The Shimano Dura Ace 8 Speed Cassette 12-23 Hyperglide is in good used condition cassette designed for road bikes. This set includes a cassette with 8 speeds, ranging from a 12-tooth smallest sprocket to a 23-tooth largest sprocket. The cassette in the original box are manufactured in Japan by the trusted brand Shimano. Ideal for road cyclists looking for precision and durability in their bike components, this cassette is compatible with Shimano road freehub systems. Please see my other listings for vintage bike parts.