Bike Liquidators Sunlite Utili-T Schrader Valve Tubes 29 x 2.00-2.40 700x47-52 SV35 FFW56mm 63624 (1 Pack)

I upgraded my tires to 2.4" wide CSTs. The Sunlite were the least expensive name-brand tube I could find. They're also lighter than the tubes I found at the LBS.So far, they've been great. No flats.