FIT: Shimano compatible cassette cog (Redline, Bombshell, Rhythm, SINZ, Excess, OEM and more)
CHAIN FIT: 3/32" recommended (1/8" can be used as well)
MATERIAL: Forged aluminum
J&R Helpful Hint: Cogs and sprockets wear over time. We recommend replacement every 6 months due to chain wear.