Timbuk2 Seat Pack XT $27.95
It's right there.
Nothing beats the convenience of an under-seat pack. Not that they're very large: the Timbuk2 Medium Seat Pack XT is 6.7x3.9x3 inches, but once you have your important items stashed in the seat pack, they're there when you need them. Stash a spare tube, a patch kit, a multi-tool, and some extra chain in case of the typical mechanical failures.
The Timbuk2 Seat Pack XT comes in two sizes: Small (5.5x2.6x2in.) and Medium (6.7x3.9x3in.). It's available in Black, White, Gunmetal, Bixi Red/black, and Emerald/reso yellow/red.
What community has to say
Small is SMALL
- Familiarity: I've used it once or twice and have initial impressions
Ordered two of these, a medium and a small. The small is VERY small. As in "you can't fit your phone in it small." The medium is an adequate size for the essentials (CO2 inflator, patch kit, spare tube, phone, etc.). Our second issue was that the zipper is very stiff and cumbersome. Since the pack itself is fairly flexible, it was pretty difficult to open the zipper without using both hands to hold the pack just right to get the zipper past the bottom of your seat. Ended up returning both and will try something else.
Fits REI Bike!!
I was a bit worried this bag might not fit right on my Novara Carema Pro bike from REI but to my delight I got the Medium, White which not only fits extremely well but it matches my bike to a "T". I can fit a tire tube, CO2 inflator and extra cartridges, and tool kit. I haven't tried yet but I might be able to even get a power bar in there too! Love the fit of this bag for my bike.
- Familiarity: I've used it several times
you can fit everything you need in this bag, I ride with an extra tube, tire repair kit, 17 tool kit, and my cell phone.. so you can carry what ever you need to complete your ride, and make sure you have every thing!