FSA Afterburner Stem

Yes, this stem is designed for a 31.8 mm handlebar clamp diameter, which is the most common standard for modern mountain bike bars.

The 12-degree angle is relatively versatile. Depending on whether you flip the stem up or down, it allows you to fine-tune your cockpit height for either a more upright, comfortable position or a lower, more aggressive stance for climbing.

This stem weighs 144 grams, making it a solid, reliable option that balances durability with weight savings for trail riding.

Yes, it is designed for a standard 28.6 mm (1 1/8 inch) threadless steerer tube, which is the industry standard for almost all modern mountain bikes.

This construction method creates a stronger, more consistent grain structure in the alloy compared to basic casting. It results in a stem that is both lighter and more resistant to the stresses of aggressive trail riding.

The stack height is 40 mm. This is the amount of vertical space the stem takes up on your steerer tube, which is important to know if you are trying to match your current cockpit setup or have limited space on your fork's steerer tube.