Tire Weight & Performance

[Alabama Mud Machine]

This might have been covered before, but I don’t see an answer on the Google machine, so figured I’d ask again...

My JTR came stock with the Falken Wildpeak M/T’s in 285/70r17... These tires are 32.9” tall (inflated) and weigh 63.3 lbs. each. With the 4.10’s, my JTR is fairly perky on the throttle (for a V6).

The 37x13.50r20 tires I’m looking at are about 36.54” tall (inflated), and weigh 78.17 lbs. each.

How much acceleration and passing-power will I lose by going up 14 lbs. per tire in weight and 3.5” in height, if I run them with stock 4.10 gears? The Jeep is still a lease, so right now I don’t want to regear, until it’s under a loan to buy when my lease is up. Trying to stick to only minimal off-road upgrades, and bolt-on only and nothing permanent or semi-permanent (gears, engine, trans, etc...) for right now.

Keep in mind Nitto Trail Grappler M/T’s in 37x13.50r20 weigh 91.8 lbs. each, as a comparison.

Can anyone give me some “butt-dyno” performance numbers on how much power loss you noticed when going to 37’s with factory 4.10 gears?

Thanks,

Troy

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[whiteglad]

https://www.jeepgladiatorforum.com/...eresting-video-post-37s-and-power-loss.28347/

 

[Jay Gatsby]

^^^What he said!

https://www.jeepgladiatorforum.com/...eresting-video-post-37s-and-power-loss.28347/

 

[whiteglad]

Here is another showing 0-60 times stock, big tires, CAI, etc.

 

[Alabama Mud Machine]

That doesn't answer my question... Also, that thread is misleading... It never answered how to regain that lost 30hp...

Either way, I think now I'm going to go with the Edge Pulsar unit for my JTR... Performance mode gives you +30 HP/+27 TQ, and it mounts onto your factory ECM so you don't have to reprogram it or remove your stock ECM from the vehicle (except for mounting the unit to it), and it allows you to change pretty much everything on the vehicle. Not quite as much as the Tazer JL Mini, but but the main stuff, like tires, gears, TPMS setting, TPMS on/off, Auto Start/Stop on/off, etc...

Fairly pricy, but if it doesn't leave a footprint, does all that, and still gives you 4 power settings, that can give you up to +30/+27 on your numbers... Seems like a good deal.

https://edgeproducts.com/edges-new-pulsar-tuning-module-jeep-wranglers/

 

[Digger70]

There are many questions that go unanswered because people just don't know. Do a search just for the tire and maybe there's a Toyota Tacoma forum talking about it etc.

 

[Alabama Mud Machine]

There are many questions that go unanswered because people just don't know. Do a search just for the tire and maybe there's a Toyota Tacoma forum talking about it etc.

I know, I said I searched Google for it, and still found no answer. I was hoping someone on the JT forum would have an answer to give about how much performance loss you FEEL when going to 37's on a JTR with stock 4.10 gears.

There seems to be lots of threads on it, but all older, with no current updated responses. Just wondered if anyone has any new info and updated opinions on the subject.

 

[Digger70]

I know, I said I searched Google for it, and still found no answer. I was hoping someone on the JT forum would have an answer to give about how much performance loss you FEEL when going to 37's on a JTR with stock 4.10 gears.

There seems to be lots of threads on it, but all older, with no current updated responses. Just wondered if anyone has any new info and updated opinions on the subject.

I know you searched google but did you search for the tire and jeep gladiator or just the tire?

The 37x13.50r20 tires I’m looking at are about 36.54” tall (inflated), and weigh 78.17 lbs. each.

What kind of tire is it? Maybe I can find something.

 

[Alabama Mud Machine]

I know you searched google but did you search for the tire and jeep gladiator or just the tire?

What kind of tire is it? Maybe I can find something.

Yes, I searched very thoroughly... Not much on those tires as it is... But I think I'm going to order them tomorrow anyway. They only weigh like 14.5 pounds more than the stock 285/70r17's... So, that won't be anywhere near as bad as going to say a Nitto Trail Grappler or Mud Grappler or Toyo M/T that weighs in the 90 lbs. each range. These are only 78, so that should be a minimal decrease in performance as far as 37x13.50's go...

How much does a stock JTR 17" wheel weigh? I searched Google with that, too, and couldn't find anything. I saw some that said a stock JL Rubi wheel was 21 lbs. but the JTR has different wheels...

Has anyone weighed their stock JTR wheels without tires on them?

 

[Incommando]

Google “unsprung weight” and various terms like performance and such and you will find a ton of info
https://www.eeuroparts.com/blog/unsprung-weight/

 

[Digger70]

Yes, I searched very thoroughly... Not much on those tires as it is... But I think I'm going to order them tomorrow anyway. They only weigh like 14.5 pounds more than the stock 285/70r17's... So, that won't be anywhere near as bad as going to say a Nitto Trail Grappler or Mud Grappler or Toyo M/T that weighs in the 90 lbs. each range. These are only 78, so that should be a minimal decrease in performance as far as 37x13.50's go...

How much does a stock JTR 17" wheel weigh? I searched Google with that, too, and couldn't find anything. I saw some that said a stock JL Rubi wheel was 21 lbs. but the JTR has different wheels...

Has anyone weighed their stock JTR wheels without tires on them?

This states 22lbs https://www.jeepgladiatorforum.com/...anite-crystal-wheels-weigh.25366/#post-410244 and another post down shows 23.4lbs

 

[Alabama Mud Machine]

This states 22lbs https://www.jeepgladiatorforum.com/...anite-crystal-wheels-weigh.25366/#post-410244 and another post down shows 23.4lbs

Cool, thanks! I don't know why none of that stuff was showing up for me...

My 20x10's I ordred are 34 lbs. each, so that's adding 10 lbs. right there. Then the tires, that's adding a total of roughly 25 extra lbs. per corner or rolling mass and unsprung weight...

 

[Digger70]

Cool, thanks! I don't know why none of that stuff was showing up for me...

My 20x10's I ordred are 34 lbs. each, so that's adding 10 lbs. right there. Then the tires, that's adding a total of roughly 25 extra lbs. per corner or rolling mass and unsprung weight...

Cool. Well let us know how it goes. Maybe you'll be the first one on here to write about your experiences for future reference.

 

[NFRs2000NYC]

That doesn't answer my question... Also, that thread is misleading... It never answered how to regain that lost 30hp...

Either way, I think now I'm going to go with the Edge Pulsar unit for my JTR... Performance mode gives you +30 HP/+27 TQ, and it mounts onto your factory ECM so you don't have to reprogram it or remove your stock ECM from the vehicle (except for mounting the unit to it), and it allows you to change pretty much everything on the vehicle. Not quite as much as the Tazer JL Mini, but but the main stuff, like tires, gears, TPMS setting, TPMS on/off, Auto Start/Stop on/off, etc...

Fairly pricy, but if it doesn't leave a footprint, does all that, and still gives you 4 power settings, that can give you up to +30/+27 on your numbers... Seems like a good deal.

https://edgeproducts.com/edges-new-pulsar-tuning-module-jeep-wranglers/

There is no way on god's green earth a crap tuner will EVER give a naturally aspirated motor a 30hp gain. TOTAL BS.

 

[sass JT]

After watching this... I would never buy a pulsar.



Personally if I was going to do a tune, I would do this superchips product.

https://superchips.com/shop/traildash2-for-jt-gladiator

that's my .02

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