Ultegra CS-R8000

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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 s peed freehub bodies (use 1.85mm spacer for 11 speed road) Other sizes are compatible only with 11 speed road hubs Attributes Cassette Spider Mat. Aluminum Cassette Technology Hyperglide EV Cog Material Steel Finish Chrome Speed 11 Show more