In short. To choose how many liters a motorcycle tail bag should hold, it is not best to start with the number: liters measure the container, not the luggage. Nights away and the tent are what determine it.
- 40 L weekend alone in a hotel · 50 L one week or a weekend for two · 66 L one week with a tent · 90 L long self-sufficient trip.
- A tent and sleeping bag alone are worth moving up one size.
- On the LOBOO BWB series, the vent valve compresses the load: choosing a larger size does not create a balloon effect.
- IPX6 = water jets and heavy rain, not immersion.
- Prices from 54 € (40 L) to 72 € (90 L).
Nights away and the tent determine the volume, not the liters
The question always comes in the same form: «how many liters do I need?». And it is the wrong question, because liters do not measure the luggage: they measure the container's volume. The starting point is how many nights you will be away and whether you will sleep in a tent.
| How You Travel | Volume |
|---|---|
| Weekend, two or three nights in a hotel or B&B, traveling alone | 40 L |
| One week without camping, or a weekend for two | 50 L |
| One week with a tent and sleeping bag, or two weeks without camping | 66 L |
| Long self-sufficient trip: tent, sleeping mat, stove, changes of clothes | 90 L |
The practical rule
A tent and sleeping bag alone are worth moving up one size. If your trip includes sleeping outdoors, choose the volume on the row above the one you would have selected.
With the vent valve, choosing a larger size is not a mistake
With most tail bags, you pay for a large volume every day: when half empty, it becomes a balloon swaying behind your back and catches the wind.
How It Works
After closing the roll-top, the front vent valve expels excess air: the load is compressed and the bag adapts to the actual contents rather than its nominal volume. This is the technical reason why, with this series, you can size up without paying the price on days when you are carrying little.
IPX6 means driving rain, not immersion
“Waterproof” on its own is not a specification. IPX6 is, and it means something specific.
- high-pressure water jets
- driving rain
- wheel spray
- washing
- immersion: that requires IPX7, a different rating
- a poorly made roll-top closure
Why welded seams matter more than the fabric
The body is made of technical PVC with high-frequency welded seams, without stitching. This is what separates a waterproof bag from a water-repellent bag: where no needle has pierced the fabric, there is no hole to seal, and no heat-sealed tape to peel off after two seasons.
For a bag mounted over the tail, IPX6 is the right rating: water from a crossing cannot reach it under the seat.
The roll-top must be closed properly, otherwise the rating does not apply
This is the note the manufacturer puts in writing, and it is the main reason a waterproof bag gets its contents wet.
- Expel the air with the valve after filling the bag.
- Roll the edge for several full turns: the magnets embedded in the edge engage automatically.
- Close both buckles. One turn only, or just one buckle, and the stated seal no longer exists.
Patented magnetic roll-top
The closure is a LOBOO utility model patent (CN ZL 2019 2 1740293.1, as stated by the manufacturer). The advantage becomes apparent when wearing winter gloves, which is the only time a closure is truly put to the test.
The manual documents three ways to secure it
No luggage rack is needed: all you need are anchor points on the sides of the tail. The bag rests on the passenger seat or on the luggage rack, if there is one.
| Method | What it uses |
|---|---|
| 1 and 2 | The included quick-release straps, attached to the fixed points on the sides of the tail |
| 3 | The lid buckles threaded through non-elastic third-party straps, if you want to continue using your system |
The bag's color is a safety choice
The tail bag is the largest object a car sees of you when following you. On a loaded motorcycle, it is literally your rear surface.
Night and day are not the same problem
The reflective inserts are on all sides in every color, so black works at night. During the day, in rain or flat light, yellow or military green make you visible in a way black cannot. If you ride many miles on the highway or in winter, it is worth thinking twice before choosing black out of habit.
Three details make a difference from the second day
These are the features you do not notice in the store but appreciate halfway through a trip.
- Dry and wet separation compartment. Your soaked rain gear and clean clothes do not share the same space.
- Double side pockets for what you need without opening the main compartment.
