The top-of-the-range Shimano Dura-Ace R9200 12-Speed Cassette uses titanium to make the five largest sprockets and mates these to carbon and aluminium carriers to result in increased rigidity and lower weight. The remaining seven smaller sprockets are made from steel and are extensively chamfered and drilled to reduce their mass without sacrificing strength.
The 12 sprockets result in more gear ratios with less spacing between them, allowing the rider to easily find their ideal cadence, while the Hyperglide+ tooth profiles combine with contoured shift gates to markedly increase shifting speed and smoothness, even under peak load. To complete the design, the sprockets are finished with nickel-plating to enhance durability.
It’s a Dura-Ace cassette. Works no different to an Ultegra version (or 105 for that matter), you just pay for less mass. In fairness, it does make up the bulk of the weight saving between the Ultegra group set and full Dura-Ace, so a logical but expensive choice.
You just can't beat Shimano for qaulity especially Dura Ace. lightweight. shanges amazingly well and a decent price from Sigma Sports
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From a single Osaka workshop in 1921, Shimano has grown into the world's most influential component maker. The brand's relentless engineering — Dura-Ace, Ultegra, GRX, XTR — has shaped the way the world shifts, brakes and rides, on the road and off it.
Shimano's flagship groupset, Dura-Ace, has been the benchmark for top-level road components for more than five decades. Every refinement that lands on Dura-Ace eventually shapes the entire Shimano range, all the way down to entry-level drivetrains.
