Mike
There was one cross-over year, the year before 7401 STI was introduced in 1990, where 8-speed was available with down-tube shifters as an 8-speed Uniglide based system in 1989 only. This used a Uniglide hub, where the smallest cog screwed onto the outer part of the hub, much like an old style freewheel construction.
Hyperglide has a full set off splined cogs (7 speed from 1989 onwards in the MTB groupsets, and 8 speed in road groupsets from 1990 onwards), and a lockring that threads into the inner part of the rear hub to secure them. I'm after an 8 speed HYPERGLIDE cassette - probably should have made this clearer in the OP, but rather assumed the chances of someone coming forward with 8 speed Uniglide was too remote to worry about!
Ideally, I want an 12-25 Dura Ace Hyperglide 8 speed cassette. These have a matt/brushed silver appearance. However, I'd also consider one of the brighter silver standard Hyperglide cassettes (from the lower groupsets), just to have a genuine Shimano cassette on the back for shifting purposes. Someone sold me a shitebox Sunrace cassette last year (claiming it was Shimano because it came with a Shimano lockring that didn't match the rest of the cassette!). It does a job, but the shifting isn't as it should be....
There was one cross-over year, the year before 7401 STI was introduced in 1990, where 8-speed was available with down-tube shifters as an 8-speed Uniglide based system in 1989 only. This used a Uniglide hub, where the smallest cog screwed onto the outer part of the hub, much like an old style freewheel construction.
Hyperglide has a full set off splined cogs (7 speed from 1989 onwards in the MTB groupsets, and 8 speed in road groupsets from 1990 onwards), and a lockring that threads into the inner part of the rear hub to secure them. I'm after an 8 speed HYPERGLIDE cassette - probably should have made this clearer in the OP, but rather assumed the chances of someone coming forward with 8 speed Uniglide was too remote to worry about!
Ideally, I want an 12-25 Dura Ace Hyperglide 8 speed cassette. These have a matt/brushed silver appearance. However, I'd also consider one of the brighter silver standard Hyperglide cassettes (from the lower groupsets), just to have a genuine Shimano cassette on the back for shifting purposes. Someone sold me a shitebox Sunrace cassette last year (claiming it was Shimano because it came with a Shimano lockring that didn't match the rest of the cassette!). It does a job, but the shifting isn't as it should be....
