Most seat bags are too small or too large. The mini is the perfect size for my needs. It has three compartments. In the center I have a 700x23 tube, left a 16g co2, right is a folding park chain tool. In the pocket of the zippered door I have a Park glueless patch kit and a spare Wipperman Connex link. I place a spoke wrench on the top of the other junk (not in a pocket) and zip up the door. This stuff is just for emergency. I pack most my stuff in my jersey pockets. Held on by two velcro straps, no need for a strap for the seatpost. No rattles. Well made. I'm pleased. If you need more room, get the small bag. Finally a seat bag that I like. Good product. No, I don't work for Banjo Brothers.
It's tight in there. But, there are interior pockets for CO2 and tire irons so the tube has nothing rubbing and the hard CO2 won't bang into your seat post because it's snug in the pocket.
i like this bag, it ataches well and doesnt come loose.and its the purfect size for a thin tube (700x23) 2 co2 tanks, multi tool and patches.mountain bike riders might want the next size larger for bigger tube storage.
I bought this bag for my restored 1972 ManuFrance road bike to carry a spare tube, a set of vintage tire irons that I bought when I switched over to clincher tires in college, and an old Velox patch kit that has been refilled a dozen times.
The Banjo Brothers deluxe seat bag holds all this stuff plus a couple of granola bars. The fit is great, it was easy to install and it looks super!
I have one of these bags on all three of my bikes, My TREK Madone, My TREK 7500 hybrid commuter and my Jamis Mtn Bike. I use them for carrying tire emergency gear. Each holds a spare tube, a set of tire levers and a CO2 inflator. There are some nice features too, there is a separate compartment that I use for carrying some $$ and each has a tether with a hook on the end that I use to stash a spare house key. They are well made and durable, easy to install and well worth the $$. The medium works well for the two street bikes, the Mtn Bike tube is a bit bulky (26X2.2) and required a step up to the larger size.