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From the manufacturer's official website:
Thanks to Ultra-Drive™ geometry which defines the forms and machining of the sprocket teeth and nickel-chrome finish, the Chorus™ sprocket set ensures fast precise shifting that remains constant over time.
Also available from this year, the 11-25 combination is ideal if combined with CT-type cranksets.
Ultra·Drive™ - nickel-chromed finish - light alloy carrier - supplied without lockring (except for 11-23 and 11-25)
Nominal weight: 220 g.
For more information, please visit this product's webpage.
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