Our Premium 1X 104 & 64bcd Oval traction chainrings are designed for any cranks that use 104bcd mounting interface.
This is the most common mounting standard for Shimano and other 4 arm cranks.

Chainline: 26&28T (64bcd) - 46mm ; 30T - 48mm ; 32T - 48.5mm ; 34&36T - 50mm
Ovality: Optimised to each size separately. Range: 10.2-14.4% and Timing of 110.5-116.3° after TDC (top dead centre) Patent Pending
Size: (Mass +/-1g):

• 64BCD: 26T (35g), 28T (42g)
• 30T 104BCD: 36g - comes with special bolts and spacers
• 104BCD: 32T (41g), 34T (44g), 36T (53g)

Advantages of our special Oval chainrings:

• Finest design to provide excellent weight to strength ratio
  
• One of a kind special oval shape (Patent Pending)
  
• Unique Patent Pending narrow-wide teeth profiles to keep your chain in place for minimum 12 months!
  
• Special 3D teeth machining for ultimate mud relief decrease wear and noise dramatically
  
• Designed to handle mud and grass with easy
  
• Superb quality and great look.
  
• You will ride faster using ovals. If you keep using round ring then others will get quicker.
  
• Reduces stress on knees and helps to maintain your legs fresher for longer.
  
• You will not "feel" the oval shape at all.

Applications

All cranks with 4x 104BCD interface. That means Shimano XT / Zee / Deore / SLX / XTR, Race Face, FSA, E13 and many more. 9, 10, 11 and 12spd Eagle compatible.

Need a hand to mount your new CR: follow this link to the aB website for full instructions