One bullet, two words — and the 11-32 costs 74 cents more
SHIMANO HG51, 8-speed, 11–28T
A Shimano HG51 8-speed cassette in 11-28T, in chrome-plated steel with drilled cogs.
What you are getting
A Shimano HG51 cassette: 8-speed, 11-28T, silver. $24 — the cheapest cassette on this page.
And one bullet: “8-Speed.”
It is the thinnest listing in this survey
One bullet, two words. No weight, no cog list, no finish, no lock ring, no chain standard, no freehub body, no construction.
The description field does more work: “chrome-plated steel… exceptional corrosion resistance”, “the drilled cogs reduce weight”, “Alivio CS-HG51”, and the range as 11-28.
So the specification exists; it is simply not in the bullets. That pattern runs through this whole lot — the BR-CT91 brake shoes on the brake page have German bullets and an English description, and the R55C3 shoes have a Spanish one.
11-28 is the narrower HG51, and the difference is the bottom gear
The CS-HG51 11-32T on this page is the same model family at $25.26. This is 11-28T at $24.
Four teeth, seventy-four cents. The 11-32 gives a lower climbing gear across a 2.91× spread; this is 2.55× and stops at 28.
On a flat commute that is fine and the steps between sprockets are slightly tighter. On a hill with a single chainring it is the gear you will miss. For seventy-four cents, the 11-32 is almost certainly the better buy unless the derailleur cannot take a 32 — which is the thing to check, because an 8-speed road derailleur often cannot.
Drilled cogs, which is the same idea by another name
“The drilled cogs reduce weight without compromising strength.”
The CS-HG50 and CS-HG51 listings on this page call this “sprockets are cut away to further reduce weight without reducing rigidity”. Same technique, three wordings, one family.
No weight is given here, so there is nothing to compare — both 11-32 cassettes publish 300 g (10.6 oz).
Chrome-plated steel, which is the third plating named in this group
This description: chrome-plated steel. The CS-HG51 11-32 bullets: nickel-plated. The CS-HG50 bullets: nickel-plated. All three are the Alivio HG51/HG50 family.
Plated rather than bare is the useful part; which metal, the listings do not agree on.
What is not published
No weight, no cog-by-cog tooth list, no lock ring, no freehub body, no chain standard in the bullets — and effectively no bullets at all. The description names the group, the plating and the range, and that is the whole of it.
At $24 it is the cheapest cassette here, and the 11-32 version is seventy-four cents away.
Availability
Read on the day this page was built: $24 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.
