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F350 rear tire pressure

  #1  
Old 01-04-2019, 12:31 AM
Rockinfigs
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F350 rear tire pressure

Are you f350 owners always running your rears at 80psi? Or do you lower when not towing n 80 when towing
 
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Old 01-04-2019, 12:39 AM
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I run mine at 80 consistently. It doesn't ride any worse than my 2010 F150. 2018 CCLB F350.
 
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Old 01-04-2019, 12:51 AM
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I drop mine. 65psi seems to smooth out the ride for me.
 
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Old 01-04-2019, 01:05 AM
Rockinfigs
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Originally Posted by jrwinger View Post
I drop mine. 65psi seems to smooth out the ride for me.
When u do 65 in rear it doesn't set off the low pressure sensor?
 
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Old 01-04-2019, 01:27 AM
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I suppose it depends on how much of your driving is while towing. 80% of my driving is towing, so I leave them at 80 PSI.
 
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Old 01-04-2019, 01:28 AM
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Originally Posted by Rockinfigs View Post
When u do 65 in rear it doesn't set off the low pressure sensor?
Yes, it does. But you can adjust that with Forscan. I have yet to make the adjustment in Forscan yet (it's on my "to do" list). For now I just click "OK" when I start the truck & get the low pressure warning.

I plan to put set my low pressure trip point to 55 PSI - You'd be amazed how the ride improves as you drop PSI.

For more info on forscan see here: Forscan
 
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Old 01-04-2019, 07:13 AM
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Lightbulb

I have our truck’s cold tire pressures lowered from 65F/80R to 55F/65R psi when lightly loaded; the ride is less jittery.

No FORscan adjustment, no TPMS issue. However, I suspect I’m flirting with triggering a TPMS warning.

HTH,
Jim / crewzer
 
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Old 01-04-2019, 07:23 AM
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I run mine at 55 all the way around unless Iím towing heavy. Rides way better & tire wear is even across the tread on all 4. Used Forscan to drop TPMS to 45.
 
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Old 01-04-2019, 08:44 AM
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I keep mine at 80 because the way my work goes I never know when I might have to hook up and deliver a load. Boy Scout motto: Be prepared.
 
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Old 01-04-2019, 08:45 AM
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Originally Posted by Tom N OH View Post
I run mine at 55 all the way around unless Iím towing heavy. Rides way better & tire wear is even across the tread on all 4. Used Forscan to drop TPMS to 45.
+1 ........Me too
 
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Old 01-04-2019, 10:11 AM
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Im running 60 all around. I used FORscan and set them at 55. i also noticed that FordPass also adjusts recommended pressure to whatever FORscan changed it too.
 
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Old 01-04-2019, 10:36 AM
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I drop my F350 CCLB from the standard 65/80 to 65/75 in the summer (towing season) and to 60/65 when the snow starts to fly and I know I will not be towing. I have lowered my TPMS to 55 with forescan.
 
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Old 01-04-2019, 10:44 AM
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55 empty rear
 
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Old 01-04-2019, 10:47 AM
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I have a dually, but what I am going to describe applies to SRW or DRW.
To maximize tire life, the best thing to do is to adjust pressure based on weight on that axle.
There are load inflation tables from all tire manufactures.
I have weighed my truck, both loaded and unloaded.
I then use my axle weight and the load inflation table and adjust my tire pressures accordingly.
For my front, loaded or unloaded, I run my tires at 65psi.
For the rears, loaded, I run my pressure at 57psi.
For the rears, unloaded, I run my pressure at 34psi.

I got 74k miles out of my last set of rears on my 2012.
 
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Old 01-04-2019, 11:20 AM
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Originally Posted by N2dunz View Post
I have a dually, but what I am going to describe applies to SRW or DRW.
To maximize tire life, the best thing to do is to adjust pressure based on weight on that axle.
There are load inflation tables from all tire manufactures.
I have weighed my truck, both loaded and unloaded.
I then use my axle weight and the load inflation table and adjust my tire pressures accordingly.
For my front, loaded or unloaded, I run my tires at 65psi.
For the rears, loaded, I run my pressure at 57psi.
For the rears, unloaded, I run my pressure at 34psi.

I got 74k miles out of my last set of rears on my 2012.
First - I have looked, with no success, for an inflation chart that I can use. All the charts I can find are intended for commercial trucks with commercial tires. I would really appreciate a link to a non-commercial chart for my stock Michelin tires.
I run my tires at the specified 70 front and 65 rear. Just replaced all six at 85,000 miles. Remaining tread depth was 3mm which is above the legal limit, but too shallow for winter driving in my opinion.
 

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