I purchased a small bag intending to use it as a tool bag I could leave on the bike. I have a Toppeak Beamrack and found that with the rack as low as I could position it there is still not room for the bag. I kept the bag because I expect to find a use for it in the future and it looks as if it will be durable but I can't comment on how it actually performs. This is not a problem with the bag, just a compatibility issue with two add on accessories. The Beamrack has a raised bar at the front which the various baskets and bags attach to that caused the interference. A flat rack would probably allow the bag to fit, but I like the quick on, quick off mount so that is what stays for now.
The medium size (with zipper expansion if needed) fits nicely within my 145mm saddle dimensions, is secure and well-made. Swallows a bagged 25mm tube, tire tools, multi-tool, wallet and clamshell cellphone, couple tubes of Neosporin, couple individually wrapped sterile wipes, eye drops, cut-tire patch. I've used the zipper'd expansion only once, but it came in handy. (Riding home holding an acquired item in one hand is such a drag.) Would buy again. (Would have preferred dual zippers on the back, but all the other features still add up to best I've used.)
Nothing fancy. They work well, come in various sizes and work. I have 5 or 6 of them on various bikes.
I have a smaller version of this pack for my road bicycle. It has proven to be quite durable over several years' use. I got this larger version for my MTB. The fabric on the inside has already started to tear. The design of this "updated" version of the pack is actually less practical. On the older bags, the seat post strap was adjustable to grip the post tightly. This new version has the strap fixed to the bag, and allows only a very small amount of Velcro to connect. A very poor design change.
Overall this is a pretty good wedge pack. I bought this because the setback post on my Domane SL6 severely limits the underseat packs I can use and this was one of the few that works. The straps do a decent job stabilizing the pack under the rails, but there is some bounce with them. The biggest beef I have with the pack is its hard to unzip the waterproofed zipper because the pack isn't quite long enough to stick out beyond the rear lip of the seat, requiring some mildly annoying fiddling to get it open - definitely not a one-handed job by any stretch. The light loop is well-placed and wide enough to accommodate most taillights. The interior mesh pocket is perfect for a multitool.
Got this size small pack for my wife's new gravel bike. I like the way this style of pack provides a vertical mounting surface for tail lights. She is short so there is little space for a pack between the saddle and the tire. I use the medium pack on my bikes but am much taller, space below the saddle is not an issue. On my wife's bike there is only 1/2" between this pack and the tire so I recommend some changes to the pack design to make it more usable for the "little" people among us. As you can see in the picture of the pack, the zipper pull hangs an inch below which results in it rubbing the tire. Have to leave it partially open to avoid this. A dual pull zipper which closes at the top would eliminate this problem. The rear adjustment straps adjust from the bottom and the excess left over when tightened hang down and rub the tire. Move the adjustment part of the strap to the top to eliminate this. For safety, I bought a Garmin radar/light to alert her of cars approaching. There is no room on her seat post to mount the radar so it has to go on the pack. The tail light mount is on the bottom so the radar would rub the tire if mounted there. Had to move the tail light mount to the top rear of the pack where the Topeak logo was to make room for the radar/tail light. Topeak, are you listening?
You've got all kinds of junk in the trunk- tubes, tire boots, tire levers, CO2 cartridges, CO2 inflator, house keys, ID... You need one of these, and you need one that isn't going to fall apart after one season. And here you are. Do it. These are tough, ripstop, and the buckles are sturdy. I put in 4-5K miles/year, and this bag shows no signs of real wear. Would purchase again.
Can fit a tube, C02, powerbar inside, a wind jacket when expanded.
Would have preferred the XL size, but this one still works with the dropper seat post all most all the way down.
Zippers feel a bit cheap and snag if there is any load, but otherwise well designed.
Even works with a Mtn bike fender on seatpost below, if seat is up high.
Overall happy, just wish zippers were beefier and size was a bit larger for an extra layer like a wind vest.
I have several different brands, and this is is among my favorites. Straps hold the bag firmly in place, and it has a small pocket on the opening flap. My only suggestion for improvement would be on the elastic loops underneath, I use these to hold a spare tire and the could be a little more generous in size. Better yet, have an adjustable nylon strep with a buckle for easy attachment and removal.
The medium version is perfect if (like me) you want to carry 2x-tubes, 3x CO2, inflator, tire levers and a mini-tool. Mounting is easy and stable (go w the strap & buckle option). Bag size will not bump your legs if properly mounted.
Pack is very well made and very durable. Ability to expand makes it very versatile. Hold all the essentials tire stuff yet also has room for gels and more. My third pack from this manufacturer.
This pack (large) allows me to carry all my tire repair and first aid gear for long rides.
Will using this Topeak Aero Wedge Pack for the Dirty Kanza and other Gravel Grinders. Pack has lots of storage for a seat pack.
It's a wedge pack, so not much to say other than it functions exactly as I hoped. Attaches very securely without fuss, no movement or rattling. Small, but holds two tubes, two C02 cartridges, a C02 inflator, patch kit, multi-tool and one misc. item (energy bar, keys etc.). Simple and clean design. I'm so far very happy.
This is my second bag. First one had one of the straps wear out around the seat rail but lasted for years.
Its good for a couple tubes, levers, multitool, cartridges, and a few other odds and ends.
After years of fussing around with various size and attachment methods, I've settled on this pack as the most versatile option for single day rides on road or cross bikes. Size small is the right size. Medium is too big unless you want to fit 2 29'er tubes - otherwise a small will fit 2 cx tubes with room to spare.
Don't bother with Velcro or custom attachment methods (fizik).. go with straps and clips like the topeak.
Downsides not at all waterproof. Pack can bump legs depending on position.
The thing I don't like is you have to unhook the bag from your seatpost to get anything in or out. Very inconvenient.
I own the medium size and this was a gift for my son in a small size which he loves. Very durable and capacious.
Fits nicely under seat.
The medium is tight for anything more than a tube and a few tools. It's virtually impossible to squeeze in a wallet and cellphone. But my biggest frustration is the placement of the zipper. With the bag snugged up tight under the seat (which I assume is how it's supposed to work) you have to squeeze your fingers between the bottom of the seat and the bag to open or close it.
