The sram x01 dh xg 795 7 speed cassette is an incredibly light weight cassette that has been designed to deliver optimal performance on the downhill with larger jumps between gears the sram x01 dh xg 795 cassette eliminates the requirement for doubletriple shifts to get in the correct gear additionally thanks to the smaller amount of cogs you will find that going from starting gear to the higher gears incredibly quick halving how many shifts are needed when compared to a standard 10 sp