Shimano Deore XT SM-CRM85 FC-M8100-1 MTB chainring

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Shimano Deore XT SM-CRM85 FC-M8100-1 MTB chainring

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The new Shimano XT SM-CRM85 chainrings with direct mounting system for XT FC-M8100-1, FC-M8120-1 and FC-M8130-1 1x12-speed cranks.


Shimano XT SM-CRM85 Chainring for FC-M8100-1/8120-1/8130-1

The original mountain bike group continues its legacy: the XT SM-CRM85 Chainrings from Shimano

In addition to a new special 12-speed chain (CN-M8100) with the corresponding new 12-speed QUICK LINK lock, SHIMANO is also equipping the XT M8100 with new cranksets for 12-speed (FC-M8100/8120/8130-1). Most of them use 1-speed systems and a wide range of chainrings (28T to 36T) is available.

The new XT 1x12-speed cranks are characterised by DYNAMIC CHAIN ENGAGEMENT+ technology, whose special high-precision tooth profile ensures that the chain finds optimum grip on the upper part of the chainring on rough terrain, but detaches equally well from the chainring at the bottom, thus ensuring efficiency, smoothness and low noise of the drive. The cranks are equipped with a direct-mount system for quick and safe assembly of the chainrings, enabling chainrings to be changed in no time at all. The crank is available in boost and non-boost specifications.

The original mountain bike group continues its legacy of remaining the standard for mountain bikers everywhere. Nearly three decades in, the DEORE XT brand is defined by its trail-tested durability, reliability and performance. Recognizing that today’s mountain bikers are riding faster and confidently on more technical terrain, the legacy of DEORE XT is more important than ever. In 2019, our pinnacle mountain bike technologies will trickle down to SHIMANO DEORE XT M8100.

Features - Shimano XT SM-CRM85 Chainring for FC-M8100-1/8120-1/8130-1

  • New tooth profile with Dynamic Chain Engagement+
  • Better chain engagement for greater chain retention
  • Special gear teeth profile designed for MTB riding usage
  • Smoother driving even over bumpy terrain
  • 1x with proprietary chain retention technology
  • Direct mount (Lighter and stiffer design & easy exchangeable chainring by direct mount and one key release)

Product features

  • Use: MTB
  • Group: XT M8100
  • Model: SM-CRM85
  • Compatible chain: CN-M8100 12-speed
  • Gear arms: 4-arm
  • Mounting system: Direct mount


  • FC-M8100-1
  • FC-M8120-1
  • FC-M8130-1

Gradation (choose variant)

  • 28T
  • 30T
  • 32T
  • 34T
  • 36T


  • Aluminium


  • approx. 115g (32T)


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