2nd Gen Non-Engine/Transmission Tire sizes for a 1 ton Dually with 4.10 gears

[PWeber]

I have a 1996 1 ton auto with 4. 10 gears. Does anyone have expirience with going to taller tires that helped get better mileage by pulling the RPM down? I am willing to install spacers on the rears if that is what it takes. What size have you guys went to without spacers and with spacers how tall should I go? Also, does anyone have a matrix of actual height of all of these 235, 255, 285 tire sizes?

 

[Sticks]

Originally posted by PWeber

I have a 1996 1 ton auto with 4. 10 gears. Does anyone have expirience with going to taller tires that helped get better mileage by pulling the RPM down? I am willing to install spacers on the rears if that is what it takes. What size have you guys went to without spacers and with spacers how tall should I go? Also, does anyone have a matrix of actual height of all of these 235, 255, 285 tire sizes?

Run a search on tires and axle swap. I think that 255 will get you the equivialnt of 3:73. It might even be the 235's will do it.

 

[Cowboy Medic]

My truck had the 215's factory and I upped it to the 235/85's and only saw maybe a 1 mpg gain on interstate around town it was nothing. I have contemplated looking at getting spacers and moving to ta slightly larger tire, but was concerned with strength and reliability. Are there any compromises being made? I don't think the height would make a difference as far as the gooseneck trailers we use because there is still quite a bit of clearance, but I might be concerned if I pick up a fiver down the road for traveling.

 

[Midnight]

I replaced mine with 235's as did cowboy. The rpm dropped slightly thus bumping up my mileage, but not by much. I also replaced both inside rims with those of a 2000. They have a little more offset. The tires were fine until i towed the trailer(33ft golden falcon 5th whl) then they would rub on the insides, and that is just asking for an accident waiting to hapen.

 

[Koa Man]

I went to 235s and tire pressure needs to be kept up to avoid rubbing. 255s would not work. Tire shop put them on to check clearance and there was only about 1/4" with the bed empty. I need to get new tires real soon and may go back to 215s. I would really like to run 255s but need to get new rims first.

 

[Hookemupman]

I run 295x75x16 bfg all terrains with two inch spacers and they look good and get the rpm down a little,i also tow ever day with this truck and there holding up great. Good luck Jason

 

[GFoley]

PWeber,



Look at the BF Goodrich tires website for some real good measurements. I have looker at Toyo, Nitto, Goodyear, and others pages. Since BGF seems to offer the most different sizes it seems like a good place to me. The only differences in different brands of the same size MIGT be the actual wheel width it was mounted on when the #s were measured. I have only seen a noticeable difference in one size, and the 1" section width difference was exactly the difference in the rim width, 8" vs. 9".



My 99 2500 has the 6. 5x16" wheels. The only sizes that actually recommend a wheel this narrow is the 245/75 (OEM), 235/85, or the 255/85. If I decide to mount anything else most tire mfgrs suggest at least a 7" wheel and most are 8" based on the tires I am considering. Something is going to happen here real soon, I just can't decide yet.



Glenn

 

[hdtrukn]

quest for mpg

Hey

Been there tried that.

Going to a taller will lower your rpm @ say 70mph cruise, but if you go with a wider tire to get the height, you have increased rolling resistence. Also be carefull of tread pattern you choose,

more aggressive, more resistence.

I did both, wider tire and A/t instead of M/S tread.

Result was I'm down 2mpg.

Just my 2cents

Scott

 

[2-ND TIME]

tires

Go to the tire store that you trust and talk to them about the tires you have and want they will give you the tire RPM's and you can figure out the best for your type of driving needs. I hav 3. 54 215 85r 16 and went to 235's for a 560 to 530 RPM's the 5+%larger is nice and not too noticable.

 

[Sticks]

I was at Smas Club yesterday and I saw some 225/85 R16's. Has anyone tried those? All the talk is around the 215's or the 235's.

 

[onestackdram]

I DO run 255's on my 97 3500. I did have to use spacers, and got longer lugs for the rear. I can't report much better fuel mileage, but I can report that it did pull my RPM's down about 100. Not much but when your used to running almost 2700 just to get up to 70 MPH and now with the tires and a little better breathing engine and assorted other things, I now hit 70 at around 2400. With all of that said, as far as fitting goes I DO have a cab and chassis with a flatbed, therefore I have a little more room for larger wheels.

Now if your asking me is it worth the larger tires, there are pro's and cons of them. They really dont change much to awfully dramatically, but they do a little, and at that high an RPM I figured any change was welcomed. But certainly DONT do it just for MPG's its NOT worth it, NO change that is measureable.



Russell

 

[JohnMcIntyre]

19.5s perhaps?

Might be worth considering a 19. 5 rim with 225/70R rubber. I've had no complaints in two years. Only downside is the initial up front cost but you'll get over that soon enough

 

[2-ND TIME]

binary bits

16 2 8 , 256