I love my Sun EZ-1, but the 16x1.75 front tire needs air before every ride, and 3/4 through today's three-hour ride it needed air again. It has the stock 40psi-max tire in front right now. Will I see improvement a 16x2.00 or 16x1.75 with 60psi? Almost all of the 16x1.75's I've seen advertised are rated to 65psi, and the wider is attractive too, Topeka surfaces have their gaps.