Box Two Stem Spacers 1"

Product Overview

The Box Two Stem Spacer Kit is a set of five CNC-machined aluminum spacers designed to adjust stem height on BMX bikes with 1" steerer tubes. These spacers allow riders to fine-tune bar height from 1 to 20 millimeters in incremental steps, enabling proper cockpit geometry for comfort and control.

Key Features

• CNC-machined 6061-T6 aluminum — Precision-cut for consistent fit and minimal play at the stem interface
• Five-piece configuration — Includes 1mm (×2), 3mm, 5mm, and 10mm spacers for flexible height adjustment in single-millimeter increments
• Minimal weight — 6.7 grams per set keeps headset assembly light without sacrificing rigidity
• Universal compatibility — Fits all 1" steerer tubes and standard 22.2mm handlebars

Technical Specifications

• Spacer sizes — 1mm, 3mm, 5mm, 10mm
• Total adjustment range — 1 to 20mm when combined
• Material — 6061-T6 extruded aluminum
• Weight — 6.7 grams (0.24 ounces)
• Steerer tube diameter — 1" (25.4mm)
• Handlebar compatibility — Standard 22.2mm diameter

Compatibility and Ideal Use Cases

Use these spacers if your BMX bike has a 1" headset and you need to adjust bar height without replacing your stem. They're essential for dialing in reach and bar position after setup, accommodating different rider preferences, or correcting geometry changes from worn components. Keep a set on hand for quick adjustments between sessions or when sharing bikes between riders of different heights.