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104 BCD is the most common bolt pattern on double and triple cranksets and happens to be the first product ever made by Wolf Tooth Components. This chainring started it all for us. The Drop-Stop® tooth design is the best performing and longest lasting wide/narrow chainrings on the market. 

  • Fits any 104 BCD crankset.

  • 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.

Compatibility

  • Fits any 104 BCD crankset.
  • Designed to meet the requirements for E-bike use.
  • Chainring Bolts: All tooth sizes require 1x bolts that are 6mm long with exception to 30T rings which are threaded and require bolts that are 7-10mm long. 
    • 104 x 30T - use 10mm bolts.
    • 104 x 32T, 34T, 36T, 38T use 6mm bolts, unless using a Bash ring.
    • Chainring bolt requirements for bashring
      • 104 x 30T - 10mm bolts are required for use with the bashring.
      • Other 104 BCD sizes - you will need 8mm bolts (stock size that comes on 3x cranksets holding the middle and big rings on). Wolf Tooth does not make these.
  • 32T 104 BCD chainrings work on many older 2x Shimano crankset (XT, SLX, or Deore).
  • All sizes of 104 BCD chainrings are compatible with QUARQ power meters.
  • The Wolf Tooth 30T is the only 104 BCD chainring made in the market, and it is compatible with Quarq. This chainring is offset 2mm.
  • Drivetrains: 1x9, 1x10, 1x11 and 1x12 drivetrains
    • If using a 9-speed drivetrain, use a 10-speed chain. It fits tighter for better chain retention.



 

Recommendations

  • 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.

Related Products 

64 BCD chainring if you need something smaller than a 30T 

104 BCD Stainless Steel Chainrings

Chainring bolts

104 BCD bashring

Tech Specs

Weight: 30T • 36g | 32T • 47g | 34T • 56g | 36T • 60g | 38T • 66g
Material: 7075-T6 aluminum
Made in the USA

Patent and trademark information

Wolf Tooth is committed to provide the most precision components possible and has three different tooth profiles for optimal performance based on your chain type.


Tooth Profile

Tooth Profile

Drop-Stop® B

Drop-Stop® A

Drop-Stop® ST

Chain Compatibility

Chain Compatibility

All 9s, 10s, and 11s Chains

12s Chains:

  • Connex
  • Wipperman
  • Campagnolo
  • SRAM Eagle
  • SRAM Road and Transmission (T-type) Flattop chains

Not compatible with 12s Shimano HG+, KMC, or 13s Campagnolo chains

All 9s, 10s, and 11s Chains

12s Chains:

  • SRAM® Eagle
  • Connex
  • Wippermann

You can use Drop-Stop B when Drop-Stop A is not available*

Not compatible with 12s SRAM Transmission (T-Type) and Road Flattop, 12s Shimano HG+, 12s KMC, 12s Campagnolo, or 13s Campagnolo chains

12s Chains:

  • Shimano HG+
  • 12s KMC

Not compatible with all other chains

Details

Details

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 B Chainrings navigate_next

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 A Chainrings navigate_next

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.

Drop Stop ST Chainrings navigate_next

*We are in the process of migrating most Drop-Stop A to Drop-Stop B to make them compatible with  SRAM Road and Transmission (T-type) Flattop chains.

WARNING Handling this product will expose you to chemicals, including lead, known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For further information go to www.P65Warnings.ca.gov.