Topeak Aero Wedge Pack Bicycle Bag with Strap Mount

I had difficulty deciding between this Topeak seat bag and the Avenir Bigmouth Velcro Seat Bag (Large- 73/106 Cubic Inches). I also had difficulty deciding between the medium and large size Topeak seat bags. I wanted the largest seat bag I could get but I didn't want the chance that it would rub on my legs while pedaling. For certain, Topeak's website and catalog have a dizzying array of seatbags. I would have preferred the Aero wedge that has the "fixer" (the plastic connection to the seat), but I read far too many reviews stating that the plastic breaks far too easily.In the end, I'm glad I chose the large Topeak seat bag for my Trek DS 8.5 hybrid with stock seat. It fits perfectly under the seat and doesn't interfere while pedaling (see update below). The straps hold it very tightly to the underside of the seat and to the seatpost. The bag also has flexibility that allows it to be shifted in a downward direction on the seatpost rather than hanging the bulk of the bag from the bottom of the seat. For example, since my seatpost is rather high, I can shift the bulk of the bag onto the seatpost. I think it's better than the Avenir Bigmouth bag for one reason: The Topeak's cornucopia shape allows it to hug the seatpost a little better whereas the Avenir Bigmouth, to me, just looks like a big chunk hanging underneath the seat.The bag has a zippered expandable section. With the bag in its fully open position, I can fit the following items (see my additional uploaded pictures):IceToolz Steel Tire Levers Set, 3 Piece2 valve adapters (Kool Stop Brass Card/12 PV Valve Adaptor (Pack of 12)) inside the patch kitInnovations Air Chuck Elite Inflator including sleeve and CO2 cartridge3 additional 16-gram CO2 cartridges3" Pocket knifeReplacement 29er tire tube2 AA batteries in plastic storage case for my GPS4 AAA batteries in a plastic storage case for my Portland Design Works Radbot 1000 1W LED Tail Light2 CR123 batteries in a plastic storage case for the Fenix PD30 flashlight/headlightFenix PD30R2 6 Level 235 Lumen LED FlashlightBeretta 84FS small frame pistol in holster (biggest item by far in the bag)Park Tool VP-1 Vulcanizing Patch KitDriver's license & other identification and a little cash in a tiny envelopeThere's a bit more room to spare for a couple more items the size of CO2 cartridges, but there's no room left for a sandwich, wallet, or snack bar.One minor gripe. With the bag tight against the seat bottom, it's a little difficult to get the zipper open. Other than that, I'm so pleased with the bag that I also bought one for my wife's bike.Update: After getting more comfortable with the bike, I decided to adjust the stock seat forward for better posture. My legs now do touch the bag a bit while pedaling since I'm not able to move the bag toward the rear as far as I used to. I guess your mileage may vary depending on how your seat is positioned, and different seat bags that hang further back rather than snaking down the seatpost are probably less likely to interfere while pedaling. See extra uploaded pictures for a "top down" view of the bag under the seat. To solve this problem, I put two heavy duty zip strips at the appropriate height on my seat stem. This prevents the bottom velcro from sliding down the stem further than I wish. It works perfectly and prevents the bag from getting in the way of my legs while pedaling.Also, be careful when carrying a lot of weight and attempting to use this on mountainbiking trails. After carrying the items listed above on intermediate singletrack for about 15 miles, the rear seam of the bag ripped. (See additional uploaded picture). I foresee no problem when using this bag on smooth trails, but--depending on the weight you're carrying--it might not be sturdy enough for offroad trails. I repaired my bag with heavy duty black quilting thread and just kept on trucking.

I bought this to upgrade my bicycling experience and help with commuting. This product fits everything I need to carry on the average day, and fits perfectly under the seat of my bicycle. It is also super easy to clean, I rode though a mud puddle and was able to easily clean the mud off with a moist towel.

Clever design. I have owned it for several months now and have really put it through its paces on my mountain bike. A lot of the others I have owned start to break down or fall apart, or show some other design defect by now. This one has been flawless.It is amazing but most saddle bags will not hold a modern mobile device. For whatever reason, the designers look at them and say " let's design it just a bit too small to hold a phone." So dumb!This one, however, even has two elastic straps along the top to keep your phone snug. At first I thought this bag would be a little too large but now I have come to appreciate the extra space to include full finger gloves along with the regular accessories. It does not interfere with my riding at all and acts as a mud guard to a decent extent. The zippers tend to become very difficult to use on many of these bags, after a few weeks if getting some mud and dirt on them. It is something to be watchful when purchasing one. In the store, they look great but then on the trail, it can become a different story. I have had several fall apart there. Look and see if the zipper beefy enough. On this one, I can say the zipper is holding up exceptionally well and the entire bag is pretty dirty right now, as it should be...

Pros: I bought the Large size, which effectively fits everything I need for a 2-5 hour bike ride. It holds a small bike pump, two inner tubes (25-32c), a multi-tool, two tire levers, a patch kit, electrical tape, 1-2 emergency tire boots, a chain tool, a set of missing chain links, and still has room for a small bike/seat lock or a small medical kit. The bike light strap is strong and reliable, and the overall look is great. Material is durable. I got it on sale for about $20, which feels like a great value, though I likely wouldn’t have paid full price.Cons: I wish there was a better way to fasten the bottom strap that connects to the bottom of the seat post, as there’s excess Velcro when I fully tighten it. There’s no space for a bike reflector on the seat post unless you have a high seat post.

This does the job. Put this on my 29er hardball and the large size cleared my tires by 1/2 inch with no wheel rub after first ride. Hope it lasts a long time.

I own 3 of these in large. I do a lot of commuting, distance road biking and a little mountain biking too. Easily put on 8-10 k a year. Two of these bags I bought 4 years ago and are still in great shape after thousands of miles. I like the strap set up as you can get leverage from both sides to help keep the bag from moving. The large size does stick out a few inches off the back of the SMP pro saddles on my Le Mond road bikes but I like the extra room. Do not mind the look. Rather be able to store stuff in the bag, leave my jersey for food and other more quick access stuff on long rides. Only will wear a backpack if I know I do not have access to refill water bottles along the way, it’s crazy hot and on a long ride. I can get a tube, two CO cartridges, CO injector, patch kit, levers, tissues, small multi tool, chap stick, keys, wallet and iPhone XR in without having to even expand it. No banging around or movement from the bag. I could cram another tube in there if I wanted. For long 100+ mile rides it is nice to have a bit extra room on the expansion for more gels and bars. I looked around at other bags but ordered another one of these in large to replace a bag on my other mountain bike. Put a new seat on it and my old sunlite bag can not attach to it right. I know this bag will work. No brainer!