Shimano XTR Single Chainring - 38T

The Shimano SM-CRM95 is a high-performance single chainring designed for XTR M9100 and M9120 mount...

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Merlin CyclesShimano Dark Grey Xtr M9100/M9120 Single Chainring - 12 Speed - / 38 / Direct Mount / 12 Speed
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Product Information

Full details

The Shimano XTR SM-CRM95 38T chainring is a premium component engineered for dedicated mountain bikers using XTR M9100 and M9120 cranksets who prioritize drivetrain efficiency and chain security. By utilizing proprietary Dynamic Chain Engagement (DCE) technology, it offers exceptional retention on rough trails, though it is specifically optimized for 12-speed systems and requires a direct-mount interface compatible only with specific Shimano crank architectures.

All features

Model Part NumberSMCRM95A8
BrandShimano

Extended Product Information

FAQs

Is this chainring compatible with 11-speed drivetrains?

No, the SM-CRM95 is specifically engineered for Shimano 12-speed chains and drivetrains.

Can I use this on a non-Shimano crankset?

No, this chainring uses a proprietary direct-mount interface designed exclusively for Shimano XTR M9100 and M9120 cranksets.

What is the purpose of the hooked tooth profile?

The hooked leading edge helps lock the chain in place during heavy vibrations, preventing chain jump.

How often should I replace the chainring?

Replacement intervals depend on mileage and conditions, but look for signs of 'shark-finning' or accelerated wear on the teeth.

Does this ring require a specific chain type?

It is highly recommended to use a Shimano 12-speed Hyperglide+ chain for the best compatibility and performance.

Troubleshooting

Increased drivetrain noise

Check the chain for wear (stretch) and ensure the chainring teeth are free of built-up grit or debris.

Difficulty installing the lockring

Ensure the chainring is perfectly aligned on the crank spline before tightening; do not force the lockring if it feels cross-threaded.

Pros and Cons

Pros

  • Superior chain retention on rough terrain
  • Optimized for high-performance 12-speed drivetrains
  • Lightweight hollow gear construction
  • Seamless integration with XTR M9100/M9120 cranksets
  • Reduced drivetrain noise

Cons

  • Compatible only with specific Shimano direct-mount cranksets
  • Not backward compatible with older 10 or 11-speed systems
  • 38T size may be too large for steep climbing on some setups

Setup, Compatibility & Care

This chainring utilizes a direct-mount system specifically for the XTR M9100 and M9120 series cranksets. Ensure you have the correct Shimano lockring tool for installation. Before mounting, clean the crank interface to ensure no grit is trapped between the ring and the crank arm. When installing, apply a light coat of grease to the threads of the lockring to prevent seizing. To maintain performance, clean the chainring periodically with a soft brush and a degreaser to remove mud and trail debris that can accelerate tooth wear over time.

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