Ride anywhere with the wide-range PG-1230, 11 to 50-tooth Eaglecassette. The NX cassette gives riders every bit of the climbing range that the Eagleecosystem affords with a simple upgrade to splined-drive body wheels. The PG-1230 is the only Eaglecassette designed to be durable enough to withstand the increased demands of E-MTB applications and a perfect solution to heavy-duty use and abuse.Things To Remember:Eagletechnology provides an expanded, optimum, gear range making you fast on the flats, giving you control on the climbs and unleashing your speed on the descents.Eagleis a complete drivetrain system that was developed to be an integrated high-performance ecosystem. The engineering and testing that went into the development provide for maximum performance, safety, and long-term durability to ensure a great consumer ride experience. We guarantee this performance when Eagledrivetrains are used as a complete ecosystem. For additional information, please contact your SRAM