Dakine
Hot Laps Gripper Frame Bag

I use the frame bag to hold a 650b tube, CO2 cartridges (2), and 1 tire iron. Fits my oversize Foes downtube and holds tight. 650b fits tight, so no movement, very secure on the frame, not sure how great a 29er tube fit would be though.

This is a great little pouch that holds everything i used to keep in a bulky seat bas or frame bag. Not water proof, but it's dry here everything in there can get wet. Super easy to take on and off for access.

The Dakine Hot Laps does the job with no wasted space. I have the very eye catching red/orange color one and love it. Fortunately I haven't had to use the contents I carry. A spare tube, lever to take off tire and a small multi tool. You can't go wrong with this product.

After years of riding with a traditional camelbak I started leaving it at home on shorter rides, and now I like riding that way so much that I'll do what I can to take no pack on pretty much any length ride. This little guy is a big help in making that possible, and it's not every day you can find a bike part that changes your experience so much for so little money!! It's a pretty basic item, but it works well and very securely holds a tube, two C02s, tire lever, and mutli-tool.

If your'e debating between this or just taping/strapping a tube to your frame, I highly recommend going for this. Being able to easily access and re-attach your stuff is much more convenient. I used to have my stuff strapped to my frame with a voile ski strap. That worked really well, except it was a bit of a pain to take off and put back together so I found myself mooching tools from buddies to avoid having to mess with it. This bag makes it easy to access your own tools whenever you need them.