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 > Better ride when not towing?

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IdaD

Idaho

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Posted: 03/03/21 09:34am Link  |  Quote  |  Print  |  Notify Moderator

way2roll wrote:

Not to hijack the OP's thread, but in the same line of thinking - should I adjust my tires on my SRW truck when not towing? 80PSi rides like a dream with the FW hooked up but bounces around quite a bit when empty.


My door sticker says 60/80 but I drop the rears to 60 or a bit less when I'm not towing and it helps a lot. Whenever I'm towing I take the rears back up to around 80.


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rhagfo

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Posted: 03/03/21 09:35am Link  |  Quote  |  Print  |  Notify Moderator

ls1mike wrote:

I have a 17 3500HD, upgraded from an 02 2500HD. I can tell you right out the gate the 17 rode much nicer than the 02. I then put Bilstein's on the 2017 and it made it better.
Like someone said earlier I am not a truck so I don't daily drive it. I have a Caprice PPV or Trans Am that I drive, but the Bilstein's made it ride nicer than the Trans Am. So might be something you can look at if you are daily driving it.


I agree, went from a 2001 2500 to a 2016 3500 DRW, and the ride is smother.


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Grit dog

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Posted: 03/03/21 09:43am Link  |  Quote  |  Print  |  Notify Moderator

$20 says the OP is a one and done poster...


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Grit dog

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Posted: 03/03/21 09:57am Link  |  Quote  |  Print  |  Notify Moderator

MFL wrote:

way2roll wrote:

Not to hijack the OP's thread, but in the same line of thinking - should I adjust my tires on my SRW truck when not towing? 80PSi rides like a dream with the FW hooked up but bounces around quite a bit when empty.


I should have answered OPs question earlier, instead of off topic, but same answer here too. Yes, lower the psi when not towing. A DRW starts out with less when loaded, and can go lower than SRW, when unloaded due to 4 rear tires vrs 2. On my truck, F250, door sticker psi 75 front 80 rear, but when not towing I run 65 psi in rear. It makes a huge difference in ride quality.

My 250 actually has, was ordered with, 350 suspension.

Jerry


And you’re still way over the required pressures front and rear for driving empty.
Of course smaller tires will need more pressure for the same capacity as a larger tire, but using the typical HD diesel srw truck. They all are similar in weight.
Stock size tires (275-285 wide something or others), empty pressure Front, 50-60 psi depending on handling characteristics and traction you want . Rear, 35-40 psi.
Bigger tires, even less. 37-12.50s on our current diesel truck. Being it’s winter time AND I’m trying to correct the over pressure center tread wear from the previous owner, I’m at like 40 psi front, 30rear. It doesn’t drive squishy. Summer time I’ll put a little more in them to combat heat and friction due to the change in road conditions.

New half ton crew cab, I’m running 38/32 in 275-65-18 tires vs the 45psi all around that it come off the dealer lot with. Rides nicer, better wet road traction and will wear better than being over inflated for the load.

Anyone riding around with rock hard tires when they’re not needed should take the 5 minutes to air them down correctly. It’s like a free suspension and traction upgrade.

Different story if you’re hauling a lot of the time. I don’t change tire pressure daily. If I’m hauling the camper in the summer I’ll leave the rears aired up between trips. Unless I’m going on a on empty road trip and wish to keep my teeth and spleen in tact!

time2roll

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Posted: 03/03/21 10:17am Link  |  Quote  |  Print  |  Notify Moderator

Could weigh the truck and use the tire weight chart to reduce pressure.


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Cummins12V98

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Posted: 03/03/21 11:54am Link  |  Quote  |  Print  |  Notify Moderator

Bilsteins and 30psi rear on a DRW is going to give you a reasonable ride.

What truck do you have? Also Factory rear air is nice!!!


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Gator398

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Posted: 03/06/21 07:08am Link  |  Quote  |  Print  |  Notify Moderator

Thanks for all of the great input! I was waiting for someone to take that $20 bet lol. My tires were at 80 psi, now 65 which is plenty for my 26' 6500# bumper pull. I may try 50 rear after reading this, thanks.

I just bought a 2011 Ram 3500 Laramie Longhorn, all stock 70k miles and it has 1 yr old Firestone AT's. I don't think shocks have been replaced yet, if were replaced they are factory mopar so I'll be replacing with Rancho's like I did on my last srw truck.

And about speed, that was first thing I noticed. Slowing down to dangerous levels (50 in 65) doesn't help. Going 80 though makes it non existant, like skipping over white washed roads off pavement.

Edit: my 2017 I traded for this truck had factory rear air Leveling suspension, the rear air does nothing for ride and that stuff was making noise every time I fueled like it was maxed out, pumping for couple minutes then it would let air out and stop, start again after couple minutes. Real air suspension does not have springs, this has been figured out in the semi truck world where they have bags on every axle and springs are only on pre-90's big trucks (and freightliners aka freightshakers) nowadays

* This post was edited 03/06/21 07:23am by Gator398 *


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Grit dog

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Posted: 03/06/21 10:25am Link  |  Quote  |  Print  |  Notify Moderator

Well, I’m a man of my word! I got your $20 the next time I’m passing thru Oklahoma!
Or hit me up if you’re in Seattle. [emoticon]

But in the mean time, the right pressure is based on weight and you appear to be categorizing all 4 wheels the same.
Go outside, set your fronts at 50-55lbs (assuming stock ish size tires) and the rears to 35psi and take a quick test drive.
65 is acceptable but stiff up front and still rock hard on the back of an empty pickup.

You would want to air up a bit in the rear when hauling the TT but 65psi will handle the full tongue weight of a wavier trailer than yours AND a bed full of stuff.

Grit dog

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Posted: 03/06/21 10:31am Link  |  Quote  |  Print  |  Notify Moderator

It is hard to believe that this simple concept seems to be lost on so many... not the OP in particular, but the majority, in general.
Not pertaining to rough ride but to knowing how tire pressure affects a vehicles ride and handling....
I did it again, in Dallas during that snow a couple weeks ago. We stopped to help push a guys suv up a hill , stuck at an intersection on a slight incline.
Was too slick for me and the 2 kids w me to get any traction as well, so I let a bunch of air out of his back tires (clueless jack wad didn’t even get out and help, or get out and stop me from doing it) and off he went. No push needed!
Drove a rear wheel drive sedan 650 miles , mostly through a blizzard to get out of Dallas. First thing I did when I filled up w gas is dropped the tire pressure to about 25psi all 4 tires. That car scooter through the snow and tracked like a one horse open sleigh!

Me Again

Sunbird(Wa)/snowbird(Az)

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Posted: 03/12/21 05:58am Link  |  Quote  |  Print  |  Notify Moderator

eHoefler wrote:

I reduce my rear tire pressure from 80 psi to 40 psi when I am not towing the fifthwheel


Why do you over inflate your rears when towing? Does not it say 65 on the door jam placard? 35 PSI in rear dual tires in good for empty load.


2021 F150 2.7 Ecoboost - Summer Home 2017 Bighorn 3575el. Can Am Spyder RT-L Chrome, Kawasaki KRX1000. Retired and enjoying it!


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