Wolf Tooth Components
Elliptical 107 BCD Chainring for SRAM - Drop Stop B

The Wolf Tooth 107 BCD Chainring for SRAM Cranks is compatible with most new SRAM 1x road cranks that use the 107 BCD spider, including the SRAM AXS Power Meter Spider. This chainring uses the patented Wolf Tooth Drop-Stop B Wide/Narrow tooth profile that is optimized for drop bar bikes.

In line with Wolf Tooth’s guiding ethos of providing unrivalled design innovation, reliability and durability, this chainring employs a patented Drop-Stop® wide-narrow tooth profile, which not only keeps the chain securely in place on single chainring setups but dislodges mud, dirt and excess precipitation more efficiently.

Synonymous with ultra-high-end custom builds and stalwart steeds alike, Wolf Tooth chainrings are machined entirely in-house at Wolf Tooth’s HQ in Minnesota, USA. The anodised finish and machined lettering that adorn every chainring are hallmarks of master craftsmanship.

PowerTrac

Wolf Tooth’s PowerTrac design, as the name indicates, is driven by a concern for power and traction – and crucially for you, premised on a wealth of knowledge from precision engineers who also love to ride bikes.

A growing number of riders are converting to elliptical chainrings on 1x setups, for the simple reason that they have been demonstrated to improve ride quality.

The idea behind elliptical chainrings can be summarised as follows: biomechanical power output varies throughout a pedal stroke. Positions where power is higher have a larger diameter section of chainring, and thus a greater engagement area, which translates into greater forward propulsion. At positions where biomechanical power is lower, a smaller chainring diameter means greater efficiency in rotation. Overall, what this means for you is maximised power output throughout each pedal stroke.

Wolf Tooth notes that elliptical rings also mean steadier torque on the rear wheel, as there is less spinning on the downstroke and easier rotation as a result. Steadier torque on the rear wheel gives better traction and sustained momentum – great on tough climbs and when riding on loose terrain.

If you’re a discerning cyclist, looking to invest in a premium grade chainring that will outlast its competitors and function perfectly on a 1x setup, this is the only way to go.

Key features:

• Patented Drop-Stop® wide-narrow tooth profile for minimised dropped chains
• Fits 107 BCD for SRAM Cranks
• Chainline is determined by the crank model. See manufacturer specs for chainline. 
• Drop-Stop technology prevents dropped chains. On Wolf Tooth’s patented wide/narrow chainring, the wide side of the tooth has maximum contact on the drive side which spreads the load and improves chainring life. The narrow side allows clearance for mud and debris while reducing friction.
• Cranks that use the 107 BCD spider also use the SRAM 8-bolt interface, which is compatible with Wolf Tooth Direct Mount Chainrings for SRAM 8-Bolt
• Machined in-house at Wolf Tooth’s HQ in Minnesota, USA
• Beautiful, anodised finish

Technical Specification:

• Weight: 38t • 75g |  40t • 78g  |  42t • 86g 
• Material: 7075-T6 aluminum
• Made in the USA

Compatibility:

Compatible -

•  SRAM RED   -  FC-RED-1-D1
•  FORCE 1 AXS POWER METER  -   PM-FRC-1-D1
•  FORCE AXS POWER METER  -   PM-FRC-D1
•  FORCE CRANKSET   -  FC-FRC-D1
•  FORCE 1 CRANKSET  -   FC-FRC-1-D1

Not Compatible - 

•  RED AXS POWER METER   -  PM-RED-D1
•  RED 1 AXS POWER METER  -   PM-RED-1-D1
•  RED CRANKSET   -  FC-RED-D1
•  FORCE 1 WIDE CRANKSET  -   FC-FRC-1W-D1
•  FORCE 43/30 WIDE CRANKSET  -   FC-FRC-W-D1
•  RIVAL AXS 43/30 WIDE POWER METER   -   PM-RIV-W-D1
•  RIVAL 1 AXS WIDE POWER METER  -   PM-RIV-1W-D1
•  RIVAL 43/30 WIDE CRANKSET   -  FC-RIV-W-D1
•  RIVAL 1 WIDE CRANKSET   -  FC-RIV-1W-D1
•  RIVAL AXS POWER METER   -  PM-RIV-D1
•  RIVAL CRANKSET  -   FC-RIV-D1