Unless you live at the top of a 30 minute climb, an 11-speed cassette with an 11-28 spread should be absolutely perfect for nearly every ride. The SRAM Red XG-1190 Cassette is compatible with the 11-speed SRAM RED eTap, RED, Force, Rival, and Apex, so it can be the elite workhorse no matter your groupset. Lower down the block, the tightly spaced cogs will make shifting silky smooth, while the slightly wider spaced cogs at the top will make certain you have enough room to spin up a 15% grade if need be. The first nine cogs are machined from a single block of high grade steel, making it stiffer, more durable, and lighter than using titanium. Thanks to the X-Glide technology, every shift happens smoothly and rapidly, no matter what pressure you are putting on the pedals. And the StealthRing elastometer between the cogs keeps shifting beautifully quiet thanks to its ability to dampen vibrations and reduce noise.-Stealth Rings between the cogs minimize chain noise-Hollow steel dome makes for the stiffest gear cluster ever at the lightest weight-11 speed cassettes with 11 tooth cogs have the smallest cog located behind the cassette in the packaging