SRAM XX1 Eagle 10-50 Cassette Gold Rapilock The 4th generation model is

The 4th generation model is more slippery and beautiful than ever

Lube ideal for riding in dry conditions

Heat and Altitude Acclimation- See how your body is holding up with heat and altitude acclimation

this light is ready to accompany you on any adventure

including an altimeter for elevation data

SRAM XX1 Eagle 10-50 Cassette Gold Rapilock The 4th generation model isthis 12 speed, 10 to 50 tooth cassette offers an optimal 500 percent gear range at a considerably lighter weight than 2x systems. It carries with it the X DOME architecture, which, independent tests have concluded, yields the strongest cassettes on the market. New shifting characteristics improve both, inboard and outboard shifting, as well as chain retention.