FSA Afterburner MegaExo Modular 11-Speed MTB Chainset

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.

Technology

Direct Mount

One piece chainring that combines spider and chainring for Modular Systems.

Hollow Forging Aluminium Technology

FSA manipulates a single block of 7050-T6 aluminum to yield a hollow crankarm with a superior strength-to-weight
ratio.

MegaExo Bottom Bracket

MegaExo outboard bearing bottom bracket fortified with double row bearings for each side. For use with downhill
MegaExo cranks.

MegaTooth

FSA way to indicate the Anti-drop chainrings, it’s the main feature for all the 1x FSA chainrings. Very long,
asymmetric teeth in a thick-thin alternation create a tremendously quiet and secure engagement.

FSA’s 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.

Modular

Interchangeable crankarm, spindle and spider / chainring system.

Features

• 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

Specifications

• Crankset Type: Single
• Bolt Circle Diameter (BCD): Direct Mount
• Drivetrain Compatibility: Shimano 10/11-Speed, SRAM 10/11-Speed
• Number of Holes: 4
• Material: Alloy
• Weight: 695g