I am a Newbie with a 36 spoke 20" Schwinn.
I weigh 170 lbs.
How much air pressure should I be using?
Tire is a 20" by 1.75" street type tread.
Tire states 40 psi maximum.
From my vantage point, it still looks kind of low as I ride…
.(yea, I know “looks don’t count for much”)
You should be able to safely put 60 psig in the tire. Tubes are cheap at about 5 bucks if it blows. I run my 35 psig rated Coker tires at 50 psig all the time. I run 20" freestyle tires at 60 psig. I weigh about 200 lbs but that really has no bearing on the safe pressure, just the tire footprint.