Do it once and do it right.
In the early days of mountain biking, everyone ran a triple up front. Singlespeeds became pretty common in the late nineties, but it wasn’t until recently that geared bikes with one or two front rings became the norm. The SRAM GX group provides several options for each layout. The GX1 1400 GXP Crankset is SRAM’s most modern aluminum 1x crankset. The SRAM GX1 GXP Crankset works with a single up front and will only mount to a Truvativ GXP 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.