The only one that names its alloy grade
CNC 6061 alloy cages, pair
A pair of 6061 aluminum bottle cages for bottles from 600 to 800 ml, each supplied with two screws.
What you are getting
Two cages in 6061 aluminum alloy, black, taking bottles of 600 to 800 ml (20.3 to 27 oz), with two screws per cage. $15.99 the pair — $8.00 a cage.
It names its alloy, which nothing else here does
“Made alloy-6061: it’s light and highly resilient, making it perfect for road or trail applications.”
6061 is the standard structural aluminum for bicycle parts: heat-treatable, weldable, with good spring once tempered. The FiveBox cage on this page says “aluminum alloy” and the PRO BIKE TOOL says “aluminum alloy with heat-treated strength” — only this one gives the grade.
For a cage the grade matters because the arms work as springs. An alloy that takes a temper holds its shape over years of bottles being pushed in; a soft one spreads and stops gripping.
Two screws per cage, which is the right count
“Comes with 2 screws per bottle cage that will give it a firm hold against the threaded holes on your bike’s frame.”
Four screws for two cages. The FiveBox pair on this page includes two screws for two cages, which covers one bolt each — so this is the pair that arrives complete.
A small thing, and the kind that stops a job on a Sunday.
The bottle range is given in volume, which is the less useful unit
600, 650, 750 and 800 ml — 20.3, 24, 25 and 27 oz.
Four named sizes, and they will cover most cycling bottles. What the listing does not give is a diameter, and the FiveBox cage on this page is explicit that diameter is what decides: a tall 750 ml bottle and a squat one of the same volume are different widths.
So a bottle outside the four named volumes cannot be checked against this cage.
“Less likely to scratch the finish on most water bottles”
A hedged claim, and an honest one for an alloy cage. Bare alloy arms do mark a plastic bottle over time; the ROCKBROS polycarbonate cage on this page claims a finish that “doesn’t scratch or mark the bottle”, which a plastic cage can more reasonably say.
Nothing on this listing says whether the alloy is anodized, painted or raw, and that is what decides it.
And no weight, which three cages here do publish
ROCKBROS 30 or 35 g (1.2 oz), ThinkTop about 25 g (0.9 oz), PRO BIKE TOOL 48 g (1.7 oz). This says “it’s light” and gives no figure.
A 6061 cage is likely to land near the PRO BIKE TOOL’s 48 g (1.7 oz), but likely is not published.
Top entry, as all five are
The introduction to this shelf is built around side-entry cages for small frames, and none of the five cages in this survey is one. Measure the gap between the bottle boss and the top tube before buying any of them.
What is not published
No weight, no bottle diameter, no bolt spacing, no finish or anodizing, no cage dimensions. Five bullets, three of which are about holding the bottle firmly and one about installation.
At $8.00 a cage it sits between the FiveBox pair at $5.00 each and the PRO BIKE TOOL at $8.99 for one — and the named alloy grade is what it has that they do not.
Availability
Read on the day this page was built: $16 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 2026-10-06. The live price is at the top of the page.
