The NX Eagle PG-1230 cassette gives riders every bit of the climbing range that the Eagle ecosystem affords with a simple upgrade to splined-drive body wheels. Designed to be durable enough to withstand the increased demands of E-MTB applications and a perfect solution to heavy-duty use and abuse.-Eagle technology 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-The PG-1230 Eagle cassette meets durability requirements for E-MTB applications-Wide 11-50t gear range – Compatible with a Shimano splined driver body-Designed to be used with Eagle 12-speed chains