www.d2moto has 8mm (listed as 3" ATV Wheel Spacers Kawasaki Suzuki Yamaha SKU: WSS004) on sale for $19.99. They are the screw on type. I am adding these to the rear wheels of my daughters Hanma 110cc Utility ATV. I have used these in the past for years without any issues on a 110cc. I have recently been searching for another pair and happen to stumble across these.