Full Speed Ahead Headset Spacer Kit

This kit is designed specifically for standard 1-1/8 inch steerer tubes, which is the most common size found on modern road, mountain, and hybrid bikes. If you are unsure of your size, check your bike's specifications or measure the diameter of the steerer tube directly.

The kit includes a versatile mix of spacers to help you dial in your stack height: two 20mm spacers, three 10mm spacers, four 5mm spacers, and three 3mm spacers.

Yes, these are standard replacements. As long as your bike uses a 1-1/8 inch threadless headset system, these spacers will integrate seamlessly with your existing stem and headset components.

Having a range of sizes allows for micro-adjustments to your handlebar height. Smaller spacers like the 3mm and 5mm options are particularly useful for fine-tuning your fit, while the larger 10mm and 20mm spacers help you make more significant changes to your riding position.

You do not need specialized tools to install the spacers themselves, but you will need a set of hex keys to loosen and tighten your stem bolts. Remember that adjusting your stack height will require you to reset your headset preload, so ensure you have a basic understanding of how to properly tension your headset bearings.