You've probably seen one of these "ovalized" chainrings by now, and have been slapped in the face by curiousness like most of us have. Do things really make a difference in efficiency? The master minds over at Wolf Tooth Components aren't promising you a pair of wings here, but they aren't hesitant to relay that these elliptical rings do in fact have a much different feel to them that can provide more efficiency and a smoother power output. Their team of testers report the most noticeable benefits come on punchy singletrack and hills, allowing less shifting and snappier acceleration.
Wolf Tooth's take on the Elliptical chainring has an ovality of 10% and timing of 112 degrees after TDC (top dead center). What this does is eliminates 2 teeth where your pedal stroke is the weakest and adds 2 teeth where your stroke exerts the most power. For 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.
These rings are for use with 110 BCD Assmetric 4-bolt cranks.
Compatible with Dura Ace 9000, Ultegra 6800, 105 5800, Tiagra 4703, and Tiagra 4700
Mounts in the big ring position of the cranks but is offset inward for perfect chainline.
For 1x9, 1x10, or 1x11 drivetrains
Compatible with all 10 and 11 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).
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