Truck Roof Rails Installation - Step One: Positioning the Rails

Roof rails give your truck a mounting point for accessories like cargo carriers and tent tops. Included end caps allow for easy insertion of roof accessories and a silicone weather-tight gasket prevents scratching and leaking. Roof rails with included end caps are 63¼ inches.
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[@590studio]

Preferably do not use the topper's brake light as it may not be centered. LEER recesses theirs (like the one in this video) but ATC/Jason/Ranch, and perhaps others surface mount theirs. My Jason is 1/2" off center. Whatever manufacturer, check it for equal distance. Best to find center by measuring from either the top of the side windows or the lower edge of the topper's skirt. Although the window heights could be inconsistent too. I recommend double measuring from both locations. This is the best video out there and the only one that mentions the reinforced roof area. This is very, very important and structurally the absolute best place for attachment. Outside the reinforced area is thinner fiberglass. Cheers Garage Smart!

[@user-nq3te8ri9f]

How can I figure out if I should install it inside or outside of the reinforcement plate? I don't know what shell I have.

[@SpudFarmer]

What Leer topper is this?