SL-K BB392EVO modular crankset 1X


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Team Bianchi Countervail
Team Trek Selle San Marco

FSA BB392 Crankset for MTB

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.


FSA’s brand new range of high quality mountain bike cranksets are designed according to a fully-modular system. This means that any rider or mechanic can easily, quickly, and safely swap out the spider, spindles, and chainrings from one set to another. It also features a built-in chain-line adjustment system. This allows for Boost and traditional non-Boost configurations with the same cranksets. Essentially, one crankset works across any bike. The Modular system allows for the perfect combination of components, tailoring exact specification requirements to the individual rider and the type of terrain they’re facing, and for when the time comes to renew and upgrade components. Compatibility with all current and future standards mean that the flexibility – and value – of FSA’s modular cranks is unparalleled and the benefits can be shared by all riders, future-proofing your ride.


  • Convertible spider design for different chainring and chainline configurations
  • Hollow carbon composite arms with UD finish
  • 30mm forged AL7050 BB392EVO spindle
  • AL7075 100% CNC chainrings
  • Thick-Thin tooth design for maximum chain engagement
  • Optimized for new 11 speed system


Code Type
313-0257423030 SL-K CK Modular BB392 1x11 30T 170
313-0257425030 SL-K CK Modular BB392 1x11 30T 175
313-0257433030 SL-K CK Modular BB392 1x11 32T 170
313-0257435030 SL-K CK Modular BB392 1x11 32T 175


Type Cranksets
Technology BB392EVO, DirectMount, Megatooth, Modular
Discipline MTB
Series SL-K
Color Neutral
Weight (gr) 545, 485
Compatibility BB392
Bolt Circle Diameter (BCD) DIRECT MOUNT
Crankset Type Single
Drivetrain Compatibility Shimano10/11S, Sram10/11S
Material Carbon