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, including laser-etched graphics with 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.

Axle:3/8″ (10mm)
Material: Aluminum
Hardware: Stainless Steel
Color: Black