The Shimano Deore XT SM-CRM85 chainring is designed for use with Shimano's M8100 and M8130 1x cranksets.
XT configuration, the arms are the same, but the direct mount chainring is slightly different – it uses aluminum arms and steel teeth, versus the XTR chainring's full-aluminum construction. That adds a little weight, but it also means that an XT chainring is roughly half the price of an XTR ring
