shimano sm-crm70 slx m7000 30t single chainring

Dynamic chain engagement (dce) is used to hold the chain and help prevent chain jump out.
This is achieved by using a broader and taller tooth profile in conjunction with a special hooked leading edge and alternate profiled tooth shaping.
This provides superior chain retention, lower driving sound, increased durability and drag to a minimum.
Features:
Durable teeth using a plated steel construction supported by a composite carrier bodyDyna-sys11 hg-x11 11-speed chain compatibleAvailable in 30t/32t/34t