I am about 14,400 lbs on the front axle, so 7400 lbs was within my weight limit so I did not need to do any changes. My wheels are the stock Kenworth Alcoa wheels. There are also some psi limits for wheels you might need to be cautious of.
Yes, the 315's are a bit taller than my old 11R's. Did not affect steering clearance or suspension.
If I could find some of the 9 inch width wheels that would be better, but for now I am content with what I have. Being KW Alcoa the holes have a different shape than the std round holes in most Alcoa wheels. I need to check some big truck junkyards, won't be paying KW dealer parts prices for new, that's for sure.
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2005 Kenworth Showhauler 45 ft total length
twin screw, 450 hp ISX, 10 speed Ultrashift
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