120 BCD Chainrings Buy Cheap 2025 Newest

120 BCD cranksets were introduced with SRAM 2×10 drivetrains and are excellent candidates for a 1x conversion with our patented Drop-Stop^® chainrings. These rings will allow you to convert your 120 BCD crankset, like the SRAM XX and others, to a 1x drivetrain.

• Fits 120 BCD cranksets or 4-bolt spiders

• 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

• These rings fit any 120 BCD crankset or 4-bolt spider.
• You must use M10x.75 bolts with a shoulder on them. These are not standard bolts and Wolf Tooth’s bolts will not work with this chainring. Note that only about 3 threads will engage (same with the stock SRAM rings)
• SRAM is the only supplier of the  M10 x .75 bolts 
• 36t is the smallest number of teeth that fits on a 120 BCD
• If using a 9-speed drivetrain use a 10-speed chain (shifts and works well on a 9-speed drivetrain and fits the ring tighter for better chain retention).
• Chainline – 51mm for 36t and 52mm for 38t (38t is wider for more chainstay clearance)
• NOT compatible with FSA 4 bolt cranksets