BUCKLOS 11PCS Bike Headset Spacers 1-1/8" 28.6mm Aluminum MTB

BUCKLOS 11-Piece Bicycle Headset Spacer Set – 1-1/8" (28.6mm) Aluminum Alloy

Fine-tune your bike's stem and fork setup with the BUCKLOS 11PCS Headset Spacer Set. Precision-machined from forged aluminum alloy, these lightweight spacers let you dial in the perfect handlebar height for mountain bikes, road bikes, BMX, and more. Six different sizes in one pack means you'll always have the right spacer on hand for any build or adjustment.

Package Contents

• 11 spacers in 6 sizes: 3 × 2mm, 2 × 3mm, 2 × 5mm, 2 × 10mm, 1 × 15mm, 1 × 20mm
• Total weight: approx. 31g for the full set

Key Specifications

• Inner (Bore) Diameter: 28.6mm (1-1/8")
• Outer Diameter: 34.8mm
• Height Range: 2mm – 20mm
• Material: Forged Aluminum Alloy
• Combined Weight: ~31g
• Compatible with: Mountain bikes (MTB), road bikes, BMX, and most 1-1/8" threaded forks

Why Choose BUCKLOS Headset Spacers?

• Precision-Cut Smooth Edges: Automatic cutting technology ensures burr-free, smooth edges that won't scratch your fork steerer tube.
• Forged Aluminum Construction: Excellent temperature resistance and impact resistance for long-lasting durability on the trail or road.
• Tapered Lightweight Design: The unique tapered profile saves up to 40% weight compared to conventional aluminum spacers without sacrificing strength or compression resistance.
• Versatile Sizing: With 6 distinct heights, this set covers virtually every handlebar height adjustment scenario.
• Universal Fitment: 28.6mm inner diameter fits the vast majority of 1-1/8" fork steerer tubes on the market.

Perfect For

• Setting up a new bike build
• Adjusting handlebar height and reach
• Replacing worn or missing spacers
• MTB, road cycling, BMX, and cyclocross

Made in Mainland China.

Looking for more cycling and workshop essentials? Check out the 1PC 10g High Grade Silicon Grease Lubricant — ideal for keeping your headset bearings and O-rings running smoothly. You may also find the 3PCS Silicone Sealant Scraper Set useful for workshop maintenance tasks.

Learn more: HHS Move Your Way physical activity guidance

Frequently Asked Questions

Q: What bikes are compatible with the BUCKLOS 28.6mm headset spacers?

A: These spacers are designed for any bicycle with a 1-1/8" (28.6mm) fork steerer tube, which includes the majority of modern mountain bikes (MTB), road bikes, BMX bikes, cyclocross bikes, and hybrid bikes. Always measure your steerer tube diameter before purchasing to confirm compatibility.

Q: Can I mix and match the spacer sizes included in this set?

A: Absolutely! The set includes 11 spacers across 6 sizes (2mm, 3mm, 5mm, 10mm, 15mm, and 20mm), so you can combine them in any configuration to achieve your desired handlebar height. For example, stacking a 5mm and a 10mm spacer gives you 15mm of total height adjustment.

Q: Are these headset spacers suitable for carbon fork steerer tubes?

A: Yes. The smooth, precision-cut aluminum edges minimize the risk of scoring or damaging carbon steerer tubes. However, always follow your bike manufacturer's torque specifications when tightening the stem clamp over any spacer set.

Q: How much does the full 11-piece set weigh?

A: The complete 11-piece set weighs approximately 31g, making it an ultra-lightweight addition to your bike toolkit or parts bin.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.