It really came down to price, By the time SSS factored in shipping it was the same number as the Nu Airs. I found another company that sold what I think is the SSS tire but the guy was dicken me around on the price and shipping so I beat up McLaren to get the number I could like with. Thats how I ended up with Mclaren The ride really is that good. Amazing really. I will say that they tear the heck out of grass. The tread is like 2" deep and when you spin on grass its just like a rototiller. I may order the wider Nu Airs to put on the 465 and keep the 12X16.5 for using tracks and on the 440 when the VTS is not on it.