Full Speed Ahead Headset Spacers

Yes, these are designed for the standard 1-1/8 inch steerer tube diameter found on the vast majority of modern road, mountain, and hybrid bicycles. They will fit any fork with that standard measurement.

Each spacer in this set is 10mm tall. This allows you to make precise, incremental adjustments to your handlebar height by stacking or removing them as needed.

Polycarbonate is significantly lighter than aluminum, which helps keep your front end weight down. It is also a durable, non-corrosive material that won't seize or bond to your steerer tube over time.

The finish is integrated into the material, so it is quite resilient against minor scuffs and scrapes. While it may show wear over many years of heavy use, it holds its color much better than painted metal alternatives.

Yes, you can mix and match these with metal spacers without any performance issues. Just ensure that the total stack height is correct for your stem and that your top cap bolt is properly tightened to secure the headset.