The XT M8000 Single Chainring is a new 4-arm narrow-wide chainring from Shimano with hollow gear construction. It has been extremely well thought through & features the same hooked teeth as the XTR, deeper teeth with DCE (dynamic chain engagement) to increase chain retention by 150 percent & prevents the chain from jumping out. This all helps hold the chain firmly on uneven tracks while keeping chain noise & drag to a minimum & increases durability. The hollow gear construction optimises rigidity, durability & ensures minimal weight. The teeth are made more durable with the use of a plated steel construction supported by a carbon composite (CFRP) carrier body. Available in 30, 32 or 34t in Black only.