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Components & Drivetrain

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SRAM 107 BCD OVAL DROP-STOP B CHAINRING

 

DROP-STOP B 
SRAM 107 x 4 BCD

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POWERTRAC ELLIPTICAL 

The ultimate 1x chainrings for your SRAM 107 x 4 BCD crankset. They feature our patented Drop-Stop® design for the best wear life, chain retention, and mud clearance.

   

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PRODUCT
DESCRIPTION

SRAM 107 BCD OVAL DROP-STOP B CHAINRING

The Wolf Tooth 107 BCD Chainring for SRAM Cranks is compatible with most 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.

  • Fits 107 BCD for SRAM Cranks.
  • Drop-Stop technology: 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 which reduces friction.
  • Alternating wide/narrow tooth pattern prevents chain derailment.
  • 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

COMPATIBILITY

  • Fits 107 BCD spiders.
  • Chainline is determined by the crank model. See manufacturer specs for chainline.
  • 36t chainring will not work with the 107 BCD Quarq Power Meter
  • Use Drop-Stop B for all 9, 10, and 11spd chains or 12spd KMC, Connex, Wippermann, Campagnolo, SRAM Eagle, SRAM Road and Transmission (T-type) Flattop chains

POWERTRAC ELLIPTICAL

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 oval 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.

DROP-STOP TECHNOLOGY

Wolf Tooth’s patented Drop-Stop® wide/narrow tooth profile delivers ultimate chain retention and mud shedding ability.

2023 Wolf Tooth Drop Stop explainer

RECOMMENDATIONS

      • We recommend the use of a clutch style rear derailleur for the best chain security.
      • If you plan to ride in very muddy conditions, we recommend a chainguide or chainkeeper in addition to a clutch-type rear derailleur. Without these precautions, you may experience chaindrops and/or chainsuck.

 

2023 WOLF TOOTH CHAIN COMPATIBILITY LINK2023 WOLF TOOTH ELLIPTICAL

SPECIFICATIONS

Weights: 32T • 41g | 34T • 48g | 36T • 55g
Material: 7075-T6 aluminum
Made in the USA


The Story

Wolf Tooth was founded to design and manufacture precision cycling products that emphasize function, performance, and reliability to meet the needs of our fellow racers and riders.

We are a group of cyclists in Minneapolis, Minnesota that spend a lot of time talking about bike components. Like most detail-obsessed riders, we're always looking for new products that could make our bikes lighter, faster, more versatile, or more reliable. We pride ourselves on delivering premium products of the highest quality.