Steer axle

[Waterloo]

They are the X**3+ from 2014, they are now the XZA3+. Mine are 16 ply 22.5 LP, run them at 120 psi. I picked them up at the TA in New Braunfels Texas. $1550 installed with high speed balance. The two regional tires I removed were sold to the Landstar driver in the bay next to me for $200, he needed some drive tires so I gladly sold him mine. So $1350 out the door. That was in January of 2015, and like I stated, they have been wearing like iron. I just had them up to the local tire shop, Meekhoff Tire up here in Michigan and asked about rotating them. He came out and checked them and said not yet, come back in the fall. ;-)

As far as the ABS, I would not worry. Here is a link, you can see all available sizes here. http://www.michelintruck.com/tires-and-r...e-energy-z

And I am sure you are running what most all ProStars leave the factory with size wise. I have metrics on the back, has not affected anything.