I love Conti GP4000's, on sale for $40.00 each at PBK and they include a tube. I know they are a tad expensive but, i'm 270 and have over 1500 miles on the tires with little wear. In addition to a pretty good price they are giving away Conti tubes with the purchase of each tire. Coupon code to use is USARPR for %5 off as well.