This offering is for a new-old-stock Shimano CS HG-90 cassette (8-speed) with 13-14-15-16-17-19-21-23 gearing. This is an older cassette unit...mid 90's vintage to be exact, but it is HyperGlide compatible, as the shift ramps, etc. that are characteristic of HyperGlide cassettes are easily identifiable on this unit. It is also a higher-end unit, as the HG-90 cassettes were typically compatible with (and considered equivalents to) Shimano 600/Ultegra or Deore XT drivetrain components. Although, this cassette will probably mount on just about any Shimano 8/9/10-speed HyperGlide freehub with few exceptions.

Having said the above, we measured the "stack height" (for lack of a better term) of this cassette and noted it to be about 38 mm (using our digital calipers). We thought this additional measurement would help ensure compatibility, should you want to measure the width of the intended splined freehub body and compare it to our measurement. One final comment on compatibility...please note the HyperGlide cassette design includes a separate threaded lockring that threads into the underside/inside of a freehub body (and this is Shimano's preferred freehub design since the early 90's). As a result, most Shimano freehubs on today's market will be HyperGlide compatible, but please be mindful of Shimano's older freehub bodies with visible external threading at the end of the freehub body, as this older design is generally not compatible with one of these HyperGlide cassettes.

As for condition, this cassette unit is new and unused, but we had to discard the box (as it was heavily shopworn to the point where it was falling apart).