The FSA KFX range could be the lightest production XC components on sale

Can FSA’s KFX bar, stem, seatpost and cranks rival Schmolke’s ultra-light kit?

KFX cranks

FSA is an Italian company with a flair for details, producing everything from drivetrains and brakes to wheels and power meters, and most recently a brand new electric bike hub-mounted motor.


But the hub-mounted motor isn’t the only new thing to come out of Italy this week, with the announcement of its latest ultra-light marathon and cross-country-friendly KFX range of parts at Eurobike.

Included in the KFX range is a crankset, handlebar, stem and seatpost.

FSA KFX Modular crankset

KFX cranks
The cranks use a direct-mount chainring system.
Alex Evans

Made using hollow-forging techniques, the alloy arms are constructed in two pieces that are bonded together. This, FSA claims, helps the cranks to maintain exceptional stiffness while being mega-light.

KFX cranks
The KFX cranks feel light but look purposeful.
Alex Evans

Available in 170mm and 175mm lengths and with 30-, 32-, 34-, 36- and 38-tooth chainrings the cranks are compatible with both Shimano and SRAM 10- and 11-speed systems. FSA claims the cranks and chainring (30-tooth) weigh an impressive, claimed, 520g all in.

The crankset is priced at €399.99.

FSA KFX handlebar

KFX bars
The KFX bars have a gloss/matt split finish.
Alex Evans

Using FSA’s Integrated Cable Routing (ICR) technology the new KFX bars look sleek, with the bike’s brakes, gear and dropper post cables routed internally through the bars, stem and headset and, finally, internally through the frame.

FSA ICR system
The ICR system is located on the underside of the bar.
Alex Evans

They’re made from a full carbon construction and have reinforced brake lever and bar end sections. Available in a flat and riser version, both bars use a 31.8mm clamp and come in 700mm or 760mm and 660mm and 700mm widths respectively.

FSA KFX bar exit port
The exit port allows the cable to enter the stem. Unfortunately, there isn’t a dedicated KFX ICR stem, yet.
Alex Evans

FSA claims the bars weigh a claimed 160g for the 700mm wide flat-version and 155g for the 700mm wide riser-bar and cost €189

FSA KFX stem

KFX stem
The stem is simple and light.
Alex Evans

Made from a 3D forged, CNC machined AL2014 alloy, the stem has Carbon Structural Integration (CSI – no, not Miami) and uses titanium hardware.

It’s available from 60mm to 110mm in 10mm increments and has a 12 degrees rise or drop depending on the stem’s orientation.

The 100mm stem weighs an impressive claimed 143 grams and will set you back €179.

FSA KFX SBO seatpost

KFX seatpost
The seatpost has a Di2 battery adaptor in it.
Alex Evans

The one-piece, carbon-made KFX seatpost has a forged alloy top clamp and features zero layback for forward saddle placement and a Di2 battery adaptor.

KFC top clamp
The top clamp is forged alloy.
Alex Evans

It comes in both 27.2mm and 31.6mm diameters and is 400mm uncut. In the smaller diameter option, and cut down to 350mm, the post weighs a claimed 181g and costs €219.