Your road bike's got two wheels, why not purchase tubes in pairs? The Hutchinson Twin Pack contains two standard butyl tubes for a nice compromise between lightweight and durability. Each tube has a presta valve which is 33mm in length.
Comments about Hutchinson Twin Pack 700c 33mm Presta Valve Tubes:
I bought these tubes along with same brand tires and I am as happy as a woodchuck in a lumber yard. Slipped these bad boys inside 2 new tires and took them on a 60 miles ride in the middle of Kansas. They worked just fine and before next organized ride I'm painting the dust covers green to give 'em the nitrogen look so I can be cool like the hot rod drivers in Kansas City.
Was this a gift?:
Bottom Line Yes, I would recommend this to a friend