I have a 2015 Spyder RT. This Spring I replaced the tires with car tires. I have put about 6,000 miles on these tires. The Rear with General Altimax and the front with Federal AZ01 tires. I removed the wheels and mounted the tires myself. I have a local tire dealer that has a new late model tire balancer. He could balance the front tires but could not balance the rear tire. I purchased from Lamonster Garage a set of centrimatic wheel balancers. I had always used these on my Gold Wing’s and really liked them. When I got them I put the one on the rear wheel but at that time I did not put the front ones on because the Spyder was real smooth. At that time I installed Bajaron Sway Bar and Doc’s vibration damper. Lamonster Garage had sent me a 32 oz. bottle of AmerSeal. Being I am leaving for Sturgis next Sunday today I decided to put the AmerSeal in my tires. I put as close as I could 10 oz’s in rear and 7 oz’s in each front tires. I also decided to remove the weights from my front wheels and put the centrimatic balancer’s on the front. When I did this I marked where and what weights were on each wheel. After putting in the AmerSeal and installing the centrimatic balancer’s I when for a ride. My front fenders, windshield vibrated and shook terrible. It really worried me not knowing if it was the AmerSeal or tire balance. I could not leave it that way. I pulled the front wheels off replaced the same weight where they were and removed the centrimatic balancers. I took it for another ride and it smooth right out. I could not believe it. The first ride I tried to run it up to 80 miles an hour but it shook too much. Second ride I ran it up to 100 mile an hour and it was pretty smooth. I don’t know if the tires were too much out of balance for the centrimatic balancer’s. One tire had 3- ½ oz with a ¼ oz weight. The other tire had 3-1/4 oz weights. Evidently the AmerSeal did not have any effect because I have it in the tires. I just cannot believe the centrimatic balancer’s did not work better. Has anyone else had this problem?