Wolftooth SRAM Boost DM Elliptical Drop-Stop B Chainring

Our direct mount chainrings for SRAM cranksets replace your existing spider and chainring with one clean looking, lightweight, and stiff piece of machined billet. They are available in 3 different offsets: standard 6mm offset, Boost 3mm offset, and BB30 short spindle/Superboost 0mm offset.

These direct mount chainrings will replace your existing chainring and spider or replace the direct mount ring on SRAM cranksets, including DUB cranks. The ring is attached via 3 bolts on the back side of the spider near the spindle. 

This Elliptical chainring is designed for Boost drivelines and is compatible with all chains except Shimano HG12+.

CHOOSE YOUR OFFSET

• Standard Road/CX/Gravel: 6mm offset for cyclocross and road crank applications with 47mm chainline
• Standard MTB: 6mm offset for non-Boost mountain bikes, GXP and long spindle BB30 cranks for 49mm chainline
• Boost: 3mm offset for 52mm chainline
• BB30: 0mm offset for BB30 short spindle cranks for 49mm chainline
• Fat bikes: If your fat bike has a 170/177 rear hub spacing, use the standard 6mm offset
• Praxis Works Road/CX cranks use the 6mm offset. Praxis Works mountain cranks use the 3mm offset for their DM-A and 0mm offset for their DM-B chainrings.

DROP-STOP TECHNOLOGY

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

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 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.

RECOMMENDATIONS

• We recommend the use of a clutch style rear derailleur for the best chain security.
• We recommend using a T25 L-Wrench or similar for removal and installation of the bolts. 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 we carry replacement bolts
• For a longer lasting and more durable option, check out the CAMO System that offers stainless steel chainrings.

SPECIFICATIONS

Weights: 28t • 60g | 30t • 68g | 32t • 74g | 34t • 83g | 36t • g | 38t • 82g | 40t • 88g | 42t • 96g
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.