The Shimano Deore XT SM-CRM85 4-arm plate secures the chain safely even on rough terrain while ensuring an efficient, smooth and quiet drive system thanks to its Dynamic Chain + Tooth Coupling profile. Its direct mounting system enables quick sprocket installation. 

 Compatible with the Shimano Deore XT FC-M8100-1, FC-M8120-1 and FC-M8130-1 Speed Cranks. 
 Shimano Dynamic Chain Engagement + 
 Dynamic Chain Hitch + is a special gear tooth profile designed for use in 1-speed slide configurations for XC, Enduro and Trail Riding. Gives more chain retention and smoother pedaling - even on uneven terrain. Retaining the chain of any gear will reduce abrasion and wear.