Quote from Ric_Clark on Jun 8th, 2011, 9:36am:
OK, I am about around 230 lbs., the ICE trike is around 45 lbs = 275 lbs.....how much tire pressure should I have for my 20" wheels?????
Ric, it's not the diameter of your wheels that matters, it's the width of your tires... I'm going to assume that you're running 1.25" (32mm) tires. If your weight was evenly distributed between all three wheels, that would be ~90 pounds of load, so you find where the 32mm line intersects with the 90 pound column, and look to the left for pressure -- in this case, around 52psi. If you're running 1.1" tires, it's 65-70 psi.
HOWEVER, your weight isn't evenly distributed among all three wheels - but with a trike, it's easy to put a bathroom scale under each wheel and have someone else read it as you sit in the trike... Your rear wheels should have equal weights, but may be different than your front.
Let us know what you find out! Remember, this is just a recommendation of starting pressure -- modify it as your mileage varies... but I am still running my front 1.1" tire on the Xstream at 80psi instead of 110...