TheBOX One chain tensionersare extruded then CNC-machined from 7075 aluminum for an optimal balance of strength and weight.

• Two axle hole design
• Sold in pairs
• Stainless steel hardware
• Laser-etched graphics that include wheel position guides and two 10mm mounting holes with 15mm of adjustment to ensure perfect adjustability
• Fits most frames every time you remove and replace your wheel