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More power? Check. Better traction? Definitely. Less shifting? Yup. Funky uneven pedal stroke? Not with Wolf Tooth’s PowerTrac Elliptical™ (PTE) chainrings. Our proprietary design means a slightly less ovalized ring (10%) with less aggressive timing (112°) than competitors’ versions; any change to your pedal stroke is unnoticeable for most riders, but they still provide the POWER and TRACTION benefits inherent to oval chainrings.

It’s like having two chainrings in one! With PowerTrac Elliptical rings, the larger-diameter section of the ring engages with the chain at the optimal point on the downstroke, or “Power Zone,” – between 1-5 and 7-11 on a clock face – to take advantage of your body’s natural biomechanical POWER: For example, during this section, a PTE 34t ring is equivalent to a 36t round ring. Similarly in the “Recovery Zone” (11-1 and 5-7), the smaller section on the PTE ring engages, maximizing EFFICIENCY in the weakest part of the pedal stroke; here the PTE 34t ring is equivalent to a 32t round ring.

Additionally, the above provides a smoother, more efficient pedal rotation, which means better TRACTION. Steadier torque on the rear wheel means less spinning out in the “Power Zone,” while pedaling is easier during the “Recovery Zone,” so you maintain momentum.

 

 

NOTE
Additional SRAM Flattop compatible chainrings will become available throughout the summer. If you click on out of stock products you sign up to get an email notification when they are available.

 

Compatibility

  • These direct mount chainrings will replace your existing chainring and spider, which is attached via 3 bolts on the back side of the spider near the spindle.  You will use these same 3 bolts to attach the Wolf Tooth SDM® chainring. Note that the SRAM 12spd Red and Force AXS use a different 8 bolt mounting interface that is not compatible with these chainrings.
  • Also compatible with Cane Creek eeWing cranksets.

Chain Compatibility

  • 9, 10, 11, & 12spd Eagle - These chainrings are designed to work with all 9 speed, 10 speed, and 11 speed chains. They also work with 12 speed Eagle and 12 speed KMC chain. They do not work with Shimano 12 speed Hyperglide+ chain or SRAM 12 speed Flattop chain.
  • 10, 11, & 12spd Eagle and Flattop - These chainrings are designed to work with all 10 speed, and 11 speed chains. They also work with 12 speed SRAM Flattop, SRAM Eagle and KMC chain. They do not work with Shimano 12 speed Hyperglide+ chain.
  • Shimano 12-speed chains require the use of our Shimano 12-speed specific chainrings
  • If using a 9-speed drivetrain use a 10-speed chain. It fits tighter for better chain retention


  • There are 3 offsets:
    • Standard: 47mm chainline, 6mm offset for cyclocross and road cranks
    • Standard: 49mm chainline, 6mm offset for GXP and long spindle BB30  
    • Boost: 52mm chainline, 3mm offset
    • BB30: 49mm chainline, 0mm offset for BB30 short spindle cranks
  • Fat Bikes: If you are planning to use this on an X9 or XX1 fat bike crankset with a 190/197 rear hub spacing use the 0 offset ring.  If your fat bike has a 170/177 rear hub spacing, use the Standard 6mm offset
  • If you have a BB30 crankset (30mm diameter aluminum spindle) this measurement will determine whether it is a long or short spindle:
  • Ovality of 10% and timing of 112° after TDC (top dead center)
  • Maximum diameter is that of a chainring 2 teeth bigger than the size you order so be sure there is adequate chainstay clearance!
  • A T25 Torx wrench is required to remove the bolts that secure the chainring or spider to the crankarm. 
  • Wolf Tooth’s patented Drop-Stop® wide/narrow tooth profile for the ultimate chain retention and mud shedding ability

    • You will need chainring to chainstay clearance for a chainring two teeth bigger than the elliptical chainring (max diameter is that of a chainring two teeth bigger).
    • Compatible with all 10, 11, and 12-speed chains except Shimano 12-speed chains.
    • 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).
    • Ovality of 10% and timing of 112° after TDC (top dead center)
    • Maximum diameter is that of a chainring 2 teeth bigger than the size you order so be sure there is adequate chainstay clearance!
    • A T25 Torx wrench is required to remove the bolts that secure the chainring or spider to the crankarm. 
    • An L-wrench works best since the crank spindle may contact a socket adapter and prevent it from engaging properly.
    • Use the same 3 bolts to attach the Wolf Tooth ring or if you need, we carry replacement bolts

      Recommendations

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

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      Tech Specs

      Weight: 28t • 60g | 32t • 68g | 32t • 74g | 34t • 83g  36t • g | 38t • 82g  |  40t • 88g  |  42t • 96g
      Material: 7075-T6 aluminum
      Made in the USA 

      Patent and trademark information

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