Moved up to 285 Nitto Terra Grapplers, now what psi?

[MtnBikeAZ1]

Swapped from 265/70rs to 285/75r Nitto Terra Grapplers which raised the clearance on my diffs 1 1/4". I searched and found a lot of info on TGs versus other tire brands but nothing on psi in MUD. The TGs have a max psi of 65. The tire reviews I read on the net had these on pickup trucks and said to run them at 60 - 65 psi to get better mileage. However, they ride better, but wear faster at 35 - 40 psi. For those that have this tire size, what psi are you running? Thanks! Here's a pic of the new tires

 

[Paul_L]

I had these on my '96 4Runner & I really liked them. The tire shop set them at 60-65 psi. They felt like driving on basketballs, you could feel every bump in the road. If you run them at 60 psi, you will most likely wear the center tread first. I ran them at 32 psi. You can try using a tire crayon to mark lines across the tread then drive a few revolutions to see where the wear pattern is & adjust pressure accordingly. That will probably put you in the 24-26 psi range.

Paul

P.S. - I like your bumper.

 

[e9999]

we had 285/60R18 on the 100 DD.
Those were ply-wise a bit more than the P type. Not the LT though. Forgot, but likely around 44psi max spec.
Usually ran them around 36 psi or so.
They did 50K and had some (1/8"?) tread left.

(I think the faster wear at the center for high pressures is not that big an issue. With the edge wear due to turning and wear on the edge lugs due to rocks etc, it seems more likely than not that the center wear will be largely irrelevant for offroad tires for any reasonable pressure)

 

[MtnBikeAZ1]

I had these on my '96 4Runner & I really liked them. The tire shop set them at 60-65 psi. They felt like driving on basketballs, you could feel every bump in the road. If you run them at 60 psi, you will most likely wear the center tread first. I ran them at 32 psi. You can try using a tire crayon to mark lines across the tread then drive a few revolutions to see where the wear pattern is & adjust pressure accordingly. That will probably put you in the 24-26 psi range.

Paul

P.S. - I like your bumper.

Thanks, my front bumper is a Slee Shortbus with Warn winch.

 

[arndog123]

Nice. It looks like you could fit 315's under there.

 

[mainemike]

Experiment with 32-36 psi and see what rides best for you. I've had those tires for 40,000 miles and they still have life in them. I'm getting ready to replace them mainly because it's snowing. I never rotated them, not once, and they have worn evenly. (this has worked for few mudders, even though it sounds like a bad idea).

 

[FirstToy]

I got lazy and aired up only to around 36psi. Usually I had it up to 40-45psi. I can tell you that the ride is 100% better and my mpg's didn't suffer at all.

If I load up for a camping trip, I'll pump up to compensate though.

 

[Bigshone]

I've been running my 285/75/16 NTG for almost 50,000 miles and love them. Between 36-38 PSI works good for me. Nice ride and good tread wear.

 

[Corbet]

My truck is built similar to yours as far as weight goes. I'm happy with 38 psi in my 295 TG's. Wear has been very good so far over the first 13,000 miles.

 

[MtnBikeAZ1]

Sounds like 32 - 40 psi, with most running at about 36 psi. I'm also happy to hear that folks are getting 40K+ miles out of these tires. Considering the price, these are a bargain if they hold up that long. Thanks everyone!

 

[BrotherRob]

Sounds like 32 - 40 psi, with most running at about 36 psi. I'm also happy to hear that folks are getting 40K+ miles out of these tires. Considering the price, these are a bargain if they hold up that long. Thanks everyone!

The proper PSI is listed on the plate in the door jam. IIRC `32 PSI. My first set of Nittos lasted 54k, and I beat the snot out of them. I was over 50k before I ever had a repair.

 

[rhyary]

Oh brother, 40K to 50K. I have a long way to go before I can justify 315. :-(
I run 35, above that it is too bouncy on the roads around me. Below that it is to soft for my taste

 

[ardentyota]

Oh brother, 40K to 50K. I have a long way to go before I can justify 315. :-(

LOL I was just thinking the same thing...