Magnets, straps or a ring — and what your tank is made of · review
MOSISO MO-Motorcycle-Tail-Bag-BK review
A 10-litre tail bag measuring 32 × 26 × 18 cm in waterproof polyester, held by four buckles and two rear-seat straps, with a non-slip base and an adjustable shoulder strap.
The bottom line A 10-litre tail bag with published dimensions, a non-slip base and a shoulder strap. The title calls it a tank bag; its own bullets do not.
What it actually is
A tail bag for the rear seat. The maker’s bullets describe rear-seat straps and a non-slip base; the product title uses the words tail bag and tank bag both. This page follows the bullets.
What the seller commits to paper
10 litres in one main compartment at 32 × 26 × 18 cm, in waterproof polyester stated against rain, water, mud and dust. Four buckles with two rear-seat straps and a non-slip base. An adjustable shoulder strap from 28.35 to 50.39 inches.
The two details worth having
The non-slip base, because a bag that creeps loosens its own straps over a day. And the shoulder strap, because luggage that cannot be carried indoors gets left on the bike.
The rows this seller leaves empty
Any waterproofing figure. The polyester is called waterproof; nothing measures it.
Availability
Around 37 € on the German Amazon store, in the single reading behind this page.
What Keepa returned in the single reading behind this page. Availability and prices move without notice.
Prices quoted in this text were read on 18 September 2026. The live price is at the top of the page.
The declared figures, and the blanks beside them
Strengths
Dimensions and capacity both published
A non-slip base is the detail that stops a strapped bag walking across a seat
Carries off the bike on a shoulder strap
Compromises
It is a tail bag — the maker’s own bullets say so, while the title also says tank bag
Listed on the German market only at the time of collection
Specifications
What it is
The maker names it a tail bag and saddlebag; the title also uses the word tank bag (from the title and bullets)
Capacity
10 litres in one main compartment (maker’s bullet)
Dimensions
32 × 26 × 18 cm (maker’s bullet)
Material
Waterproof, hard-wearing polyester, stated against rain, water, mud and dust (maker’s bullet)
Fixing
4 durable buckles with 2 rear-seat straps, and a non-slip base (maker’s bullet)
Shoulder strap
Adjustable from 28.35 to 50.39 inches (maker’s bullet)
Amazon reference
B0BC3Z29VB (one reference across 1 Amazon marketplace)
What riders ask about this one
Tank bag or tail bag?
The maker’s bullets describe a tail bag for the rear seat, with rear-seat straps and a non-slip base. The title uses both words. This page reports both and follows the bullets.
Why does a non-slip base matter?
A strapped bag on a slippery seat creeps under braking and acceleration until the straps are loose. A grippy base is what keeps a four-buckle fixing tight over a day.
Who this one is for
A day’s gear strapped to a pillion seat and carried indoors on arrival.
Compared with its closest rivals
Same category, nearest prices. Only the specifications every one of them states are shown — a half-empty column compares nothing.
Model
Price
Material
Amazon reference
MOSISO MO-Motorcycle-Tail-Bag-BK
37 €
Waterproof, hard-wearing polyester, stated against rain, water, mud and dust (maker’s bullet)
B0BC3Z29VB (one reference across 1 Amazon marketplace)
Magnetic · steel tanks only · clear phone window · strap as second fixing · rain cover
A magnetic Oxford tank bag with a clear top window for a phone or navigator, a securing strap as a second fixing and an internal rain cover — for steel tanks only, as the maker states.
Best for: A steel-tanked machine where a navigator needs to sit in the rider’s eyeline.
Rear bag, not a tank bag · 26 × 18 × 59 cm, 1050 g at 20 L · modular · removable waterproof liner
A 20-litre modular rear bag — the maker describes it as a pannier, saddlebag and tail bag — measuring 26 × 18 × 59 cm at 1050 g, with a removable waterproof inner bag.
Best for: Carrying luggage on a rack or over a pillion seat, in a bag that can be split up.
7 magnets · steel tanks only · 19.5 × 11.5 × 2.7 cm · touchscreen window · cable ports
A flat magnetic tank pouch held by seven magnets and an 11 cm safety line, measuring 19.5 × 11.5 × 2.7 cm, with a touchscreen-compatible window and cable openings.
Best for: A phone or a navigator in the rider’s eyeline on a steel tank, and nothing else.