Runwell HAKURIN Precision Hub/BB Spacer Kit

The Runwell HAKURIN Precision Hub/BB Spacer Kit is designed to help you fine-tune the position of your cog, crank, or bottom bracket to achieve the ideal chainline. Made from high-quality stainless steel, each micro-thin spacer lets you correct alignment down to fractions of a millimeter. An essential upgrade for fixed-gear, track, and performance-focused builds.

This 5-piece spacer kit includes all available thicknesses, giving you the flexibility to make accurate spacing adjustments whether you’re working on hubs or threaded bottom brackets.

What’s Inside
• 1 x 0.05 mm
• 1 x 0.1 mm
• 1 x 0.2 mm
• 1 x 0.3 mm
• 1 x 0.7 mm

Why It Matters
• Helps position cogs and cranks more accurately
• Allows you to achieve a straighter, more efficient chainline
• Reduces drivetrain drag caused by misalignment
• Lets you stack shims for precise combinations
• Durable stainless-steel construction ensures stability and longevity

Specifications
• Outer diameter: 39 mm
• Inner diameter: 35 mm
• Material: Stainless steel
• Not compatible with: Press-fit bottom brackets

Whether you're dialing in a pro track bike or optimizing your daily ride, the HAKURIN Spacer Kit gives you the control you need to fine-tune your setup with Japanese precision.