Two weeks ago, I had a conversation with Harry Farkhan, who is a tech at Ride-On. My auto formula would not distribute in my newly installed front tires. I had no issues with the auto formula in my Vredestein fronts. He was VERY EXPLICIT to use the MOTORCYCLE formula with all three wheel motorcycles. This includes Spyders, Rykers, H-D Tri-Glide and Polaris Slingshot. And yes, this includes car tires. The motorcycle forumal is more viscous. He also states to use the motorcycle dosage charge. For the Spyders, that is 9 oz for each front tire. Ride-On does NOT leave a mess with tire removal. The product remains in the lower tread area, and is not flung around.