All the advantages of an Absolute Black oval chainring on a Shimano XT crankset with this combo made by PureBike. Pedal efficiency, lightness and great look !
The SHIMANO DEORE XT FC-M8100 cranks features an entirely new construction, using direct mount chainrings interface and a 172mm Q-factor. The hollow forged crank maximizes power transfer while limiting weight. Rigid and lightweight , the Shimano XT FC-M8100 crank arms are designed for aggressive trail riding
Crank arms Features
- Model : FC-M8100-1
- Serie : Deore XT
- Cassette compatiblity : 12 vitesses
- Technologies : Hollowtech II
- Chainring mount : direct mount
- Chainring : direct mount 28-30-32-34-36 Teeth
- Oval chainring
- Arm length : 165, 170, 175 mm
- Axle diameter : 24 mm
- QFactor : 172 mm
- Recommended BB : BB-MT800 ou BB-MT800-PA (vendu séparement)
- Chainline : 52 mm
- Threaded BB compatibilty : 68-73 mm
- Press Fit BB compatibility : 89-92 mm
- Chain compatilbity : 12 speed Shimano (HG12) only
- Chainring compatibility : Direct Mount Shimano only
- Crank fixing bolt included
Included
- Shimano Deore XT M8100-1 Crank Arms
- Crank Arm Fixing Bolt
- Chainring Lockring
Absolute Black The Original one and only absoluteBLACK Premium, Shimano 12spd Hyperglide+ compatible Direct mount 1X Oval traction chainrings are designed for XTR M9100, XT M8100 & SLX M7100 cranks. They feature the exact same excellent oval shape as rest of our oval chainring portfolio. This new type of direct mount chainring will make your Shimano crank looking great and perfectly mesh with Shimano 12spd Hyperglide+ chain. This particular chainring will ONLY works with CN-M9100, 8100 & 7100 Shimano 12spd Hyperglide+ chain due to different thickness of the teeth
Features
- Material : CNC machined 7075 Txxx Aluminum. Long-lasting
- Finish : Type II anodizing
- Teeth : 28T, 30T, 32T, 34T, 36T
- 28T oval chainring has an ovality of 26/30T and is best for someone who uses currently 26 or 28T round ring
- 30T oval chainring has an ovality of 28/32T and is best for someone who uses currently 29 or 30T round ring
- 32T oval chainring has an ovality of 30/34T and is best for someone who uses currently 31 or 32T round ring
- 34T oval chainring has an ovality of 32/36T and is best for someone who uses currently 33 or 34T round ring
- Shape : Oval
- Mount : Direct Mount Shimano
- Crankset compatibility : Shimano XTR M9100, XT M8100 and SLX M7100 cranks series
- Chain options : Shimano 12 speed chain only
- Not compatible with other chains
- Chainguide needed : No. (but for very aggressive enduro riding it is recommended to use an upper chain guide or at minimum bashguard.)
- Oval chainring does not affect the work of rear dérailleur cage at all.
- Chain Length : Bypassing the rear derailleur, run the chain around front chainring/largest cog combination. (For the full suspension frame, position the rear suspension for the greatest chain length required. It's usually a normal position where rear shock if fully extended) Add 2 to 4 segments of the chain to this length for proper chain length.
- Designed in UK. Manufactured in Poland (EU)
- Colour : Grey
- Advantages of Absolute Black oval chainrings
- AB have mastered their oval chainrings to perfection, so you can get best possible advantage from the oval/elliptical shape.
- Finest design to provide excellent weight to strength ratio
- One of a kind special oval shape (Patent Pending)
- Greatly improves traction and climbing abilities
- Unique Patent Pending narrow-wide teeth profiles to keep your chain in place for minimum 12 months!
- Special 3D teeth machining for ultimate mud relief decrease wear and noise dramatically
- All rings have built in threads for easy of mounting and reduction in weight
- Superb quality and great look.
- You will ride faster using ovals. If you keep using round ring then others will get quicker.
- You will not "feel" the oval shape at all
- Reduces stress on knees
How to mount Absolute Black Oval Chainring
Using the removal Tool (like BBB BTL-116 or Shimano TL-FC41 ), carefully open the lockring that holds the chainring on the crank(normal threads). Once the lockring is removed, take off old chainring, re-grease the splines on the crank. Place new oval chainring with convex side to the crank. Chainring/crank has special splines that only fit one way. Close the lockring to 35-50Nm of force. Chainring is only compatible with XTR CN-M9100 chains. Using other chains may cause chain to drop very easily from the chainring due to thinner than usual teeth
Chain compatibility
These specific chainrings are only compatible with Shimano HG+ 12 speed chains (CN-M9100, CN-M8100 , CN-M7100) due to specific tooth profile. Using other chains may cause chain to drop very easily from the chainring due to thinner than usual teeth.
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