If you need a different crank arm length options include 165mm, 170mm, 172.5mm, 175mm. Weight comes in at a quoted 799 grams for a 172.5 crank arm length, no bottom bracket, and a 42 tooth chainring. Forged aluminum is a good option to balance performance and price.
Whatever chainring you choose, SRAM Rival 1 cranksets use a forged aluminum construction. The array of 38T, 40T, 42T, 44T, 46T, 48T and 50T chainrings make plenty of gearing combinations available. With all that in mind, don't discount the utility of 1x drivetrains on the road.
When things get dusty, dirty, or muddy, there is a rounded slope to the edge of the tooth that helps make sure the chain continues to engage.
The tall, square, profile to the teeth, that SRAM calls X-SYNC, helps to engage the chain earlier than a traditional triangle tooth profile.
