FSA KFX Stem

The KFX is designed specifically for cross-country and trail riding. Its construction prioritizes a balance of low weight and high stiffness, making it ideal for technical terrain where precise steering control is essential.

This stem is compatible with handlebars that have a 31.8 mm clamp diameter, which is a standard size for most modern mountain bike setups. Please double-check your handlebar specifications before purchasing to ensure a proper fit.

The -12 degree angle creates a more aggressive, lower cockpit position compared to a neutral or positive-rise stem. This helps keep your front wheel planted on steep climbs and improves steering responsiveness, though it will require a more forward-leaning riding posture.

No, the CNC machining process is functional. It allows for precise material removal, which keeps the stem lightweight without sacrificing the structural integrity or stiffness required for aggressive trail riding.

Stem length significantly impacts your reach and steering speed. A 100 mm length is generally considered a longer reach, which can help stretch out a cockpit for better climbing efficiency, but it may feel less nimble than shorter stems on tight, technical descents.