BOX ONE 7075 ALLOY CHAINRING BOLTS

Product Overview

The Box One 7075 Alloy Chainring Bolt Kit is a set of CNC-machined aluminum chainring bolts designed to attach chainrings to BMX and single-speed cranks. Machined from 7075 aluminum and including multiple bolt lengths with matching nuts, this kit provides a lightweight alternative to steel chainring bolts while accommodating various chainring and crank configurations.

Key Features

• 7075 aluminum construction – High-strength aluminum alloy provides durability at reduced weight compared to steel bolts
• Multiple bolt lengths included – Kit contains both 8.5mm and 6mm front bolts to fit different chainring and spider thicknesses
• 5mm rear nuts – Matching rear nuts work with both bolt lengths for secure attachment
• Universal compatibility – Fits cranks with threaded chainring bolt holes and those requiring separate nuts
• Laser-etched logos – Permanent laser-etched branding won't fade or peel over time

Technical Specifications

• Material: 7075 aluminum alloy, CNC-machined
• Kit contents:
  • Five (5) x 8.5mm front bolts
  • Five (5) x 6mm front bolts
  • Five (5) x 5mm rear nuts
• Weight: 7g complete kit
• Finish: Anodized with laser-etched logos
• Bolt count: Five-bolt pattern (standard for most BMX chainrings)

Compatibility and Ideal Use Cases

This kit fits standard five-bolt chainrings and cranks—the most common configuration for BMX and single-speed drivetrains. The dual bolt length options (8.5mm and 6mm) accommodate different chainring and spider thickness combinations. Use the appropriate bolt length based on your specific chainring and crank setup—measure the total stack thickness (chainring + spider or crank arm) to determine which bolts provide proper thread engagement without bottoming out. The rear nuts work with cranks that do not have threaded chainring bolt holes, while cranks with threaded holes can use the bolts alone.

Best suited for weight-conscious riders who want to reduce drivetrain weight without compromising chainring security. The 7075 aluminum construction saves grams compared to steel bolts while maintaining adequate strength for BMX applications. Important: Aluminum bolts require careful installation—use appropriate torque and avoid overtightening, as aluminum threads can strip more easily than steel. Apply anti-seize compound to threads during installation to prevent galling. Check bolt tightness periodically, especially after initial installation, as aluminum may settle differently than steel under load. Ideal for racing applications where every gram matters, or for riders who prioritize lightweight components. Not recommended for riders who frequently remove and reinstall chainrings, as repeated tightening can wear aluminum threads—steel bolts offer better durability for frequent maintenance.