CASSETTE SPROCKET, CS-R800011-30T, ULTEGRA, 11-SPD, 11-12-13-14-15-17-19-21-24-27-30T

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• 5 largest cogs on alloy and composite spiders
• Light weight and high performance
• Aluminum lockring
• Nickel plated finish
• The 11-34 cassette (120615-07) is compatible with 10 and 11 speed freehub bodies (use 1.85mm spacer for 11 speed road)
• Other sizes are compatible only with 11 speed road hubs