Ranger Medium Bike Saddle Bag – Compact Under Seat Cycling Pack for Road, Gravel & MTB – Waterproof, Rattle-Free Tool Storage – Lightweight Bike Gear Bag with Safety Strap – Orange

The best saddle bag i've come across. No zipper to dry out, get stuck or break. No velcro around the seatpost (works with my dropper post just fine). Plenty of room for MTB trail stuffs: 2x20g threaded CO2 & head, 1 tire lever wrapped with some tape, Crank Bros 19 tool, tubeless plug kit, lightweight 26" presta tube (which works for 27.5 or 29), spare link, spare derailleur hangar, spare valve core, tire boot material with a bit of room to spare. It wraps around seat rails very securely and compresses nicely-no rattles. It looks pretty small when attached to saddle considering all that it contains. The wide strap and good velcro seem quite secure but I still back it up with a toe strap for ease of mind. Easy on/off when needed. Water and muck proof. Probably going to get one for my road bike.

This is exactly what I've been looking for; it sits right below the saddle and holds the essentials. I ride a Cannondale Supersix Evo road bike with a Specialized Power Pro saddle. This sits ride below the saddle and I have in it a Crank Brothers multi tool, 2 Park Tool tire levers, 1 Continental 700x25 inner tube, 2 CO2 16g cartridges, Portland Design Works CO2 inflator, a small glueless Park Tool patch kit, and 1 Park Tool tire boot. That leaves me with extra room so I can fit my iPhone 5S or some keys and a small wallet if you don't want them in your jersey. I haven't tried an extra road tube but it looks like it fits so that you can fit 2 road tubes, and small items like the inflator and glueless patch kit. The bag comes off really easy and doesn't move while you ride!

Great saddle bag. I have been using this on my MTB bike for the past 6 months (~50 rides) and have no complaints.You probably only want to keep emergency items in this bag, if you are going to be going in and out of a bag during your rides then a saddle bag with a zipper is a better idea.My setup:- I have a multi-tool (no chain breaker) attached to my water bottle cage- pump and phone in jersey pockets- all other emergency items in this bag- 29er tube- patch kit- 2 tire levers- chain breaker- extra 11-speed master link in plastic bag (extra room here for small items)Pics attachedBest feature of this bag is no rattling: attachment is secure and all items are tucked into their own section. I do add rubber band inside my patch kit to keep the glue from bouncing against the container.

A bit too small to fit CO2 in an insulating sleeve, my tire levers barely fit, and I haven't yet figured how to get it to strap to my saddle securely enough to be completely certain it keep wiggling when the going gets tough. In a few hundred more miles I'll be able to be more honest about it. I will say that it is light, compact, and just about everything I wanted to carry did fit, but I'm glad I went with the larger speed sleeve and not the tiny one.

This bag stays tight under the seat much better than any bag I've ever used. Enough room for a 27.5 tube, co2 thingy, and a big crank bros multi tool. The velcro doesn't seem like it's going to be a problem. I've ridden 10 times or so with it so far on single track rocky trails. I trust it.

An almost perfect saddle bag.pros:Smalllightweighteasy access to whats in bag.Looks really cool, almost like a mini bike packing bag.cons:I wish the compartments had some elasticity to them like the outvi possum. It is very difficult to put stuff back in if your tube is really big.The only way to access the stuff in the bag is to remove the bag from saddle it seems, unless i am doing something wrong?I had a Speedsleev Caddie Roll a feel years ago, that had the straps just come off the bag after about 3 months of use, this one seems a little more robustly made.

This works well with my dropper post and holds my 29" tube, CO2 cartridges, tire levers, and zip ties. The only improvement I would like to see is a longer velcro strap, as there is only about an inch of overlap when the pack is full. However, it is very sturdy, and I haven't worried about it coming off, even on some nasty downhills it hasn't budged. I like that it keeps everything covered so it doesn't get filthy, and I can keep little bits in there without worrying about them coming out.

Pros: Dropper compatible, reasonably priced, holds all core stuff I need. It's also relatively small, and cinches down so my tools don't rattle.Cons: Multi-tool slot is too small for most of my multi-tools so it just hangs out in the bag. Must be removed from seat to get to tools. This isn't a deal breaker but a little inconvenient at times.