Elliptical 96 mm BCD Chainrings for Shimano XTR M9000 and M9020

$64.95

Get better traction and acceleration when you use our Elliptical / oval chainrings!
Our proprietary design has ovality of 10% and timing of 112° after TDC (top dead center). These values provide the benefits of an oval ring without the drawbacks of greater ovality or more aggressive timing.  

The simplest way to explain how they "feel" is that where your pedal stroke is weakest it feels like you have a 2 teeth less on the chainring and where you have the most power it feels like you have 2 more teeth.  They feel this way because with the radius of the chainring constantly changing, the torque needed to turn the cranks is constantly changing to better match your power output.  Example: a 34t chainring feels like a 32t in the weak part of your pedal stroke and a 36t in the part of the stroke where your legs have the most power.

Check out this podcast for a simple explanation of Ellitpical ring benefits:

http://mountainbikeradio.com/engineer-corner/elliptical-chainrings/

These chainrings fit only the Shimano XTR M9000 and M9020 cranksets (race and trail respectively). They have an asymmetrical 96 mm BCD with built-in threaded standoffs to provide the ideal 1X chainline.

Compatibility:

  • These rings fit on the Shimano XTR M9000 and M9020 1x or 2x cranksets, and here are instructions on how to measure your BCD.  
  • Use only the stock Shimano XTR chainring bolts (M7)
  • You will not use the stock bolt caps when mounting this ring.  The stock bolts will thread in to the chainring's standoffs from the outside of the crankset.
  • For 1x9, 1x10, 1x11 and 1x12 drivetrains (including SRAM Eagle)
      • Compatible with all 10, 11, and 12 speed chains (Including SRAM Eagle)
      • If using a 9 speed drivetrain use a 10 speed chain (shifts and works well on a 9 speed drivetrain and fits the ring tighter for better chain retention).
    • Provide a great chainline on most boost bikes.  See this explanation for details.

     

    Complementing products:

    Must use the special stock chainring bolts.  The Wolf Tooth chainring bolts are a different size.

     

    Tech Specs:

    • Design and manufactured in Minneapolis, MN USA
    • Wolf Tooth’s patented Drop-Stop®  wide/narrow tooth profile for the ultimate chain retention and mud shedding ability.
    • Patent information here
    • Material 7075-T6
    • Colors - black
    • Chainline - 49 mm for 30-34T
    • If you plan to ride in very muddy conditions, we recommend a chainguide or chainkeeper in addition to a clutch-type rear derailleur! Without these precautions, you may experience chaindrops and/or chainsuck.
      • Weight - 30t - 36g, 32t - 51g, 34t - g


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