need 2 new bridgestone steering tires

Why must it be Bridgestone? Michelin tires have the lowest rolling resistance...

 

you can mix tire sizes between steers and drives. you just cant mix tire sizes between drives and drives or trailer and trailer.basicly your sizes need to be the same between your axel groups. say for example you have low profile 24.5's on your steers tall 22.5's on all 8 drives and tall 24.5's all 8 trailer tires.

otherwise how would a class b dump truck be able to run flotation tires on the steers and regular tires on the drives.

unless your tire plan includes rotating steers to drive and drives to trailers

for the moment i have 11r22.5s on my drives and low pro 22.5's on my steers. iv seen guys that run 24's on there steers and 22's on the drives

 

Open the driver's door to your truck and then look on the door jamb area. Unless it's been torn off or otherwise missing there will be a factory sticker telling you the tire sizes and recommended inflation pressures.