When the original is folded down how high will it fit into a garage ? What is the highest high way speed I can tow my boat with top up ?

Hello, Here is a link for the approximate measurements for the Original folded Ttop. It really just depends on your boat and setup. https://fishmaster.com/pub/media/fishmaster/pdf/t-top-folding-drawing.pdf We recommend, when trailering any of our t-tops, to have them in the upright position and to not exceed recommended highway speeds. Extensive, frequent travel will cause wear to the top over time if canvas is not removed. Please consider removing the canvas for longer trips.