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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. Click HERE for detailed information on our PTE technology.
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.
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.
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).
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).
Design and manufactured in the Minneapolis, MN USA
Wolf Tooth’s patent pending Drop-Stop® wide/narrow tooth profile for the ultimate chain retention and mud shedding ability
Recommend the use of a clutch style rear derailleur for the best chain security.
Material - 7075-T6 aluminum
Colors - black
49mm for standard non-boost (135/142mm rear hub spacing) with 6mm or 0mm offset (see compatibility above for which offset you need
52mm for Boost with 3mm offset (148mm rear hub spacing)
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 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
Weight - 28t - 60g, 30t - 68g, 32t - 74g, 34t - 83g, 36t - g, 38t - 82g, 40t - 88g, 42t - 96g