I put my 15x4 ProStars on today with the 165r15 tires. The tire doesnt have distinct max tire pressure other than the load rating at 32 lbs. So I put 32 lbs in, I normally stick to 35 lbs in everything. The tires at 32 lbs seem to flatten out a little too much. I ended up putting 40 lbs in them to get it where I think the tire needs to be. What pressure are you guys running in your 165R15's??? -----Jeremy