lighter weight oil = better MPG???
BOMBARDIER
Joined: Oct 2007
Posts: 8,208
Likes: 630
I took my E rated tires off as fast as I could, it was almost unsafe with how stiff it went over bumps. My new D rated Pro-Comps have just as high of a load rating however in lbs.
FWIW, every tire I've run I've typically run right about the max labeled on the sidewall and the rears ALWAYS wear out in the middle first. Fronts seem ok. My rear tires really need less air in them. I'd imagine if you were towing a lot, it'd probably be ok though.
FWIW, every tire I've run I've typically run right about the max labeled on the sidewall and the rears ALWAYS wear out in the middle first. Fronts seem ok. My rear tires really need less air in them. I'd imagine if you were towing a lot, it'd probably be ok though.
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Diesel Bomber
Joined: Dec 2010
Posts: 1,190
Likes: 113
From: Fool's Golden State
1 ton. (2500HD) dont think GM makes a 3/4 ton with a diesel
Diesel Enthusiast
Joined: Feb 2012
Posts: 427
Likes: 38
From: G.I. Nebraska
I put a large air dam under my front bumper to move the air around the truck,rather than between the front axle, frame, transfer case, etc. , that helped a bit. I'd also check out Airtab.com, they got me 32 mpg on my 88 Accord, up from 30. Unfortunately my Dodge is too curvy out back to install them for maximum effect.
Diesel Bomber
Joined: Mar 2010
Posts: 4,233
Likes: 434
From: Dansville NY
I took my E rated tires off as fast as I could, it was almost unsafe with how stiff it went over bumps. My new D rated Pro-Comps have just as high of a load rating however in lbs.
FWIW, every tire I've run I've typically run right about the max labeled on the sidewall and the rears ALWAYS wear out in the middle first. Fronts seem ok. My rear tires really need less air in them. I'd imagine if you were towing a lot, it'd probably be ok though.
FWIW, every tire I've run I've typically run right about the max labeled on the sidewall and the rears ALWAYS wear out in the middle first. Fronts seem ok. My rear tires really need less air in them. I'd imagine if you were towing a lot, it'd probably be ok though.
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but where they 305s? my stock 245 Es where 80 PSI max. i think the 285 Es where 70 or something.
most larger tires in the D range can hold just as much or more weight then the 245 E range can and have a lower max PSI.
these are the ones i have. talked them into about $165 each
Tire Details - Discount Tire
most larger tires in the D range can hold just as much or more weight then the 245 E range can and have a lower max PSI.
these are the ones i have. talked them into about $165 each
Tire Details - Discount Tire
Last edited by tiremann9669; Mar 12, 2012 at 10:58 AM. Reason: Automerged Doublepost
Diesel Enthusiast
Joined: Feb 2012
Posts: 427
Likes: 38
From: G.I. Nebraska
It depends on how much weight is on the tire. Industry group TIA, as well as several tire manufacturers, print charts that indicate how much air pressure will provide the best wear at given load weights. Check with you tire dealer, manufacturer's website, or just google it.
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Diesel Bomber
Joined: Dec 2010
Posts: 1,190
Likes: 113
From: Fool's Golden State
my 245/75/16 "E" tires where rated at 3042 lbs at 80PSI & my current tires 305/70/16 "E" are 3525 lbs at 65 PSI
right now i am running at 65 PSI and seems to be wearing fine. guess i will see in a couple of years...
right now i am running at 65 PSI and seems to be wearing fine. guess i will see in a couple of years...
Diesel Enthusiast
Joined: Feb 2012
Posts: 427
Likes: 38
From: G.I. Nebraska
Required by who? The DOT just requires that the weight on the tire not exceed that tires rating at the air pressure its currently at. If you have a larger tire, or always run empty, a D or even C rated tire may be legal at the appropriate pressure, not to exceed the sidewall rating. Then again, GM is liable to deny warranty service if you run a different tire size than they specify.
I thought a 3500 is a one ton, and a 2500 is 3/4 ton.
I thought a 3500 is a one ton, and a 2500 is 3/4 ton.
Diesel Enthusiast
Joined: Oct 2008
Posts: 286
Likes: 25
Required by who? The DOT just requires that the weight on the tire not exceed that tires rating at the air pressure its currently at. If you have a larger tire, or always run empty, a D or even C rated tire may be legal at the appropriate pressure, not to exceed the sidewall rating. Then again, GM is liable to deny warranty service if you run a different tire size than they specify.
I thought a 3500 is a one ton, and a 2500 is 3/4 ton.
I thought a 3500 is a one ton, and a 2500 is 3/4 ton.
