1-1/8" Alloy Headset Spacers For BMX, MTB, Road Bike - 3mm, 5mm, 10mm, 15mm, 20mm Sizes

Need to adjust your bike's handlebar height? These headset spacers let you fine-tune your fit. They're made from lightweight aluminum, silver color, and fit standard 1-1/8 inch steerer tubes (the most common size). Available in various thicknesses: 3mm, 5mm, 10mm, 15mm, and 20mm—so you can mix and match to get the exact stack height you want. From MTB brand, part number ULTRA10346. Made in the United Kingdom. Works with BMX, mountain bikes, road bikes, basically any bike with a threadless headset. Just slide them onto your steerer tube below or above the stem. A simple, affordable way to dial in your riding position for better comfort and control. Essential for bike builds and adjustments.