Devices and methods for reducing vehicle drag

A kit for retrofitting an existing vehicle trailer, a roof and a floor separated from each other by a pair of opposing walls that extend at least partially along the length of the floor, the roof, floor, and walls defining a space accessible by a trailer door, the roof having a front edge and a rear edge, the kit comprising:

• a rain gutter component defining a sloped surface extending between a leading edge and a trailing free edge, the rain gutter component configured to be positioned adjacent to the roof such that a portion of the rain gutter component proximate to or including the leading edge contacts the roof and the trailing free edge of the rain gutter component extends beyond the rear edge of the roof, the rain gutter component configured such that a distance of the sloped surface from the roof increases as the rain gutter component extends from the leading edge across a first portion of the roof and then decreases as the rain gutter extends towards the trailing free edge along a second portion of the roof,
• wherein the rain gutter component is configured to be non-movably attached to the trailer such that the portion of the rain gutter component contacting the roof is maintained in a fixed position relative to the roof.

A method of retrofitting a vehicle trailer, a roof and a floor separated from each other by a pair of opposing walls that extend at least partially along the length of the floor, the roof, floor, and walls defining a space accessible by a trailer door, the roof having a front edge and a rear edge, the method comprising:

• installing a rain gutter component on the vehicle trailer, the rain gutter component defining a sloped surface extending between a leading edge and a trailing free edge, the rain gutter component configured to be positioned adjacent to the roof such that a portion of the rain gutter component proximate to or including the leading edge contacts the roof and the trailing free edge of the rain gutter component extends beyond the rear edge of the roof, the rain gutter component configured such that a distance of the sloped surface from the roof increases as the rain gutter component extends from the leading edge across a first portion of the roof and then decreases as the rain gutter extends towards the trailing free edge along a second portion of the roof,
• wherein the rain gutter component is non-movably attached to the trailer such that the portion of the rain gutter component contacting the roof is maintained in a fixed position relative to the roof.