• FSA Afterburner MegaExo 386 Chainset

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FSA Afterburner MegaExo 386 Chainset

Joining the K-Force Light MTB Compact, the 386 version of Afterburner uses the same 3 bolt spider with 86mm BCD standard to allow smaller inner chainrings.

A unique system to bring the benefit of lightweight XC performance to sport level riders.


  • Hollow forged alloy arms
  • 24mm chromoly spindle
  • Chrome steel MegaExo bearings
  • AL-7075 100% CNC process chainrings
  • AL7075 Torx T-30 alloy chainring bolts
  • MegaExo oversize cartridge bearings
  • Oversize splined integrated chromoly BB Axle
  • MegaExo alloy bearing cups
  • Length: L170mm, L175mm
  • Q-Factor: 170mm
  • BCD: 86mm
  • Chainline: 48mm
  • BB cups: BC-1.37 inch x 68mm or 73mm
  • Weight: 877g inc BB


  • X-10 suits SRAM 10 Speed Drivetrains
  • M10 suits for Shimano10 speed drivetrains

To help you choose which crankset to buy, here is a FSA Crankset/Bottom Bracket Compatibility Chart.

Buy FSA Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

  • Delivery costFREE
  • Delivery toUSA
  • 365 Days return or exchange

    If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or the component hasn’t been fitted.

    More information on returns
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Buying Guide

  • We've got everything you need to know in our buying guide.