When I first got my Can Am Spyder it had 10,000 miles on it. A 2015 RT Roadster. The rear tire had been replaced which I plan to switch to a car tire but it has some tread left. I did notice the front tires needed balance. I purchased the beads and put in both front tires but did not notice much difference. Today I removed the tires from the wheels and found inside the tires seemed sticky not where anyone had put anything in them. The rubber was tacky and the beads just stuck in in the tires and where not doing anything. I replace the valve stems with new steel ones so I can use my Doran tire pressure monitoring system. I remounted them and took the tires to a tire automotive shop and they balance them. Did it ever make a difference. I did not realize they were out of balance that much. I just hope when I change my rear tire I can get it balance. I am not sure their machine will balance the rear. Does anyone know the exact diameter of the rear axle shaft? I need this to make a shaft for my tire changer to go through the rear wheel. Next spring I will replace all the tires with cars tires and put the belt tension er on. Is the belt tension er worth the money? I don't notice much vibration but it may be like the front tires maybe I get a little and don't notice it that much. Thanks for any replies.