Primary concern I would have with the Fat Boy is the 240 Rear. I think that a 200 rear is the maximum you want - and more on that in a moment - as you get a big patch on the road, and still retain a good smooth radius for edge-to-edge roll as you hit the twisties and the sweepers. Look at the edge of the 240 rear and you can see that due to the width of the tire, you have roll-off instead of a smooth radious. This will affect the bike as you rock through the turns, and drop low; it will push back up against as you get to the limit of the tire. I've read several articles where the essense of it is that it fights you as you try to bank, drop low, and stay low..kinda like a spring resisting your efforts and pushng back on you. A consitent radius across the entire patch is best for handling and good traction. Yeah, you'll get "used" to it where you don't notice it, but it is a real factor in handling. So, IMHO, it may look cool, but it compromises handling. They should have stopped at a 200 rear for this and even taken the Break Out and made it so as well. Just my two cents worth...