Description: This is a brand new replacement magneto flywheel roller. Higher and stable friction coefficient. Better wear resistance and sufficient heat dissipation. Small dimensions and light weight,easy to adjust and repair. Fitment: for 50cc 90cc 110cc 125cc Trail Bike Dirt Bike Quad Bike Mini Bike Go Kart ATV Specification: Material: Metal Outer Diameter: Approx. 110 mm / 4.3 inch Height: Approx.60 mm / 2.4 inch Package Includes: 1 Piece Magneto Flywheel Note: Please allow slightly difference due to manual measurement. Color may be slightly different from the pictures because of different screen and light. Please kindly understand