Wolf Tooth Elliptical 107 BCD Chainring for SRAM 42T Chainring

SRAM PowerTrac Elliptical (PTE) Wide/Narrow Elliptical Chainring for 107BCD Spiders. Unique design results in an elliptical ring that offers the benefit of 112 degrees top dead center after 10% (ovality) timing. Reduced spin in the "power zone" and natural pedaling in the "recovery zone." Wolf Tooth patented chainring. Wide tooth side provides maximum contact on the drive side, spreading the load and extending chainring life. Narrow side allows for mud and debris clearance, reducing friction. Alternating wide/narrow tooth pattern helps prevent chain drop. Compatible chains: 9-10-11spd or 12spd SRAM Eagle, SRAM Flattop, Campagnolo, KMC, Connex, or Wippermann chains Drop-Stop B Weight: 86g Material: 7075-T6 aluminum Compatibility: SRAM 107BCD spiders (not compatible with PM-RED-D1 / PM-RED-1-D1 / FC-RED-D1 / FC-FRC-1W-D1 / FC-FRC-W-D1 / PM-RIV-W-D1 / PM-RIV-1W-D1 / FC-RIV-W-D1 / FC-RIV-1W-D1 / PM-RIV-D1 / FC-RIV-D1)