at...

 

[Jteakus]

What psi are you running the 315's at on the JL? I have them on my wife's JL, but not sure what to run them at...

My 315's are on Mopar beadlock wheels in non lock position on JL, 17x8. It is a diesel with a winch so heavy in front, I have a VKS rear bumper, no spare in rear. I run 33 psi front and 32 rear. This seems to be the best compromise between tire wear, comfort and mileage.

 

[Jteakus]

My wife daily drives the JL to work, M-F with an 84 mi round trip. She knocks down 27 mpg and I got 62K miles out of last set of BFG KO2"s. Could have gotten more but they needed a rebalance and I figured I got my money out of them. I rotate every 2,500 miles.

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