The GX crankset is engineered for complete chain control with each tooth precisely designed to work seamlessly with the chain’s inner and outer links The GX Eagle rear derailleur has updated cage architecture that improves chain management, and is compatible with both 1052t and 10-50t cassettes The XG1275 10-52t cassette offers expanded 520% gear range, and features SRAM's Full Pin technology, making it both lightweight and durable (Fits SRAM XD Driver body only) The trigger shifter puts total control of your gear selection into the thumb of one hand GX Eagle chain for smooth and efficient shifting DUB bottom bracket sold separately 52.0mm chainline for 141/148 Boost Hubs