GOOFIT Driving Wheel Roller Weight Set for Honda Helix CN250 Elite CH250 Baja Roketa Hammerhead Water-cooled 250cc ATV Go Kart Scooter Inner diameter: 11.9mm,Height: 23.9mm Diameter: 23.9mm,Weight: 24.5g Fit for Honda Helix CN250 Elite CH250 Baja Roketa Hammerhead Water-cooled 250cc ATV Go Kart Scooter Set of 6 Reminder/Note:To ensure you purchase the correct product,please read the product description carefully or image size.thanks for your attention.if you have any issues or need any help,welcome to contact with us before or after your purchase.we will do our best to help you solve it