One speed (up front) is all you need.
With so many different standards, it can be difficult to set up your bike just how you want it and still have all the components work together. The SRAM GX group provides just about every possible option for your drivetrain, so you can lay it out exactly how you want, and you’ll be sure that everything will work together perfectly. The GX 1400 1x BB30 Crankset is SRAM’s most modern aluminum 1x crankset. The SRAM GX 1x BB30 Crankset works with a single up front and will only mount to a BB30 bottom bracket.
The GX crankset comes in several versions, including the value-oriented 1000 and the mid-range 1200, but the 1400 is the best there is. It's lighter than the others, thanks to hollow-forged crank arms, but it doesn't lose any stiffness to its solid-armed sisters. Mated to a forged aluminum spider, in fact, the GX is stiffer than most cranks on the market, even far more expensive competitors.
The SRAM GX 1x chainring uses X-SYNC technology. Each tooth’s thickness is CNC machined to work seamlessly with the chain’s inner and outer links to hold the chain in place in any terrain. With X-SYNC you never need a front derailleur, tensioner, or chain keeper to maintain perfect control over your chain.