FSA Afterburner Stem

The FSA Afterburner Stem features a 31.8 mm handlebar clamp diameter, which is the standard size for most modern mountain bike handlebars. Please double-check your current handlebar's center diameter to ensure a proper fit before purchasing.

This stem is specifically engineered for aggressive trail riding and mountain biking. Its forged aluminum construction is designed to handle the stresses of technical terrain while providing the precise steering control needed for challenging descents and tight singletrack.

A 12-degree angle offers a slightly more upright or aggressive position depending on whether you flip the stem up or down. This geometry is optimized to provide trail stability and a confident feel, helping you maintain control on steep or technical sections.

Forging aligns the grain structure of the aluminum, which creates a stronger, more durable component compared to cast or CNC-machined alternatives. This process allows the stem to be lightweight without sacrificing the structural integrity required for off-road use.

A 70 mm length is a versatile choice for trail riding, offering a balance between responsive, quick steering and high-speed stability. If you are looking to change your bike's handling characteristics, a 70 mm stem is often a great middle-ground upgrade from longer, cross-country style stems.