SRAM Apex front derailleur

WiFLi™ SRAM® Apex dual chainrings are simpler, lighter, faster and simply better in every way than triple chainrings. With a larger gear range for easier climbs and faster descents, who needs three chainrings? WiFLi™ stands for... * Wider – a wider range of gear ratios for every climb and descent * Faster - with two chainrings, shifting (and adjustment) is quicker and easier than with three * Lighter – up to 274 g (9.8%) lighter than the most commonly used triple model triple Zero Loss stands for Zero Loss stands for “zero loss”. When you operate the gear lever to shift up or down a gear, the cable is released immediately, ensuring zero loss of motion. There is no more idle time waiting for the gear to click into place. The gear is changed immediately and precisely.