The level of stupidity on this forum never fails to impress me. The straight line speed of a tire (130 on H rated) is only one of four quadrants a tire is responsible for, and the one least related to contact patch size.
A tire's capability is measured on a quadrant of acceleration/deceleration on one axis, and left/right lateral movement on the others. The points plotted on this quadrant represent friction (or grip, as we racecar drivers call it). Friction is very specific. Each tire has a maximum friction limit dictated by factors such as rubber compound, tread pattern, sidewall stiffness, and size of the contact patch of the tire.
As the tire has a maximum friction limit, it important to understand the uses of friction, as it pertains to car dynamics. Friction used for acceleration, turning, and braking all reduce the current available maximum friction of the car. Friction currently being used for braking cannot be used for turning, and so forth.
By reducing the width of one tire on the car, you are reducing the contact patch, thereby reducing the amount of friction available to that corner of the car. As speed increases, the amount of friction needed to keep the weight of the car on the road also increases. A smaller contact patch on one corner of the car upsets the grip dynamics of the car, and this effect compounds with speed.
So while you may be able to accelerate to 110mph relatively easily, should you need to utilize additional friction for turning or braking, you're going to get into trouble. Do you really think VW would pay to have 50mph stickers made and affixed to spares if there wasn't a compelling reason? Don't you think they'd advertise a full-size, full-speed spare if they could?
Stop doing stupid shit. You're driving up insurance rates on the rest of us.