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KFX BB392EVO Modular Crankset maximizes stiffness, minimizes weight, and adapts to any MTB setup
What Our Gearhead® Experts Are Saying:
“I’ve ridden a lot of cranksets, but the KFX stands out. It’s light enough for XC racing yet stiff and strong for technical trail riding. Plus, being able to swap chainrings and spindles without replacing the whole crank is a game changer for long-term use.”
The FSA KFX BB392EVO Modular 1x Crankset represents the pinnacle of FSA’s alloy crank technology. By starting with forged blanks, precision CNC machining, and advanced bonding, FSA created a hollow-arm crankset that offers unmatched stiffness-to-weight ratio in its class. The modular BB392EVO platform supports interchangeable spiders, spindles, and direct-mount chainrings, ensuring complete adaptability across disciplines.
AL7075 CNC chainrings deliver precise shifting and long-lasting durability, while the optimized Q-factor and 51.8mm chainline integrate seamlessly with today’s MTB drivetrains. At just 520g for the 30T model, the KFX is among the lightest alloy cranksets available, making it a top-tier choice for elite racers and serious trail riders alike.
Details
- Ultralight modular MTB crankset for XC and trail performance
- Forged and CNC-machined AL7050 arms with bonded hollow construction
- Modular design for easy swaps of spiders, spindles, and chainrings
- Compatible with Shimano and SRAM 11–12 speed drivetrains
- 100% CNC AL7075 chainrings for precision and durability
- Item #FSAD12F
- Arm Material
- AL7050 alloy
- Arm Length
- 165mm, 170mm, 175mm
- Chainring Sizes
- 32t
- Rings
- 1
- BB Type
- BB392EVO / PF30 (92mm)
- Spindle
- 30mm
- Q Factor
- 169mm
- Chainline
- 51.8mm
- Compatible Components
- Shimano/SRAM 11–12 speed
- Includes
- crank arms, spindle, chainring
- Claimed Weight
- 520g
- Activity
- cross-country, trail, enduro
- Manufacturer Warranty
- 2 years