Well I just picked up a brand new set of lt255/85R16 mud terrains km's for my 1994 ram 3500 4x4. Does anyone have experience running these on a dually, or SRW? How well do they fit? Is a small spacer needed in the rear? How well do they wear, handle, and sound?

I thought it would be a great tire for me because I could run them in the rear without a large 2" or 1.5" spacer. I did not want them to stick out with a big spacer, but I still wanted a tall tire.

How often should one rotate mud tires? every 3k? 5k?

Also, what pressure should I run with these tires on my dually, front, and rear pressures? 65 psi front? and 30 - 35 psi back?

If anyone has pics of these on their dually, or even their srw, post them so I can check them out.

Thanks.

 

Somebody? Anybody? So nobody has 255's on their dually?

 

Hello.. Mcfly.. Anybody home..


Bump..

 

They were on the truck in my sig when I first bought it. Not a dually, I liked the look, performance was good. They hadn't been rotated properly by the PO, so I can't really tell you how well they wore. I changed to a smaller tire when I bought new ones, but I'll either go back to the 255's or to a 285/75. I think they will be too wide for a dually without a spacer. JMO

 

I'm thinking of the KM2's but I saw a doooley with 235/85/16's and that was with out a spacer. trying to find link I was reading up on km2's


http://www.cumminsforum.com/forum/ti...d-tonight.html

 

They'll fit the newer 2nd gen dually's without a spacer, but not the older ones. You might need a 2in or so. I run the pressures in mine 55 in front and 50 in the rear. Rotate every 5000 or so and they should last 40-50,000 miles. Good tires!!

 

So they will not fit all 2nd Gen duallys, only the newer second gens without a spacer? I did not know this. The offset must be greater on the newer second gen wheels. I know I will not need a 2" spacer. There is no way 255's require a 2" spacer. I would say 0.5" at the most, if I had to guess.

 

no you dont need spacers if u haul somethin heavy they will prolly rub though

 

I have that same size in bf goodritch mud terrain on my pickup they don't need spacers at all at most one of the side lugs touch but won't cause a problem. I haul a 11.5 ft camper and tow a four horse trailer sometimes my rear axle has weighed about 9800 lbs. with no problems. 60-65 down freeway or driving up to hat point, on the rim of hells canyon. that road is 22 miles of gravel, going from 1900 ft elevation to about 6900 ft. gross wieght of about 20000 lbs whent up in 2nd-3rd gear mostly. came down in the same on the pac-brake, almost no need for brakes. Only problem is now with 3.55 gears it's a little high geared.

 

Well that is good news. I just mounted them up myself. I did not want the monkeys at the local tire shop to ruin my truck. I am going to take them to get balanced tomorrow. Unloaded they have around 3/8" between them.

 

Prolly will be okay & if you get a load on it make sure to air them up & look @ the gap.

 

My truck has the steel wheels with I think eight holes, factory wheels, I don't think I could get the sidewalls to touch. I have hauled dirt, firewood, gooseneck with bobcat, etc. Mine have 65psi, empty they only have about 2/3 of the tread on pavement. With my old tires I ran 45psi, most of the tread was on pavement. I think their is a difference in offset on the dually wheels, the old ones and some of the chevy's look closer.

 

I installed an 8mm spacer when I mounted up my wheels on the truck last night. The first wheel was centered on the hub, then I installed the spacer, and then the outer wheel. It was off the centering portion of the hub, so I took someone's advice and used two conical lug nuts to center the wheel and lock it down. Then I installed the other 6 flat nuts, torqued them down. Then I took off the two conical nuts, and replaced them with flat nuts, all 8 torqued to 145 lb-ft.

Does anyone else use this centering method with their spacers? I was told it works well, but technically it does not allow the load to rest on the hub. I have not heard of any issues with this method. I have plenty of gap between duals with the 8mm spacer.

 

There is a picture in this thread:

https://www.dieseltruckresource.com/...s-t217298.html