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Logo for PowerTrac Elliptical, Wolf Tooth's proprietary design for bike chainrings.

More power, better traction, less shifting. Wolf Tooth oval chainrings use our proprietary PowerTrac design that has all the benefits of oval, but without the funky, uneven pedal stroke. Ride one once and you’ll wonder why you waited so long to try oval.

Think of an oval chainring as two chainrings in one. A major benefit of oval is how the shape of the chainring alters your gearing in two important phases of your pedal stroke by harnessing your body’s natural biomechanics. Here’s how it works. The area of the chainring with the larger diameter engages with the chain at the optimal point on the downstroke, which is what’s known as the Power Zone. If you were to look at a clock, the Power Zone would be between 1-5 and 7-11. Conversely, the Recovery Zone – back to the clock face, between 11-1 and 5-7 – is the weakest part of the pedal stroke, when the oval maximizes your efficiency. A 34T oval chainring behaves like a 36T chainring when you want power, while behaving like a 32T chainring when you’re climbing.

We’ve also engineered our oval chainrings to provide smoother, more efficient pedal rotation. This equates to better traction because of steadier torque on the rear wheel. With a Wolf Tooth oval chainring, you can harness more of your strength in the Power Zone, while having easier pedaling in the Recovery Zone.


Compatibility

  • These rings fit on the Shimano XTR M9000 and M9020 1x or 2x cranksets
  • Use only the stock Shimano XTR chainring bolts (M7x.75)
  • You will not use the stock bolt caps when mounting this ring.  The stock bolts will thread into the chainring's standoffs from the outside of the crankset.
  • Wolf Tooth’s patented Drop-Stop® wide/narrow tooth profile for the ultimate chain retention and mud shedding ability.
  • For 1x9, 1x10, 1x11 and 1x12 drivetrains (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.
  • Chainline - 49mm for 30-34t

 

 

Recommendations

  • 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.
  • Recommend the use of a clutch style rear derailleur for the best chain security.

Related Products

6mm bolts

Tech Specs

Weight: 30t • 36g   32t • 51g  |  34t • 59g
Material: 7075-T6 aluminum
Made in the USA


Patent and trademark information


Wolf Tooth is committed to provide the most precision components possible and has three different tooth profiles for optimal performance based on your chain type.


Tooth Profile

Tooth Profile

Drop-Stop® B

Drop-Stop® A

Drop-Stop® ST

Chain Compatibility

Chain Compatibility

All 9s, 10s, and 11s Chains

12s Chains:

  • Connex
  • Wipperman
  • Campagnolo
  • SRAM Eagle
  • SRAM Road and Transmission (T-type) Flattop chains

Not compatible with 12s Shimano HG+, KMC, or 13s Campagnolo chains

All 9s, 10s, and 11s Chains

12s Chains:

  • SRAM® Eagle
  • Connex
  • Wippermann

You can use Drop-Stop B when Drop-Stop A is not available*

Not compatible with 12s SRAM Transmission (T-Type) and Road Flattop, 12s Shimano HG+, 12s KMC, 12s Campagnolo, or 13s Campagnolo chains

12s Chains:

  • Shimano HG+
  • 12s KMC

Not compatible with all other chains

Details

Details

Tooth shape is nearly identical to Drop-Stop A, but has narrower teeth. Valley between teeth is deeper to accommodate larger rollers on Flattop chain. Outside faces of narrow and wide teeth touch chain to guide alignment.

Drop Stop B Chainrings navigate_next

The original Drop-Stop tooth profile. The wide teeth are wider than Drop-Stop B. Outside faces of narrow and wide teeth guide chain alignment.

Drop Stop A Chainrings navigate_next

Narrower teeth than Drop-Stop A. Wide teeth use Symmetric Trapezoidal (ST) profile to match extended inner edge on chain to create alignment (outside faces of wide teeth do not touch). Interaction of narrow teeth and chain are similar to Drop-Stop A and B.

Drop Stop ST Chainrings navigate_next

*We are in the process of migrating most Drop-Stop A to Drop-Stop B to make them compatible with  SRAM Road and Transmission (T-type) Flattop chains.