- Detachable shoulder strap. Once off the bike, it becomes a duffel bag: carry it to your room in one motion.
The size increase costs less than a tankful
There are only nine euros between 40 and 66 liters: so when in doubt between two consecutive sizes, the larger one is almost always the better choice.
| Volume | Price | Available on 02/10/2026 | Sold out |
|---|---|---|---|
| 40 L | 54 € | Black, yellow, military green | Fluorescent green |
| 50 L | 58,50 € | Black | Yellow, military green, fluorescent green |
| 66 L | 63 € | Black, yellow, military green | Fluorescent green |
| 90 L | 72 € | Military green | Black, yellow, fluorescent green |
- Capacities
- 40, 50, 66, 90 L
- Material
- Technical PVC, high-frequency welded
- Protection
- IPX6
- Closure
- Patented magnetic roll-top
- Vent
- Front valve
- Visibility
- Reflectors on all sides
- Included
- Shoulder strap, 2 quick-release straps
- Colors
- Black, yellow, military green, fluorescent green
Frequently asked questions
How many liters should a motorcycle rear bag hold?
40 liters for a solo weekend without camping, 50 for a week in a hotel or a weekend for two, 66 for a week with a tent, 90 for long self-sufficient trips. A tent and sleeping bag alone justify moving up one size.
Is 50 or 66 liters better if I am undecided?
When in doubt between two adjacent capacities, the larger one is almost always the better choice: the price difference between 50 and 66 liters is €4.50, and the vent valve returns the bag to the size of the actual load when it is not full.
Does a half-empty 90-liter bag become bulky?
Not with this series: the front vent valve expels air after the roll-top is closed, the load compresses, and the bag adapts to the actual contents. However, the weight remains: 90 liters loaded to the top is a heavy, rearward load that lightens the front end on the highway.
Does IPX6 mean I can immerse the bag?
No. IPX6 indicates resistance to high-pressure water jets, meaning driving rain and splashes. Immersion requires an IPX7 rating.
Why do seamless welds matter?
Because every seam is a row of holes in the fabric and must be sealed with tapes that come unstuck over time. With high-frequency welding, the fabric is never pierced, so there are no infiltration points to maintain.
How do you close the roll-top correctly?
The edge must be rolled down for several complete turns and fastened with both buckles, as instructed by the manufacturer. With just one turn or only one buckle fastened, the stated load-bearing capacity is not guaranteed.
How do you secure a rear bag to a motorcycle?
With the included quick-release straps, attached to fixed points on the sides of the tail. The manual documents three procedures, one of which is compatible with non-elastic third-party straps. The mounting points must be kept away from the exhaust, and the excess webbing must be secured.
Do I need a luggage rack to install it?
No. It rests on the passenger seat or the luggage rack, if present, and only requires mounting points on the sides of the tail to which the straps can be attached.
What is included in the package?
In addition to the bag, a detachable shoulder strap and two LOBOO quick-release straps for attaching it to the motorcycle.
Does the color affect anything besides appearance?
Yes. Reflective inserts are present on all sides in every color, but during the day, in rain or flat light, yellow and military green increase visibility compared with black.
Can I use it as a duffel bag once I get off the motorcycle?
Yes. The included detachable shoulder strap turns it into a duffel bag that you can carry to your room in one trip.
How much does the LOBOO BWB rear bag cost?
On the Endurrad store, it costs 54 euros for the 40-liter version, 58.50 euros for the 50-liter version, 63 euros for the 66-liter version, and 72 euros for the 90-liter version (prices verified on October 2, 2026).
Are all sizes and colors available?
Not always. As of October 2, 2026, the 40- and 66-liter sizes are available in black, yellow, and military green, the 50-liter size in black, and the 90-liter size in military green; fluorescent green is sold out in all sizes. The product sheet is authoritative.
Read next
The right volume for your motorcycle and your trip
If you are unsure about the volume or the mounting points, send us your motorcycle's make, model, and year: we will help you before you order. You can also do this from the Endurrad App for iPhone, with the catalog and support in your pocket.
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