Side Beam Flange Reinforcing refers to pieces of steel bar welded at an angle from underneath the outer top flange of to the web of each side beam of the trailer deck. Its purpose is to minimize the deformation of the top outside flange that happens over time as wide machinery is loaded on the trailer.

The Sloped Rear Extension (sometimes called a Dove Tail) is a sloped extension on the rear frame of a trailer to allow equipment to be loaded over the rear of the trailer - with or without the use of rear ramps. Most all ROGERS fixed gooseneck and tag-along trailers include a Sloped Rear Extension. A Sloped Rear Extension is also available as an option on certain ROGERS detachable gooseneck models and is used for loading when it is not convenient to detach the gooseneck for the front loading of equipment.

The Sloper is a trailer deck style that gradually slopes upward from behind the gooseneck to the trailer's rear frame. This design provides an extra long usable loading area with easy access to the load space over the rear frame. The Sloper is particularly useful to paving customers who wish to haul multiple machines at a time. Trailers with this deck style have also been used many times for customers to haul railroad construction equipment because of its gradual load angle and extra long available deck length. The Sloper is available with all ROGERS Ultima Series detachable gooseneck trailers from 35 to 50 ton capacities.

A Spare Tire Carrier can be installed on the top or side of a gooseneck or drawbar to hold a spare tire in place.

The Spread Axle "East Coast" is a spread axle assembly is a removable framework coupled to removable axle(s). The spread axle may use mechanical air or hydraulics to provide load transfer. The Spread Axle "East Coast" uses shims and the suspension system to distribute the weight evenly across the axles. The Spread Axle "East Coast" increases the wheel base of the trailer when attached to the rear frame. The Spread Axle "East Coast" is used in heavy hauling situations where stringent "overweight" regulations and specific axle loads are critical.

The Spread Axle "West Coast" is a spread axle assembly is a removable framework coupled to removable axle(s). The Spread Axle "West Coast" may use mechanical air or hydraulics to provide load transfer. The axles of the main trailer are attached to an interior rocker beam, that "floats" between the splice beams of the trailer. Weight equalization of Spread Axle "West Coast" is superior to the "East Coast" style, but the cost is significantly more. The Spread Axle "West Coast" increases the wheel base of the trailer when attached to the rear frame. The Spread Axle "West Coast" is used in heavy hauling situations where stringent "overweight" regulations and specific axle loads are critical.

Spring and Walking Beam Suspension is a severe-duty choice for many 3 and 4-axle trailers. The combination of two rubber-bushed walking beams connected by a heavy spring has a "walking" action with increased load stability and positive axle alignment. Spring and Walking Beam Suspension is available in 75,000 lb. and 90,000 lb. capacities for 3-axle trailers; 100,000 lb. and 120,000 lb. capacities for 4-axle trailers. The axle spacing is set at 50".

Spring Brakes, also called Maxi Brakes, have two chambers - one that acts the same as a standard brake chamber, and a second chamber that contains a very powerful mechanical spring that acts as a fail-safe should the air brake system lost air pressure. The Spring Brake also serves as a mechanical parking brake to prevent a trailer from rolling when parked on inclined surfaces.

Spring Suspension is a choice for many 2 and 3-axle trailers. Spring Suspensions are available in two, four- and six-spring designs. The axle spacing is set at 50".

A trailer specifically designed to permanently carry an electric substation (transformer) unit. Additional features such as hydraulic landing legs and electrical grounding components are often incorporated into this type of trailer.