Five dollars more than its identical twin, and a lock ring in the description
SHIMANO CS-HG50, 8-speed, 11–32T, 300 g (10.6 oz)
A Shimano CS-HG50 8-speed cassette in 11-32T at 300 g (10.6 oz), with a corrosion-resistant steel lock ring named in its description.
What you are getting
A Shimano CS-HG50 cassette: 8-speed, 11-32T, 300 g (10.6 oz), nickel-plated Hyperglide sprockets, silver. $30.50.
It is the dearer of two identical listings
The CS-HG51 on this page carries the same five bullets, word for word, the same 8 speeds, the same 11-32T range and the same 300 g (10.6 oz) — at $25.26.
Five dollars and twenty-four cents, and a different model number. That is the whole published difference.
What this listing adds, in its description rather than its bullets, is two lines the other does not have:
- “Corrosion-resistant steel cassette lockring”
- “For narrow 8-speed HG chains”
So the lock ring is named here and not there, and the chain standard is stated here and not there. Whether that is worth $5.24 is a judgment, but it is at least a difference you can point at.
The cog list is not on this listing
The title says 11-32T and the bullets never break it down. The CS-HG51 on this page publishes 11-13-15-18-21-24-28-32, and Shimano’s 8-speed 11-32 has used that progression for years — so the gearing is almost certainly identical.
“Almost certainly” is the problem. Four cassettes on this page list their teeth cog by cog; this one and the 12-speed 105 do not.
What Hyperglide and the cut-away sprockets actually do
“Hyper glide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load.”
Shift gates are the ramps and shaped teeth that let the chain climb between sprockets while you are pedalling hard, rather than waiting for a slack moment. On an 8-speed cassette with two- to four-tooth gaps, that is doing real work.
“Sprockets are cut away to further reduce weight without reducing rigidity” — material removed from the body of each ring where the chain never touches. It is how 300 g (10.6 oz) is achieved with eight individually splined steel sprockets, against the 285 g (10.1 oz) the spider-built XT manages with ten.
Nickel plating, and the usual contradiction
The bullets say nickel-plated. The description on the CS-HG51 listing says chrome-plated steel gears for what appears to be the same part. Two platings named across two listings for one family.
Either way, plated rather than bare — which on a bike left outside is the difference between a cassette that wears and one that rusts.
Close ratio, on a cassette that is not
“Close ratio gearing allows a more efficient use of energy through finer cadence control.”
That bullet is inherited from Shimano’s road cassettes and it does not describe this one. An 11-32 in eight steps has gaps of two, three and four teeth; the CS-HG500-10 on this page, at 12-28 in ten steps, has five single-tooth steps and is the genuinely close-ratio cassette in this survey.
The phrase appears on both 11-32 listings, because they share the same five bullets.
What is not published
No cog-by-cog tooth list, no freehub body, no ratio spread, and no reason to prefer it to the CS-HG51 beyond the two lines its description adds.
Availability
Read on the day this page was built: $31 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.
