Wolf Tooth SRAM Direct Mount Boost Chainring

The 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 various tooth profiles to suit your drivetrain, including Drop-Stop B, which is optimized for SRAM T-Type Transmission and compatible with many other chains.

Drop-Stop A

The original Drop-Stop tooth profile. The wide teeth are wider than Drop-Stop B. Outside faces of narrow and wide teeth guide chain alignment.

Drop-Stop B

Tooth shape is nearly identical to Drop-Stop A, but has narrower teeth. Valley between teeth is deeper to accommodate larger rollers on Flattop chain. Outside faces of narrow and wide teeth touch chain to guide alignment.

Drop-Stop ST

Narrower teeth than Drop-Stop A. Wide teeth use Symmetric Trapezoidal (ST) profile to match extended inner edge on chain to create alignment (outside faces of wide teeth do not touch). Interaction of narrow teeth and chain are similar to Drop-Stop A and B.

Specifications:

• Weight:
  • 28T: 59 g
  • 30T: 65 g
  • 32T: 70 g
  • 34T: 75 g
  • 36T: 81 g
• Material: 7075-T6 aluminum
• Offset: 3 mm offset for 52 mm chainline or Transmission compatibility with Super Boost bikes

Compatibility:

• These direct mount chainrings will replace your existing chainring and spider or replace the direct mount ring on SRAM cranksets including the DUB cranks. The ring is attached via 3 bolts on the back side of the spider near the spindle. Note that these chainrings are NOT compatible with SRAM 8-bolt direct mount cranksets
• Also compatible with Cane Creek eeWings cranksets
• Drop-Stop A:
  • All 9, 10, and 11-speed Chains
  • 12-speed Chains:
    • SRAM® Eagle
    • Connex
    • Wippermann
    • Not compatible with 12s SRAM Transmission (T-Type) and Road Flattop, 12s Shimano HG+, 12s KMC, 12s Campagnolo, or 13s Campagnolo chains
• Drop-Stop B:
  • All 9, 10, and 11-speed Chains
  • 12-speed Chains:
    • Connex
    • Wipperman
    • Campagnolo
    • SRAM Eagle
    • SRAM Road and Transmission (T-type) Flattop chains
• Drop-Stop ST:
  • 12-speed Chains:
    • Shimano HG+
    • 12s KMC
    • Not compatible with all other chains
• Fat bikes: If your fat bike has a 170/177 rear hub spacing, use the standard 6 mm offset
• Praxis Works Road/CX cranks use the 6 mm offset. Praxis Works mountain cranks use the 3 mm offset for their DM-A and 0 mm offset for their DM-B chainrings