Sram XX1 Eagle 12 Speed Drivetrain with cassette, shifter, derailleur, BB30 175mm Crankset with 32t chainring and chain in Gold. This kit has 5 parts to make it simple to upgrade your drivetrain to the new 1×12 Sram Eagle system : ) Whether you are dropping your front derailleur system or going from a 1×11 to 1×12, this new group will give you a huge gear range while keeping the simplicity of the 1x system. It shifts crips and looks as good as it works. SRAM XG-1299 Eagle 10-50 12 Speed Cassette Gold Brand new 12 speed cassette in Gold! Maximum strength-to-weight ratio is achieved with X-Dome machined 10-cog structure. 10-50 spread equals or exceeds range of heavier 2x drive trains. Fits the same XD drivers that are used for SRAM 10-42 11 speed cassettes Largest cog is aluminum Tooth profiles provide better up and down shifting and improve chain retention Titanium Nitride surface treatment reduces friction and enhances wear Cassette Body Type: SRAM XD 11/12 Speed Cassette Cogs: 10-12-14-16-18-21-24-28-32-36-42-50 Drivetrain Speeds: 12 Range: 10-50 Weight: 352 g The chain is the heart of the Eagle drive train, completely re-engineered for 1x systems and the innovative X-Sync 2 chainrings. It offers longer wear with less friction and less noise than previous SRAM chains. Flowlink design eliminates square edges on outer plates to reduced friction and wearRecessed chain rivet contact area allows ultr-high joining strength with zero pin protrusion PowerLock non-reusable connecting link is includedTitanium Nitride surface treatment reduces friction and enhances wear Item SpecificationsColorGoldWeight260gLinks118Defined ColorGoldLinks126 SRAM XX1 Eagle X-Actuation 12sp rear derail, gold/carbon X-Horizon parallelogram minimizes chain slap and is maintains constant gap with the 10-50 Eagle cassette. 12 speed Color: Gold/Carbon X-Actuation ratio specifically engineered for SRAM’s 1×12-speed Eagle drivetrain X-Horizon design aligns the