Who da thunk?? The nice guy that sold me my bike stressed the importance of checking the tire pressure daily. I was, like, sure. Yesterday was our first ride and sure enough when we got ready to ride tonight I felt the tire. Felt pretty darn rock hard. The tires call for 120 psi (check the tires to know what pressure you need); my tires were at 90 psi. What the?? Anyway, I just wanted to share with any other new riders to make sure you air up daily. We have the handy dandy standing pump with the pressure guage built in. Easy to use. Have fun!!