I have both the 4.1L and the 1.6L sizes. There isn't much point to the 1.6L since the 4.1L can fold down to almost the same size.
The 4.1L can hold all the tubes and layers for a multi-day ride/brevet.
The sturdy seat rail clamp stops any swaying of the bag.
The clamp doesn't work well with some seats/seat-rails, especially if the seat is pushed all the way forward on the seatpost. It works fine on my Pro Stealth seat.
I reallly like this saddle bag. It's large enough to be useful but not so big that it seems unweildy. Well made, sturdy, and waterproof. Detaches and reattaches with ease.
Ortlieb knows how to make bags. This is roomy. I'm only using half the space. In summer I can add a light rain/wind jacket. I have a small coffee shop lock , pump, multi tool. Sealant and tubeless tools. Room for a couple of bars and gel's. It fits behind my legs when I ride for very little drag. All straps and buckles work perfectly. It's waterproof. It looks good.
Was recently on a ride and it just poured. Nothing got wet!
This bag was bought to replace a frame bag.
The bag is easy to install.
Right now it holds two tubes, a mini morph pump and some other tools. It still has adequate space to hold a great deal more for a day trip.
My Lezyne light clips on to the back and is highly visible.
The bag is waterproof, made extremely well and acts as a half fender for the rain.
It is a purchase you will not regret.
I store a spare inner tube and tire changing equipment including a compact pump in the bag and I could fit more stuff in there if needed. My only gripe is the means of attaching a rear blinking light. It's a little tricky but I made it work.
The volume of this bag is good for a thin jacket a wind breaker, repair tools and a phone. Perfect for a day ride
Better than all the rest, regardless of price but cheaper too! This is a review of the largest version which is slightly over 4L. Very light, easily to load, watertight. Most critically, it is very adjustable to the load, always positioning the light mount perpendicular. I mount my radar unit there, and it secure and easy to position. This thing is great for carrying extra clothing in winter.
Very happy with the quality of the seat bag. I purchased the 4.1L bag which is large enough to carry a pump, tube, repair kit, water bottle, and additional snacks. Would be nice to have a pressure release valve but I have been able to vent the air manually with no issues.
Seat bag attaches securely to the rails on your seat. Best to remove seat and post from frame for easiest attachment. Bag is the right size for carrying emergency tools, spare tube, possibly a thin jacket. I attached a Lezyne Alert Drive light to the rear of the bag for best visibility.
I've purchased several of these seat bags. They tuck under the seat. They adjust for the distance between the seat post and the attachment point. They are well designed, lightweight and waterproof. Reasonably priced.
Love this bag and the way it secures under the seat. Almost got the size smaller but glad I didn�t. Perfect for my trail bike.
Ortlieb makes good stuff. This isn't easy to set up and hold s enough for a long road ride, all the tools I need and an extra tube and even my wind jacket
Used this bag on Ragbrai in 2019. It great because of the way it expands. We love the way it goes on and off.
