08-08-2019, 04:56 PM | #31 |
older fart than ZBB
Join Date: Oct 2003
Location: On the road again
Posts: 8,899
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And I know I said it much earlier in this thread, but I still can't believe how much better my 1500 rides with 4 psi less in each tire than GM "recommends"
GM's recommended psi is for max load, I rarely carry much weight. When I am getting a load of top soil or mulch I just pump them up. Plus I like how it annoys Onstar that thinks my air pressure is low
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2017 GMC Sierra 1500 SLE 2020 Fusion Titanium |
08-08-2019, 05:03 PM | #32 | |
Relic
Join Date: Oct 2003
Location: Bethesda, MD
Posts: 12,458
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Quote:
Tire wear is WAY better this way, too.
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2011 M3 2006 Sierra 2500HD 4WD LBZ/Allison 2004 X5 3.0i 6MT 1995 M3 S50B32 1990 325is 1989 M3 S54B32 Hers: 1989 325iX 1996 911 Turbo |
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08-08-2019, 05:48 PM | #33 | |
Mugwump
Join Date: Oct 2003
Carmudgeonly Ride: E46 330i, Chevy Colorado, Tesla Model 3
Location: NY
Posts: 17,475
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Quote:
Colorado's recommended is 35. I'm running 34/33. I can try 30 At what point to 255/65R17 truck tires start to get weird? Doesn't that require me to remove 500 lbs of stuff every time I want to use it as a truck? With the stock shocks it can get a bit out of control. With the Fox shocks, handled very well. |
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08-08-2019, 07:57 PM | #34 | |
older fart than ZBB
Join Date: Oct 2003
Location: On the road again
Posts: 8,899
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Quote:
My F550 had air suspension on the rear axle, I didn't want to mess with air pressure on the dually tires, so I mounted a second limit switch on the suspension so I could run different air pressure on the air bags between loaded and unloaded. My 5th wheel pin weight was about 5600 pounds! Truck drove so smooth when loaded, but until I added the second switch it sucked driving the truck after unhooking the 5th wheel.
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2017 GMC Sierra 1500 SLE 2020 Fusion Titanium |
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08-09-2019, 10:10 AM | #35 | |
Relic
Join Date: Oct 2003
Location: Bethesda, MD
Posts: 12,458
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Quote:
But mostly, I was thinking that you'd try it for starters and see. You know, throw a couple sets of wheels in the back and see if it rides better. And yes, the specified rear tire pressure for my truck is 80 pounds per square inch. With 50 up front, which makes that easy. If they are running identical pressures front and rear, you aren't going to have the opportunity to do much. I'll also note that the Michelin all season tires ride a lot better than the Bridgestones it came with, or the Bridgestone A/T tires I was talked into putting on (and regretted).
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2011 M3 2006 Sierra 2500HD 4WD LBZ/Allison 2004 X5 3.0i 6MT 1995 M3 S50B32 1990 325is 1989 M3 S54B32 Hers: 1989 325iX 1996 911 Turbo |
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08-09-2019, 01:19 PM | #36 |
No more BMWs
Join Date: Apr 2005
Carmudgeonly Ride: Ram, MS3, CX-5, RX-8
Location: Glenwood, MD
Posts: 14,753
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I air down the ram rear tires in the winter but in the spring they live at 80, which is the common max load inflation pressure for a load range E tire.
It does ride better with the rear at 60psi. For a mid size truck if be hesitant to go lower than the recommended pressures. The side walls on those tires are generally super weak. |
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