Tire size for steers and drives?

Why not if tires load rate is same. Don't forget to change tire size in ECM or speedo and odometer will go off

 

What do you currently run 1122.5? Could all ways change the trailer over to match the truck

 

Are you running the 255/70's on a stepdeck or a flatbed?

What make/model truck and trailer do you drive and what is your operation like?

For the most part, the only trucks that run the 255/70"s are the car haulers because they need it for the vehicles height. Others do use them too but for trucks with overall height issues and the need to keep the deck low for loading/unloading they are a necessity .

 

Changing tire size is gonna required program change on the ecm “AND” a fine tune on the speedometer head “dip” switches. And there is a formula behind both. Hope your good with arithmetic.

 

Let's do some math real quick so we know what the difference is in tire height:
255/70/22.5 = 36.5" tall
11R/24.5 = 43.4" tall
285/75/24.5 = 41.4" tall
11R/22.5 = 41.4" tall
295/75/22.5 = 40.1" tall
275/80/22.5 = 39.8" tall

By switching to the 255's you can really make a drastic change in overall vehicle height but remember, whatever you lose up top you also lose in ground clearance with the shorter tire. Also, depending on the speed you like to operate at and the engine/trans/gears combination, a large change in tire height can move your cruise RPM enough to have a negative effect on your fuel economy due to the highér revolutions per mile from a shorter tire. Shorter tires will raise engine RPM and can move you out of the optimal cruise RPM your motor likes for it's best fuel economy.

If you switch to the 255/70/22.5 you can reference this post to see the difference.
255/70/22.5 = 36.5" tall

 

Don't forget to check the load rating for the steer tires.

 

One more thing, there are several other choices available too. Right off hand I could see the 275/70/22.5 on the tractor. You get the lower overall vehicle height but not sacrificing so much in the form of tire width and traction. This would be my personal choice if I really needed to lower my vehicle height. I know you said you wanted to run the worn steers/drives on the trailer but with a step deck you only have one real option for the trailer in tire sizes. Do your research and make an informed decision so you don't limit your capabilities and it will work out for you. Good luck driver.