Tire pressure

[Tonopah]

I have BFG M/T 33in tires on my roxor. I am currently running 22psi in all four with no issues. How low can I go before risking tire/bead separation? I'd like to try 18psi.

 

[Tonopah]

With the Bilstein shocks and 22psi the roxor rides so much better. I dropped the tires to 18psi just now and I will run it around the ranch tonight and see if that further improves the ride.

 

[Roxasuras]

Nice. I would say not below 15psi, but I'm no expert, I'm still learning.

Did you do the shocks yourself ? I thought about upgrading.

 

[Tonopah]

My son-in-law did the shocks. I bought my roxor used and the prior owner did some kind of mild lift and adjusted the bump stops just a bit. The tires (255x85x16) do not rub at all. My son-in-law is a mechanic and he measured the spacing carefully and bought Bilsteins that fit my roxor right. By the way, the OEM shocks were absolute crap -- zero rebound and useless. So, in my case, it was easy to improve the ride!

 

[Roxasuras]

Nice sounds like a good set up.

 

[Gabe]

Just wondering what you guys keep your tires psi for roxor off road. Mostly hilly gravel roads. I was thinking of starting with 15 psi. The tires will be 235/85r16 Cooper stt pro. Stock shocks to start.

 

[OffRoad709]

Just wondering what you guys keep your tires psi for roxor off road. Mostly hilly gravel roads. I was thinking of starting with 15 psi. The tires will be 235/85r16 Cooper stt pro. Stock shocks to start.

Playing with my psi currently at 22 , going to drop it to 20 see how it handles as I do some blacktop driving. Dump those stock shocks , granny's pantihose would be an upgrade over those 😆. I put in KYB's and the difference was night and day plus half the price of the Bilstien.

 

[TomRox]

I used to run 15psi off-road 25psi on road on 33-12.5r 15

I got lazy and run 15psi full time now
No issues

 

[Gabe]

Right now I am at 25psi for the roads but will lower to 15psi for the woods. I will probably be lazy and leave it at 15psi as well.

 

[Bob R1]

I run mine on gravel roads and pavement a lot. I have been running my 235/85R16 Rough Tread Tires with 30 psi in them. This seems to be working just fine so far.

Bob R

 

[Gabe]

Off Road / Gravel roads the 235/85r16 Cooper stt pro do great 12-15 PSI. Running with the Bilstein shocks.

 

[motormd]

10.5 with no issues and ruts and small bumps disappear.

 

[Hummingbird Ranch]

I am still running the OEM 235/70R16 Goodyear Wrangler Workhorse tires, or equivalent replacements that came on my 2023, but I have been forced to run the tire pressures on the high side at 28 to 30 PSI in order to minimize shoulder and sidewall exposure to the sharp rocks on my ranch. The ride is rougher, and I am sure traction is lower (but not an issue on my dry rocky terrain), but the ride is helped by the Bilstein Shocks. I also run the Extreme Ultraseal in the tires which works great on those two inch long mesquite thorns that penetrate the tire tread, shoulder and sidewall, but it is the shoulder and sidewall cuts from the razor sharp rock shards that cause me to have to replace tires. I carry a spare and I also have another tire already patched off the rim just waiting in a rotable pool for the next tire shoulder or sidewall cut. I have been able to successful patch those shoulder and sidewall cuts (which holds up fine, as I do not drive off the ranch and rarely exceed third gear). I have also gotten pretty good at manually changing tires with tire spoons and the Harbor Freight bead breaker. I would really like to find some tires with some serious sidewall protection like I have seen for strip mining vehicles but no one makes anything for tires this small. If my current rotable pool routine gets to be too much, I will break down and have the tires filled with foam. Foam filled tires are bullet proof and will last until you wear the tire tread off, but the downside is they are rock hard, no give, and are so heavy that you have to use a hoist or heavy equipment just to get them in or out of a pickup bed. I have the tires on my Kubota filled with foam, the weight is a plus on the tractor, but they will absolutely beat you to death on the tractor on that rough rocky terrain. If anyone has any good solutions I would love to hear them.

 

[Sasquatch]

I started off at 35, then went to 30, and now 25. So much better at 25, might even go to 20. They are LT's so they are a rugged/stiff tire and would be fine at that pressure.

 

[Jesse Torque King 4x4]

I run Cooper STT Pros (with white letters out) at 14-18 PSI, and lower when snow wheeling 2-6. I do have Cyote bead locks in stock wheels so I never lose a bead. Longest trip at 18 was from Billings MT down to Sheridan WY and back on I90, tires didn't get hot but I'll probably do 20-22psi if I make that trip again.

My least favorite is stock tires, there just isn't enough rubber to air down and have significant benefits due to a short sidewall but it is better. I tried Interco 33" skinnies and they were fantastical at about 18psi.

The Coopers are a 10 ply with pretty stiff sidewall which I wanted for puncture resistance, but it also makes winter performance poor. I got some nice Interco bias-ply tires for that but need to finish my other set of wheels to mount on.

Without some type of bead lock, pressure should ideally be at least 20 for highway driving, with 15 being pretty safe for gentle off road. This also depends on tire diameter as larger tires have more leverage to blow a bead. I have seen a guy do about 6psi in the snow but he was careful AF and had the right stuff to re mount if needed. I didn't ask but it looked like the tires were made for a slightly larger rim as well...

The worst thing about tires is with so many options and driving terrain, it is difficult to find the right all-around unit.

 

[txroadkill]

Wheel width will make a huge difference in losing a bead. A 12.50 wide tire on a 10” wheel will have the potential to lose a bead much easier than the same tire on an 8” wheel. I’ve always run 12.50s on 8” wheels and routinely air down to 8-10 and have yet to lose a bead.