Description: Top quality aftermarket ATV Chain Roller Tensioner Heavy duty chain idler guide wheel with upgraded torsion spring Spring loaded tensioner automatically adjusting tension towards chain elongation Chain idler fits many Dirt Trail Bike, Quad, Mini Moto, ATV, Chopper, etc. Smooth rotoring and longer life; Easy to install Specification: Longest Stretch: 35mm (1-3/8 inch) Height: 89mm (3-1/2 inch) Placement on Vehicle: Rear Square Tube: 23-32mm (7/8-1-1/4 inch) Material: Iron & Plastic Package Includes: 1 Piece Chain Roller Tensioner Note: Please allow 1~3mm differs due to manual measurement. (1 inch = 25.4mm) Product color may vary slightly from what appears online due to monitor differences