Box One Chain Tensioner 10mm x 2 Axle Hole chainring it quickly proved itself on

it quickly proved itself on unpowered MTBs as well

feel and durability of a well-loved vintage piece

To ensure proper clamping force

we draped this all with BMX race-specific tread that transitions from a center band with a large contact patch to directional tactile knobbies on the sides

Compatible with both box one and box two 11 speed and prime 9 rear derailleurs

Box One Chain Tensioner 10mm x 2 Axle Hole chainring it quickly proved itself onBox 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