Tire pressure on trailer
- Thread starter The Swiss
- Start date
Tucson T4R
Expedition Leader
On my 2500 LB KK trailer when fully loaded I run about 40 to 45 lbs on the highway then air down to about 30 when I hit the dirt.
On the way back out with a lighter load sometimes I'll drop it down to about 25lbs. I haven't run into the need to go any lower yet.
On the way back out with a lighter load sometimes I'll drop it down to about 25lbs. I haven't run into the need to go any lower yet.
elmo_4_vt
Explorer
I usually run my ~1900lb trailer at about 35psi. It's really subjective though. I just lowered the pressure until it looked like the whole tire (side to side) was touching the road. At 60lbs, the contact patch was only in the very center 2" of the tire. That's the best way I can think of. I do that on my truck too, since the numbers on the door sill are for 29" tall by 9.5 inch wide tires, that same PSI doesn't necassarily hold true with 35x12.5 tires with a hire load rating.
Don
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Don
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StumpXJ
SE Expedition Society
If you have tires that are designed for trailers, you may need to run them at 60psi. I had to run at 60 psi on my enclosed trailer before I converted it to an offroad trailer. Now that I run a regular mud terrain tire, I run 36 psi, same as I run on my Jeep.
The sidewall should give you information.
~ James
The sidewall should give you information.
~ James
The Swiss
Expedition Leader
They are trailer tires. The sidewalls don't show the smallest sign of a bulge.
StumpXJ
SE Expedition Society
No, I mean the sidewalls may have inflation PSI information on them. My old trailer tires said specifically on the side wall, 'inflate to 60psi for trailer use'..... that sort of thing.
Im sure someone here can get into the guts of it, I just know that a vehicle tire is different than a trailer tire, thus possibly requiring a different pressure. It has more to do with bias, ply, construction etc. I am not an expert, nor even partially informed on the subject, so hopefully someone with first hand knowledge will chime in.
:elkgrin:
~James
The Swiss
Expedition Leader
Got it :wings: Thanks. Next time, explain it to me in German so I get it the first time :coffeedrink:
BigDaveZJ
Adventurer
On my car hauler I run them at the max, which is like 50-60psi. On the M416 I pretty much run them to match the Jeep on the trail, usually 12-15. On the road I go slightly less than the Jeep, usually end up between 20 and 25. I've got 33x12.50R15's on the M416 and I doubt its ever gotten very far over 1500lbs.
As long as the load rating is close to the intended use of the trailer here is a simple mthod for checking to see if you tires are properly inflated.
Take a piece of chalk and rub it across the tread (sidewall to sidewall, not circumference:elkgrin
Pull the tire forward one revolution noting the how the chalk is disturbed. If the entire mark is disturbed add a few pounds of air and check again until the edges of the mark are no longer scuffed, remove a little air and the tires have the correct pressure.
Take a piece of chalk and rub it across the tread (sidewall to sidewall, not circumference:elkgrin
Pull the tire forward one revolution noting the how the chalk is disturbed. If the entire mark is disturbed add a few pounds of air and check again until the edges of the mark are no longer scuffed, remove a little air and the tires have the correct pressure.
SAR_Squid79
Explorer
35 psi on the HWY.
10 psi on the trail.
10 psi on the trail.