Inquiring Minds want to know about tires

[Renegade]

Casey250 just uploaded a new video of his diesel JL with 37s on the dyno. He had previously dyno’d it with stock tires, at 363 ft/lbs of rear wheel torque. With 37s his JL put down 342 ft/lbs of torque!! For reference, a 3.6 JLR typically puts down around 202 ft/lbs of torque at the wheels.

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[WhatExit?]

Everyone says 37’s but a lot of them end up complaining how they lost 8th gear, have sluggish acceleration, and so on...imo 34s or 35s are just fine. Cost effective, look great, and will get the job done with what ever your doing with out making the jeep look like an awkward mall crawler.

Good opinion. For you.

34's or 35's (220, 221 whatever it takes) may be fine for you but if you go off roading you'll appreciate the difference 37's make with a nice lift (like my 3.5" Metal Cloak Gamechanger lift). And re-gearing will make the Gladiator perform like a factory JEEP and that's what it takes to do it right.

Enjoy your 34's/35's on your "awkward mall crawler"

 

[Tall Mike]

So there isn't enough torque with the diesel to turn 37's with 3.73's under it ???

Curious how many of you have ever driven a diesel of any kind ?

 

[wannajeep]

If it was me, which it isn't, I'd just get to know the vehicle in its stock configuration for about 3 months before making any changes. At that point you'll be far better informed about its capabilities and what gears might be required for a given change in tire size.

 

[Phljeeper]

37s and larger aren't for everyone but for my personal use case the 35s with the long wheelbase had me tearing up the underside of the truck on trails at Rausch Creek which is covered in big rocks. I just upgraded to 37s and a little taller lift (3.5") and it made all the difference in the world. I can now keep up with buddies in 2 doors with 35s on black and red trails with significantly less bottom scraping.

When adding 37" or larger tires you do create some added challenges:

1. Need a larger lift with more components including control arms (minimum lower fronts), track bars (front and rear suggested)
2. You may need a new front driveshaft - you can go with stock for a while but will probably need a new one at some point
3. On 37s, if you are on 3.73 gearing you will see sluggish performance. 4.10s are ok but all will struggle towing a heavy load. A gear upgrade is likely in your future

But in my opinion all this is worth the performance, look and feel of the big tire. The Gladiator looks perfect with a big lift and 37"+ tires.

 

[Renegade]

So there isn't enough torque with the diesel to turn 37's with 3.73's under it ???

Curious how many of you have ever driven a diesel of any kind ?

There’s plenty, as evidenced by Casey250’s JL on the street, trail, and on the dyno.

 

[Tall Mike]

There’s plenty, as evidenced by Casey250’s JL on the street, trail, and on the dyno.

I would think so......

I have not driven the Jeep diesel yet.

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