Shimano Deore XT FC-M8000 Chainring - 38T-BD
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Product Information
Full details
The Shimano Deore XT FC-M8000 38T outer chainring is designed for mountain bikers using an 11-speed double drivetrain who demand precision shifting and long-term durability. It serves as an ideal replacement part for worn rings, offering professional-grade performance on technical trails; however, it is strictly compatible with the specific 96mm bolt circle diameter (PCD) of the M8000 4-arm crankset and will not fit older or standard 104mm BCD spiders.
All features
| Model Part Number | Y1RL98090 |
|---|---|
| Brand | Shimano |
Extended Product Information
FAQs
Will this fit an M780 crankset?
No, this chainring is designed specifically for the 96mm BCD of the M8000 series and will not fit the 104mm BCD found on older M780 models.
Does this ring come with mounting bolts?
No, mounting bolts are typically sold separately or reused from your existing crankset.
Can I use this for a 1x setup?
This chainring is designed for double cranksets and lacks the narrow-wide tooth profile required for a reliable 1x drivetrain setup.
What is the BCD of this chainring?
This chainring has a 96mm bolt circle diameter (PCD).
How do I know when it is time to replace the chainring?
Look for teeth that appear 'hooked' or pointed, or if the chain begins to skip under load despite proper derailleur adjustment.
Troubleshooting
Chain drops during upshifts
Check your front derailleur limit screw settings and ensure the chainring alignment mark is perfectly aligned with the crank arm.
Poor shifting performance
Inspect for bent teeth or excessive chain wear and verify that the chain is compatible with 11-speed systems.
Pros and Cons
Pros
- Genuine Shimano original equipment quality
- Optimized for smooth, rapid shifts under load
- High strength-to-weight ratio
- Specifically tuned for 11-speed drivetrains
Cons
- Not backward compatible with 104 BCD cranksets
- Requires specific tool for lockring/bolt removal
- Limited to 38-28T double chainring configurations
Setup, Compatibility & Care
Installation requires removing the crankset from the bike and utilizing a T30 Torx or appropriate hex key depending on your specific bolt hardware. Ensure that the alignment mark on the chainring is positioned correctly behind the crank arm to maintain proper shifting gate orientation. For long-term performance, regularly inspect the chain for wear, as a stretched chain will prematurely shorten the lifespan of your chainring teeth. Clean the drivetrain with a mild degreaser and apply a high-quality bicycle chain lubricant periodically to prevent corrosion and mechanical friction.