Shimano Ultegra CS 6700 10 Speed Cassette. The Shimano Ultegra 6700 10 Speed Cassette is a tried and true standard for 10 speed drivetrains. Striking a perfect balance between durability and light weight, you'll be assured of many, many miles of flawless shifting performance no matter if it's for road or cyclocross bikes. Shimano has machined the cogs to provide precision shifting under load while the nickel plated steel cogs themselves are super strong. Additionally, it's perfectly fine for either Shimano or SRAM 10 speed set ups.