FSA PolyCarb Headset Spacer

These spacers are designed specifically for standard 1-1/8 inch steerer tubes, which is the most common size for modern road and mountain bikes. If your bike uses a tapered or straight 1-1/8 inch steerer, these will fit perfectly.

Polycarbonate is significantly lighter than aluminum and completely corrosion-resistant, meaning they won't seize or oxidize against your stem over time. They are an excellent choice if you are looking to shave a few grams or ride in wet, harsh conditions.

Yes, you can mix and match these with aluminum or carbon spacers without any performance issues. Just ensure the total stack height does not exceed the maximum recommended height for your specific fork's steerer tube.

This pack includes ten individual 10mm spacers, giving you a total of 100mm of adjustment range. This is plenty of material to dial in your cockpit height or experiment with different riding positions.

While polycarbonate is strong and durable, it is slightly less rigid than aluminum. They are perfectly suitable for most cross-country and trail riding, but if you are doing aggressive downhill or enduro riding, you might prefer the extra stiffness of metal spacers.