AFTERBURNER modular crankset 1X

€143.50 $158.99
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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.


Crank arms, a smaller spider and chainring – the 11-speed Afterburner has been completely redesigned for its highest performance yet. Those svelte new arms are hollow-forged from tough aluminum, and clamp to a 24mm chromoly steel axle for the ultimate rough-trail strength. Chainring bolts are also chromoly, while 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-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 26T to a huge 38T. Overall weight is a paltry 716g. And after all that thought, we painted it black… but it still looks special. Sorry about that. The sandblasted matt 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. Laser etching means the graphics last, too, whatever the weather throws at them.


  • Convertible spider design for different chainring and chainline configurations
  • Thick-Thin tooth design for maximum chain engagement
  • Hollow forged AL6061 crank arms
  • 24mm chromoly spindle
  • Direct mount forged then CNC machined AL7075 chainring
  • Optimized new 11 speed system


Code Type
313-0165433090 AFTERBURNER CK Modular 1x11 DM 32T 170
313-0165435090 AFTERBURNER CK Modular 1x11 DM 32T 175


Type Cranksets
Technology DirectMount, Hollow Forged, MegaExo, Megatooth, Modular
Discipline MTB
Weight 695
Bolt Circle Diameter DM
Compatibility Mega Exo 24mm
Crankset Type Single
Drivetrain Compatibility Shimano10/11S, Sram10/11S
Material Alloy