i have a 08 dually and run factory 2225/75/17 on it. but at 80mph my rpms are like 2200 and thats real bad for mpgs i want to run 295/75/17 but need to know if any of you have done this i figure i will have to crank up the toursen bars and need dually spacers but pther then that anything i need to do?

Must be geared 4.10 to 1.

No you dont have to regear. I just put 285/75/16s and love them. Im out of town working so all I did was jackup my bars and 2" spacers from Rick`s. I will be sticking a Level Kit underneath when I get home. But heres Nicks 08 with the 295s. Great write up..... http://www.dieselplace.com/forum/sho...d.php?t=229623

Is this the linbk you where trying to post???

http://www.dieselplace.com/forum/showthread.php?t=229623



295's on mine.

Yeah thats it......Guess I screwed that link up. Thanks for the correction.

thanks for the input as far as regearing it that would make the whole reason for bigger tires and lowering my rpm for better mpgs not work

i am going with the 295 then

I love my 285's, still a lot of power and lower rpm's on the freeway.

I love my 285's, still a lot of power and lower rpm's on the freeway.
are you using a stock or after market rim? and can i put 285/75/16 in my stock 99 dodge dually. any input would be appreciate

i have a 08 dually and run factory 2225/75/17 on it. but at 80mph my rpms are like 2200 and thats real bad for mpgs i want to run 295/75/17 but need to know if any of you have done this i figure i will have to crank up the toursen bars and need dually spacers but pther then that anything i need to do?

Dude it's not the RPM's that are killing your mileage it's the 80 mph. Lowering the RPM's will probably help some but you'll still be pushing a lot of air which is what really sucks the fuel down.

are you using a stock or after market rim? and can i put 285/75/16 in my stock 99 dodge dually. any input would be appreciate
I put 285/75/16s under mine last week. You`ll need wheel spacers under the rear. I dont know how clearness will be under the front of a dodge. But I dont hink you`ll have a problem.

yeah the 80 mph is not helping thats for sure will have to try going a little slower lol

are you using a stock or after market rim? and can i put 285/75/16 in my stock 99 dodge dually. any input would be appreciate




I have stock rims but I have a 2 1/2" spacer. a 1 1/2" would work too. that is the same size tire I have on my 6 inch wide rims.

I have stock rims but I have a 2 1/2" spacer. a 1 1/2" would work too. that is the same size tire I have on my 6 inch wide rims.
Bad thing about 1 1/2" spacers is that your are going to have to cut the ends off your studs for them to work.