Avon makes great oversized tires. They are well rounded and are great when wet or damp. I'm sure you have heard already but large, wide tires handle like sh!t when turning / carving mountain roads. Have a chopper with a 300mm rear tire and it will go very fast in a straight line but turns like a train. It has a 2032cc or 124 cu in engine and is purpose buit to go straight quickly. I would NEVER go wider on my 1700 v max. It handles perfectly with the tire it has. A 240 or 300 rear tire would not keep the tire from going up in smoke through the first (3) gears anyway. 15-20 psi and throttle control may. 1700 vmax is one of (5) of my bikes I currently own and have owned over (35) bikes in my lifetime. It is my favorite unless I am going on a long trip. Only complaint is 80 miles to a tank full. A (3) gallon fuel bladder in my passenger seat bag cures that minor problem though.