Box Chain Tensioner

Box One™ Chain Tensioners are extruded then CNC-machined from 7075 aluminum for an optimal balance of strength and weight. A minimalist design adds style while reducing their overall mass. Laser-etched graphics 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.

When used correctly, Box One tensioners will protect your frame dropouts and hold your rear wheel in place. Keep in mind. However, they aren’t indestructible (neither are your dropouts). Install these lightweight chain tensioners with care

Not compatible with chain guards. These must be removed to install aftermarket chain adjusters.

Compatible with OEM drum brake. If you have a disc brake conversion this will fit but the slide adjuster will not work on the disc side due to fitment in the dropout.

Not compatible with chain guards. These must be removed to install aftermarket chain adjusters.