SRAM PG-970 12-23 9 Speed Cassette Size:12-23 2 3/8" drive bits and

2 3/8" drive bits and sockets are made from tough

About Shimano TZ500 14-34 7 Speed Multiple Freewheel CassetteThe SHIMANO TOURNEY TZ 7-speed freewheel features a MEGARANGE 14-28T range

sort out minor mechanicals

The fit system is made of a durable flexible material for long term performance and daily lockability

more flexible and effective against cuts than a comparable nylon breaker

SRAM PG-970 12-23 9 Speed Cassette Size:12-23 2 3/8" drive bits andAbout SRAM PG 970 12 23 9 Speed Cassette Cassette technology optimized for MTB. More reliable. More durable. Better performing, thanks to an optimal tooth profile and shift ramp design for quick and positive index shifting. Go climb a mountain. Features SRAM's cassette performance is optimized by material choice, tooth profile and shift ramp design for quick and positive index shifting Narrow ratio cassette for the downhill fanatics in the crowd Steel