Box Three Chain Tensioners

Box Three Chain Tensioners

Product Overview

The Box Three are lightweight chain tensioners featuring a single-hole "lollipop" design that simplifies chain tension adjustment and rear wheel lock-down. Compatible with 10mm bolt-on axles, they provide straightforward tensioning without excess material or complexity.

Key Features

• Single-Hole Lollipop Design – Minimalist geometry reduces weight while maintaining functional chain tensioning capability
• Lightweight Construction – Minimal material usage ideal for weight-optimized racing builds
• Tool-Free Adjustment – Quick chain tension adjustment without requiring multiple tools or complex setup
• Rear Wheel Lock-Down – Helps secure rear wheel in dropouts and maintain consistent chain alignment
• 10mm Bolt-On Compatible – Fits 10mm bolt-on dropout spacing on traditional BMX frames
• Straightforward Installation – Simple design minimizes assembly complexity
• Reliable Performance – Proven tensioner geometry ensures consistent chain tension maintenance

Technical Specifications

• Design: Single-hole lollipop tensioner
• Axle compatibility: 10mm bolt-on
• Material: Lightweight aluminum or steel (standard tensioner construction)
• Quantity: Pair (left and right tensioners)
• Finish: Standard black or anodized

Compatibility & Ideal Use Cases

• 10mm bolt-on frames – Compatible with traditional bolt-on dropout spacing
• Chain tensioner systems – Standard BMX setup requiring dual tensioners for proper chain alignment
• Weight-optimized builds – Minimal material reduces rotational weight
• Single-speed and fixed-gear setups – Essential for maintaining consistent chain tension without derailleurs
• Racing and freestyle – Suitable for all BMX disciplines requiring rear wheel lock-down
• Quick adjustments – Tool-free design allows rapid tensioning during practice or between heats
• All rider types – Suitable for beginners through professional racers

Build Requirements & Compatibility

• 10mm bolt-on dropouts – Verify your frame features 10mm bolt-on spacing before ordering
• Pair installation – Requires two tensioners (left and right) for proper chain alignment
• Axle routing – Thread axle through both tensioners for secure rear wheel positioning
• Chain tension adjustment – Loosen/tighten bolts to adjust chain tension and rear wheel position

Important Notes

• Ships direct from manufacturer in USA; may ship separately from other orders
• Single-hole lollipop design prioritizes weight savings over maximum adjustability
• Pair required; order ensures you receive both left and right tensioners
• 10mm bolt-on compatible; not suitable for press-fit or other dropout styles
• Simple design ideal for riders prioritizing minimal weight and straightforward maintenance
• Tool-free adjustment speeds up chain tensioning during practice or competition
• Proven minimalist tensioner design used in professional BMX racing