How many psi for 245/75R16


likea3andit

New member
Joined
Feb 23, 2019
Messages
3
Reaction score
1
Points
3
Location
Columbus, Ohio
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
Recently got 5x 245/75r16 for free (tires & rims) to replace my 225/70r14 on my 94' 2.3l 2wd. Everything fits good and feels good. But I'm not sure the best psi to run... I'm thinking the truck may have had some sorta lift before I got it, because of how well the new wheels fit. I've got good clearance, it rides good, and the speedometer isn't as off as it was with the stock 14s.

The tires say 80psi max, the stock were 35psi (or 32 can't remember) right now I'm running them at 55psi.
 


Rock Auto 5% Discount Code: 248EE46702D889 Expires: October 1, 2019

Bird76Mojo

Well-known member
Joined
Jun 28, 2009
Messages
1,662
Reaction score
462
Points
83
Location
Toledo, il.
Vehicle Year
2001 & 1987
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0 - 5.0
Transmission
Manual
2WD / 4WD
4WD
Total Lift
4" Superlift
Tire Size
33"
My credo
Good enough
Whatever the door sticker says. Run that. To start out with at least. You can always vary the pressures to your liking after that..
 

Uncle Gump

Well-known member
Supporting Member
Joined
Sep 17, 2018
Messages
1,127
Reaction score
388
Points
83
Location
Plano IL
Vehicle Year
2006
Make / Model
Ford
Engine Size
4.0L
Transmission
Automatic
2WD / 4WD
4WD
My credo
Lead, Follow or get out of my way
80 psi max seems like those are E rated truck tires. My E rated truck tires get run with 31 psi front... 28 psi rear and I get a full contact patch at those numbers.

I personally think 55 psi is way to high.
 

ericbphoto

Old Redneck just wingin' it.
Supporting Member
U.S. Military - Veteran
TRS 20th Anniversary
Joined
Feb 7, 2016
Messages
2,446
Reaction score
361
Points
83
Age
55
Location
Wellford, SC
Vehicle Year
1993
Make / Model
Ford Ranger
Engine Size
3.0L
Transmission
Manual
2WD / 4WD
4WD
Total Lift
6"
Tire Size
35"
My credo
In theory, theory and practice are the same. In practice, they are different.
I agree with bird. Start with the door sticker recommendations. The pressure you need is based more on the load they will be bearing, ie; the weight of your vehicle.
 

pjtoledo

Well-known member
Supporting Member
U.S. Military - Veteran
Joined
Oct 5, 2007
Messages
1,865
Reaction score
102
Points
63
Location
Toledo Ohio
Vehicle Year
20002005199
Make / Model
Fords
Engine Size
3.0 2.3
My credo
get outta my way, I'm falling!
I once had 245/70-16 on my 2005 2wd reg cab. that light of a truck doesn't need much pressure on a large tire, I ran 28 PSI.
 

racsan

Well-known member
Joined
Aug 17, 2007
Messages
1,922
Reaction score
131
Points
63
Age
49
Location
central ohio
Vehicle Year
1994 (mostly)
Make / Model
ford
Engine Type
2.3 (4 Cylinder)
Engine Size
2.3/140-4
Transmission
Manual
2WD / 4WD
2WD
Tire Size
225/70/15
My credo
built, not bought
yeah, running that high of pressure will wear out the center tread of tire and will make for a rougher ride. You must have low gears to be able to handle a tire that size. I went from 225/14’s to 235/15’s but Ive also went from 3.45 to 4.10 gearing. Im running 30 psi
 

likea3andit

New member
Joined
Feb 23, 2019
Messages
3
Reaction score
1
Points
3
Location
Columbus, Ohio
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
Thanks for the advice! I wasn't sure if psi was soley on load weight or if different size tires had different requirements.

And yeah I'm pretty sure they're E class. I don't know what they came off of, but they fit like a glass slipper and my old tires were about shot and I didn't have a spare for when one of them did go... But thanks again I appreciate it.
 

sgtsandman

Active member
U.S. Military - Active
Joined
Mar 11, 2017
Messages
770
Reaction score
230
Points
43
Location
Aliquippa, PA
Vehicle Year
2011 & 2019
Make / Model
Ford XLT & FX4
Engine Size
4.0 SOHC & 2.3 Ecoboost
2WD / 4WD
4WD
Tire Size
31X10.5R15 & 265/65R17
Stock door jam pressure seems to be the best starting point in most cases. That is what I stuck with when I went to 31s. I did do the math to figure out what they should be (33 psi) but 35 is so much easier to work with on a tire gauge and won’t make that much of a difference in ride or wear.
 


Top