tecommended tire pressure?

I have Kumho Crugen 235/75R15 tires on 7"rims. Currently set at 26 psi front 29 rear cold. Can't find cold recommendation. Anyone know if this is ok? rides, steers ok

 

You can use this to calculate based on the size and load range vs the OEM size, load range, and recomennded cold psi in the door jamb.

 

No one can tell you but you.

Do a chalk test.

/thread

 

Full. Not overly nor under but in between.

 

Recommended PSI should be on your door sticker. Pretty sure that's a "cold" pressure.

Are you noticing any abnormal wear on your tires?

Personally, I run 26.371 on the left front, 26.828 on the right front, 28.504 on left rear, and 28.625 on the right rear.

 

thanks to thatbassguy. i'll adjust accordingly. them try a chalk test to confirm

 

In my opinion (which doesn't really mean anything except to me ) the pressures given on the door sticker are for the tires that came with the truck when it was brand new. When I changed tire brands and used the pressures given on the door sticker (26 front, 28 rear), I began to have wear problems. All tire sets were rotated and balanced every 5,000 miles or so and the pressure was set to 26/28 except for the Michelin set. Here's my experience with tires...

January 1998: The original tires were Goodyear AT. From Day One I never could get them balanced correctly. I got a lot of vibration through the steering wheel from 65 mph to about 70 mph. Rotating the tires didn't help and after several rebalance attempts the problem remained.

May 2003: After 33,688 miles on the Goodyear tires I replaced them with Bridgestone Dueler Revo 1. The out-of-balance symptom disappeared but the tires were cupped when I replaced them.

October 2010: After 26,088 miles on the Revo 1 tires I replaced them with Bridgestone Dueler Revo 2. I replaced the steering rack and got an alignment. 12,000 miles later I noticed some tire hum. At 18,000 miles the tires were moderately cupped and the noise was very noticeable.

January 2015: After 19,674 miles on the Revo 2 tires I replaced them with Michelin LTX A/T2. I set the pressure to 36 PSI all around and have maintained that. Also I have the front end aligned every 2 years. These tires do not make any noise and they ride perfectly smooth.

May 2022: The Michelins now have 30,550 miles on them and about 35-40% of the tread is left. No signs of cupping or other unusual wear. I attribute this to the increased tire pressure of 36 PSI and to an alignment every 2 years.

 

I am able to calculate it for you.
Its all to give the tire a deflection for the speed, that wont overheat any part of tire material.
Load o tire in relation to maxload of tire, and pressure in relation to reference-pressure on tire, that makes the deflection .

Referencepressure of standard load P-tires is 35 orv36 psi, and XL/reinforced/extraload 41 or 42 psi.

 

Where are the tires you changed to the same size and load range as the OEM tire? Also, it sounds like you had issues with the original tires as well. If you're changing tires at 33K, there's probably an issue.

Changing to a different brand, or even style, shouldn't affect the required pressure. Different load range or size should. Of course, every tire is slightly different. And, there can be other variables.

I refer to the calculator as a good starting point. It can be fine tuned from there.

 

What I did.

A while back I put Toyo AT3s on my truck. I was at a loss at what pressure to run daily. Ended up calling Toyo themselves and they asked me what the sticker on the door said. I gave them that information and they have a calculation sheet for my tires along with the pressures on the door frame. They returned me a figure and that's what I run.
It's actually been perfect for me. You might give that a try.

 

The link in post #2 takes you to a calculator just like that.

 

Yeah I saw that and looked at it. Tire size is awesome. I just didn't see that calculator until after I called Toyo.

 

It's nice of Toyo to help their customers out. I have a set of AT3's also and they're very good tires! They seem to be one of the best manufacturers all-around.

 

I clicked on the link and it only has certain size of tires though. How do you plug in your size? Could be my iPhone to.

 

I think those are just examples. Once you click on the type/style, then you are able to put in your actual size and load range

 

Right on point! Calculated as Toyo described.