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Sooner Frontier

The Sooner 6'8" wide Frontier gooseneck models were designed with the western crowd in mind. These 3 and 4 horse trailers boast a tough exterior, complete with an extruded nose rail and "Echelon" slat that wraps around the rear of the trailer to help protect against the abuse of the road. Also featuring LED lights, a fully carpeted rear tack, and an impressively strong floor system, these trailers are built for the long haul.


Body Style:

Bumper Pull

Load Type:

Slant Load

Trailer Width


Horse Stalls

SEL 318 = 3 horses, SEL 422 = 4 Horses

Stall Width:

40 inches

Dressing Room Size:

4' Shortwall

Inside Height:


Exterior Sides:

.063 White aluminum skin

Rear Doors:

50/50 rivetless rear doors w/Legacy Echelon (C) slat, four 8" aluminum hinges, two 18" x 24" windows and two halogen load lights.

Side Unload Door:

Side unload door at first stall w/three 8" hinges, one 15" x 24" window, one padded breast bar and one pressure latch w/ locking keyed hasps


Premium, hand-built feed doors w/ 15" x 24" windows and fold down bars on streetside; 18" x 24" w/ screen on curbside

Tack Area:

Carpeted rear tack area featuring a collapsible, double lined rear tack wall with six bridle/halder hooks, removable saddle rack and one LED light


Two (2) 5,200 lbs rubber torsion axles with electric brakes

Landing Gear:

Single Drop-leg jack

Stall Dividers:

Framed stall dividers with stall pads and patented slam latch

Tie Rings:


7 Year limited warranty

One inside and one outside tie ring per horse

Additional Features


Single piece aluminum roof

Floor Mats:

Lifetime rubber floor mat in horse area


Heavy-duty, crrugated aluminum interlocking floor; aluminum frame w/ 4" I-beams on 13" centers


Five radial tires on 16" steel wheels (includes spare)

Dressing Room Features:

Carpeted dressing room with pitchfork style blanket bar, one brush tray and six bridle/halter hooks

Hitch Safety:

Adjustable 2 5/16" kingpin coupler, breakaway switch with battery, and safety chains with slip hooks

Gravel Guard:


camper door with sliding window and screen

Horse Area Walls:

Rubber on Walls:

Kick Plate:

Roof Vents:

One pop-up two-way aluminum roof vent per stall

Floor Plan

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