AFTERBURNER MEGAEXO modular crankset 1X


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A Look Inside FSA's Megatooth Technology

Our innovative Megatooth chainring has been developed to respond to the increasing demand 1/11 cranksets, designed to meet the needs of top level riders. The design allows the chainring to retain the chainring completely by itself. Find out more on our Megatooth technology in this video.

FSA MTB Chainrings - Which One is Right For You?

Full Speed Ahead offer mountain bikers a range of chainring options, ensuring that we meet the needs of the rider, whatever the requirement. Here one of our engineers discusses everything you need to know about our chainrings including gearing and drivetrain compatibility.


The 11/12 speed Afterburner has been completely redesigned for its highest performance yet with lighter crank arms, a smaller spider and AL7050 chainrings. The svelte new arms are hollow-forged from tough aluminum and clamp to a 30mm alloy axle for the ultimate rough-trail strength. The chainring bolts are also chromoly, while a clever design of the non-driveside arm eliminates the weak point of a pinchbolt. It’s available in 170mm and 175mm lengths. The chainring is CNC-machined from hard-wearing 7075 aluminium, and the whole crank is optimised for 11/12 speed drivetrains. The Megatooth chainrings ensure amazing security thanks to an ultra-deep profile and Narrow-Wide spacing that lock the chain on, and gearing ranges in two-tooth increments from 28T to a huge 38T. Overall weight is a paltry 695g. The sandblasted matte finish combines with polished highlights and sections of beautiful aluminum to exude a monolithic energy that belies its low weight. Subtle logos only enhance the look while laser etching means the graphics last too, no matter what the weather throws at them.


  • Convertible spider design for different chainring and chainline configurations
  • Thick-Thin tooth design for maximum chain engagement
  • Hollow forged AL7050 crank arms
  • 30mm alloy spindle
  • Direct mount forged then CNC machined AL7075 chainring
  • Optimized new 11-12 speed system


Code Type
313-0297433090 CK MTB AFTERBURNER Mod DM 1x 32T 170mm V18
313-0297435090 CK MTB AFTERBURNER Mod DM 1x 32T 175mm V18


Type Cranksets
Technology DirectMount, Hollow Forged, MegaExo, Megatooth, Modular
Discipline MTB
Color Neutral
Weight (gr) 695
Bolt Circle Diameter (BCD) DIRECT MOUNT
Crankset Type Single
Drivetrain Compatibility Shimano10/11S, Sram10/11S
Material Alloy