19" tires start to ride pretty stiff when you get around and above 40lbs. Keep them as close to 38lbs as possible. Never to drop below 30. Not even to get to the gas station and fill up. Remember the side wall is soo small that although the gas station is only a block away by the time you got there you ruined your expensive tire. Invest in a portable pump if you don't already have one and keep the front at 36 and the rear at39. This will give you comfort aswell as long lasting tires and protection from bending your wheels. Enjoy and have fun with those wheels.

 

Thanks UP ON 3 Racing.
Thats what i thought. I was riding around yesterday and with the 44 lbs in the back the ride was extremely bumpy. I alos learned my lesson about running on these tires with low pressure. I had a leak because it is a 3 piece wheel and i didn't know and i ruined my back tire and had to get a new one.