New-Old-Stock (NOS) Shimano Dura-Ace 8-Speed UniGlide (UG) Cassette - 12x19 (Silver Finish) Thank you for your interest in this item and please visit our store for other offerings. This offering is for a new-old-stock (NOS) Shimano Dura-Ace 8-speed cassette in a silver finish. It's the old UniGlide "twisted-tooth" design that includes a 12-13-14-15-16-17-18-19 cluster.The date code stamped on the first sprocket indicates a late 80's production date, which we believe was around the time Shimano rolled-out the HyperGlide technology on its high-end component groups (although we noted as late as 1992 where both the UniGlide and HyperGlide technologies were offered/marketed concurrently in Shimano reference/promotional materials from this period). This cassette is index (or as Shimano used to call it, "SIS") shifting capable, but as mentioned above, this is a UniGlide cassette, so it's only compatible with a UniGlide splined hub. Additionally, because all of the sprockets are loose or "singles", they are individually replaceable.
In fact, one of the benefits to the uniform design of each UniGlide sprocket (w/o a built-in spacer) is that once a sprocket is worn out, it may be reversed or "flipped over" on the freehub and used as if new... Giving you twice the useful life on each individual sprocket. This cassette design also allows for flexibility in changing sprocket sizes to create a rear cluster that better suits individual needs (assuming of course, the availability of additional UniGlide sprockets). We have also been told, although we do not have a lot of personal experience to back this up, that because of the more generic design of the UniGlide sprockets (as compared to Shimano's newer HyperGlide design), the UniGlide teeth are somewhat more compatible with other drivetrains, and are not limited solely to Shimano UniGlide drivetrains. Finally, I want to confirm the few units we have left in stock are new and unused and retail boxed...
I should also mention all our remaining stocks are still sealed in their retail box with Shimano branded factory tape. This also means the cassettes are still protected by the original plastic (bag) packaging within the retail box and these units have not been handled over their many years of storage time. I bring this up, because it's been our experience that these units (that are still sealed in retail packaging) are among the nicest cosmetically we have available. In particular, the silver finish on the sprockets still shows really well. Now I realize once installed, this factory new cosmetic finish may not matter as much to some folks, but I still want to point out the difference between our Shimano Dura-Ace UniGlide cassettes in sealed retail packaging vs.Those that are no longer sealed in their retail packaging. Again, the differences are cosmetic only, but these sealed units do show a little better. Shimano designed/manufactured their Dura-Ace Uniglide cassette/freehub systems to different specifications relative to their other UniGlide systems. The splined cogs and spacers (and the related splined section of a UniGlide hub body) are similar for all Shimano UniGlide models, but the smallest UniGlide sprocket that threads onto the end of a UniGlide hub body is spec'd to different standards. More specifically, Shimano made their Dura-Ace threaded sprockets (and the threaded section of their Dura-Ace hub bodies that accomodate them) with a smaller diameter relative to their other UniGlide systems. We measure Shimano UniGlide threaded cogs (with the exception of Dura-Ace models) to be about 33.5 mm in diameter and they will thread fine on just about any non Dura-Ace UniGlide freehub. However, Shimano's Dura-Ace threaded UniGlide cogs were spec'd to a smaller standard... With only a 31.0 mm diameter... And are only compatible with Dura-Ace UniGlide freehubs with the smaller (in diameter) threaded hub body section. Please keep in mind this is only an issue with threaded UniGlide sprockets, as all splined UniGlide sprockets and spacers are interchangable on just about any UniGlide freehub... This particular offering includes the smaller Dura-Ace UniGlide sprocket, with a threaded inside diameter of 31.0 mm.
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Unfortunately, this service is more expensive, especially for smaller/lighter packages, relative to the First Class International service. This item is in the category "Sporting Goods\Cycling\Bicycle Components & Parts\Cassettes, Freewheels & Cogs". The seller is "bicyclists_retreat" and is located in this country: US. This item can be shipped worldwide.