Wolf Tooth 104 BCD Chainring

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. The Drop-Stop® tooth design is the best performing and longest lasting wide/narrow chainrings on the market.

Features:

• 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
• Chainring Bolts: All tooth sizes require 1x bolts that are 6 mm long with exception to 30T rings which are threaded and require bolts that are 7 - 10 mm long. Wolf Tooth carries both sizes in a variety of colors.
  • 104 x 30T - use 10 mm bolts
  • 104 x 32T, 34T, 36T, 38T use 6 mm bolts
  • If using a bashring, you will need 8 mm bolts (most stock bolts on 3x cranksets are 8 mm)
• 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
• Drivetrains: 1 x 9, 1 x 10, 1 x 11 and 1 x 12 drivetrains. If using a 9-speed drivetrain, use a 10-speed chain. It fits tighter for better chain retention
• Available in two different tooth profiles for optimal performance based on your chain type. Use Drop-Stop ST for use with Shimano 12-speed Hyperglide+ chains. Use Drop-Stop A for all 9, 10, and 11 speed chains or 12-speed SRAM Eagle, KMC, Connex or Wippermann chains

Specifications:

• BCD: 104
• Speed: 9 - 12
• Chainring Bolts: 4
• Narrow-Wide Design: Yes
• Material: 7075 Aluminum

BCD Measurement Guide.