Kenda Super Lite 29x1.9-2.3 Presta Tube
Kenda produces basic, reliable, inexpensive tubes, in a huge assortment of sizes. Now including all you 29er's. With a wall thickness of .73mm and a weight of only 180g. The Kenda Super light tube is perfect for your 29er beast.
This tube is much lighter than stock tubes however it is still just as durable. Never had a pinch flat with this tube and I am extremely satisfied with it. This is my go to tube because it is light and reliable.
I have had no pinch flats or issues with these tubes for about a year now. Much lighter than stock tubes.