I have Continental HCS 14 R20 tires on our Saurer 6dm. The PSI rating on the sidewall is 120 psi. The tires currently have 95 psi in them since I bought the truck. The treadwear is not good. The center tread is wearing out faster than the outer tread. Under inflated tires, it’s usually the opposite. What is wrong here? Thanks!
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