Tire PSI

[Kapt]

What do you guys run? Every time I get my oil changed, or tires rotated they feel like that have to inflate my tires to 50 psi and it rides like **** like that. So I let the air out until they are at 40 psi. 33/12.50/20

 

[TatertotScott]

Big Horn 2017 1500 CCSB

LT 275/65-r20 E-rated (10 ply equivalent) Nokian Rotiva AT+

50F
45R

Rides excellent

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[CincyZach]

I have 35" tires and run 36lbs which is what is recommended for my truck in the door jam. I had contacted Custom Offsets about this and they said to run the factory recommendation. They even sent me a video on it. I also contacted Nitto which is the brand tire I have. They put my info for my truck into a formula they have and it came out to 36.4lbs, so they said keep it between 36 - 38 lbs. So I think your trucks factory recommendation is good to use. I have also seen where people use the chalk test to determine what PSI to run. Search it on here and you should find some good info on how to do it that way.

 

[Kapt]

I have 35" tires and run 36lbs which is what is recommended for my truck in the door jam. I had contacted Custom Offsets about this and they said to run the factory recommendation. They even sent me a video on it. I also contacted Nitto which is the brand tire I have. They put my info for my truck into a formula they have and it came out to 36.4lbs, so they said keep it between 36 - 38 lbs. So I think your trucks factory recommendation is good to use. I have also seen where people use the chalk test to determine what PSI to run. Search it on here and you should find some good info on how to do it that way.

Good information. Thank you

 

[Wahrsuul]

I always go with what's on the door sticker as well. All stock here.

 

[JB1]

Here’s the video Zach was referring too

https://www.ramforum.com/threads/how-to-extend-tire-tread-life.135196/#post-1933164

 

[Elevated 2013]

A lot of it depends on what you like. Some people like to feel the road and give it a sports car feel to it, so they air the tire up to within 5 psi of what the maximum psi that the tire can handle. Some people like the way a Buick rides (they ride like they’re on clouds and you don’t feel the road much at all) so they fill their tires closer to 10 less than the maximum the tire can hold. Some people will fill the tire based on the door jam and that’s what the manufacturer says to put in the truck based on best performance and safety based on the original tire that it came with. It’s still up to the owner as to how what they like.

All that being said, after going through school to be a mechanic and then working in the field as a mechanic for 20+ years and selling tires for another 3 years, I was shown that to make a tire last as long as possible to fill it within 5 psi of the maximum inflation that is stamped on the tire as that’s what it was built and tested for. I have BF Goodrich AT KO2 35x12.5x17 tires that want 55 psi (I believe) and I keep mine at 50 in the Summer and 45 psi in the Winter and I like the ride as it’s not too harsh of a ride and the truck doesn’t feel like it’s floating. I’ve always liked how sports cars feel and hug the road so I don’t mind feeling the bumps so I feel more connected to the road. I’ve never liked soft rides where I feel like I’m floating and don’t feel the road as much as I feel like the car/truck doesn’t handle well at that point. It’s all about the kind of ride you like and how the truck handles to you in the end since you’re the driver.


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[CincyZach]

Good information. Thank you

Welcome

 

[Quick_Shifter]

What do you guys run? Every time I get my oil changed, or tires rotated they feel like that have to inflate my tires to 50 psi and it rides like **** like that. So I let the air out until they are at 40 psi. 33/12.50/20

The load rating on the tire is going to play a huge roll in this factor. If you are running a load E or 10 ply tire the psi in an oem tire will not compare. Reference the sticker on your door to give you a good idea where you should be. The Chalk test is good to dial it in.

 

[rule18]

OEM Toyo 33" tires and air suspension, I'm at 55F and 45R (cold) which is what the door sticker says which in this case works for me.

 

[ram1500rsm]

36psi in my 315's e rated cold.

 

[TatertotScott]

I have the math formula posted in another thread, but suffice to say it is only a starting point.

You have to take into account weight capacity of the tire, weight distribution on the truck axles, GVW that you are running at any given time, etc.

I say, anything over 35 PSI on P, C, and most D rated tires is good. 40+ on E rated in general.

Adjust for personal preference.

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[MarineBSP]

TatertotScott -

A little off topic, but how do you like the Nokian Rotivas for all round driving ? For winter ? In the winter I run Nokian R2's on our other vehicles here in Minnesota. Customer reviews on the Rotiva's aren't so common, so thought I'd ask you.

I still have the original Goodyears in stock size (same size as yours), and I'd like a better balance toward cold / snow performance without giving up too much in ride / fuel economy / noise. I expect your tires are wearing okay ? My experience of the Nokian winter tires is much better wear than most competitors - even sometimes having to 'use them up' running into Spring and Summer or else feel like I'm wasting.

Thanks for your thoughts.

 

[TatertotScott]

These are All Weather (not to be confused with All Season) tires. So I run year-round.

I have nearly 10,000 miles so far and wearing like iron.

Grip in pacific northwest slush/snow/ice/rain is outstanding. Would expect less in a dedicated winter tire...simply another level.

Dry grip is comparable to any AT tire.

Off road/trail grip on big/small/sharp/smooth gravel is up to par with BFG KO2s.

They are less aggressive looking sidewalls than KO2s, but they are quieter and way less expensive.

Being E rated, they also come with about 3/32nds more tread than P tires.

275/65-20 is one aspect taller, so runs true 34" diameter.

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[MarineBSP]

Thanks ! (I missed the 65 profile, but that would be just fine)

 

[MidwestJ]

OEM spec of 35 per my door jam sticker

 

[ThunderMug95]

I had to chalk test mine. Tires drastically different than oem...then p265/70/17...Now LT305/55/20. Mine are happy at 47psi cold. 12k on tires so far, depth is very even across.

 

[Mikes578514]

I run my tires a couple of pounds over the door sticker to keep the damn tire light from indicating when the temperature outside changes

 

[n-humble]

My Limited came with Bridgestone Dueler H/L Alenza tires, 275/55R20. I keep 44 psi in them as per this chart: https://tirepressure.com/bridgestone-dueler-h-l-alenza-plus-tire-pressure

 

[Reddington]

BFG AT KO2 I run 45r50f