Ok well the first time my tire went flat i was going over 100 and then my back started to feel a little loose. When i pulled over it was completely flat you could push down on the top. If you haven't gone over 100 on a flat then don't talk shit. I personally will plug everytime. I would be out what like 500 bucks right now for 2 flat tires ive had in the first 2 monthes of owning my bike.