MOSISO Rack Trunk Bag Review
The MOSISO is a compact, well-pocketed trunk bag that doubles as a shoulder bag off the bike. Its zips draw the complaints.
The verdictA compact, pocketed trunk bag that carries well off the bike. Watch the zips and bring a cover for real rain.
The listing gives the bag as 12 litres and 15.1 x 6.39 x 6.39 inches, about 38.4 x 16.2 x 16.2 cm, in polyester that it calls waterproof. Inside there are six small pockets plus side pockets, so tools, snacks and a phone stay sorted rather than piling in one corner. No weight is published.
It fixes to the rack with four hook-and-loop straps. Amazon's review summary counts most attachment mentions as positive, though one owner had to wrap the straps round the sides because fastening underneath was awkward. A top handle and a shoulder strap of 92 to 151 cm make it easy to carry off the bike.
The zips are the weak point in the owner record. Amazon's summary counts 37 negative mentions of zip quality against 26 positive, with owners describing side zips that broke and a zip that failed quickly. No rain cover is listed, and the single reflective strip sits low on the back.
Owners on Amazon US gave it 4.6 stars from 1,957 ratings in October, across 14 colours, with 4 percent at one or two stars. This link opens the light blue colour, and black is a separate option on the listing. At $35.99 in August it suits a commuter or a day rider who wants pockets and a strap.
What works
- Six small pockets plus side pockets
- Shoulder strap and top handle
- 4.6 stars from nearly 2,000 owners
What doesn't
- Zip complaints in owner reports
- No rain cover listed
- One small reflective strip
Buy it if
Commuters and day riders who want a pocketed trunk bag they can carry off the bike on a shoulder strap
Skip it if
You ride in sustained rain without a cover, or need zips that will last heavy use
Others we scored in this category
One email when something changes
We re-check prices and picks quarterly. When a recommendation changes — or a product we rated well turns out not to last — you hear about it. No weekly digest, no gear-of-the-day.
By subscribing you agree we can email you when a recommendation changes. That is the only thing we use your address for. Unsubscribe in one click; we don't sell or share the list — see our privacy policy.