#2 best seller, SRAM PG1070 cassette

The SRAM PG1070 cassette is exactly what I needed to create a climbing machine out of my road bike. Shifts are crisp and quiet and no hassles at all to install. Unlike Shimano, you do not need the first little spacer on the wheel.

This Cassette was added to a full Ultegra system utilizing the medium cage derailleur to create a SRAM Apex style congfiguration using Shimano Components

Now it is ranked #2 best seller in amazon.com and is rated 5 start by users.