This is the SRAM Rival WiFli Climber Kit. Designed to convert your road drivetrain to a WiFli drivetrain. Includes a Rear Derailleur Medium Cage, PG-1050 Cassette 10sp 11-32t and a PC1051 10sp Chain. The first 11-32 cassette on the road. Gears that are lower and higher than existing triple gear ratios with less redundancy and perfectly smooth gearing transitions. The wider range of gears provides efficiency for improved climbing and descending with unmatched efficiency. SRAM continues to innovate the chains that continue to win races around the world. The new PC 1051 10 speed PowerChain featuring the PowerLock connecting link provides smooth, precise shifting and weight savings.
WiFLi = Wider – Faster – Lighter. SRAM’s WiFLi Technology is based on the compact 2 × 10 – two front chainrings and 10 gears in the rear – design inherent in SRAMApex and Rival, which delivers a wider range of gears than your standard triple, faster shifts through two chainrings and 10 gears, and with significant weight savings. It’s the newest technology from the company that continues to innovate the cycling experience. Wider – a wider range of gears for every climb and any descent. Faster – two chainrings shift (and set-up) much faster and more easily than three. Lighter – as much as 274g (9.8%) less than the most popular road triple.