Can someone help me on this issue. I just got a new RadRunner Plus with 20X3.3 tires. The manufacturer claims that tire pressure is on the side of the tire and that may be true, but after the highly reflective stripe is added and you have 74 year old eyes I cannot see if it there and what it might say. So can someone give me an idea of the correct pressure for my tires. Currently I'm keeping them at 30 PSI. Hope that's close. Thanks for any help.