GGC SMS Auto Parts Co Roof Rack Attachment

GGC SMS Auto Parts Co Roof Rack Attachments: Built to Carry Anything

GGC SMS Auto Parts Co — operating under the well-known Exposed Racks (EXR) brand — brings decades of American manufacturing heritage to the roof rack attachment category. Founded in 1946 by the Schafer family, the company has evolved from precision automotive machining into one of the most innovative names in roof-mounted cargo systems, with products proudly manufactured in Pennsylvania.

The EXR Click-In System: A Patented Attachment Approach

What sets GGC SMS Auto Parts Co apart in the roof rack attachment space is the patented EXR Click-In connector system. Traditional roof rack accessories rely on thumbscrew fasteners that can take a minute or more per mount to install or remove. The EXR Click-In connectors are engineered to get accessories on and off in seconds — a meaningful advantage for drivers who swap cargo configurations frequently between adventures.

The Click-In system is compatible with all EXR multifunction crossbars, including EXR tent racks, and works across a wide range of attachment types. With the right brackets in place, a single crossbar setup can transition between carrying paddle boards, surf boards, bikes, kayaks, skis, snowboards, rooftop tents, lumber, storage bins, awnings, canoes, fishing rods, and more.

Heavy-Duty Construction and Load Capacity

GGC SMS roof rack attachment hardware is built from heavy-duty carbon steel, acid washed, electroplated, and powder-coated for long-term durability and corrosion resistance. EXR crossbars are engineered to be so strong that the effective load limit is determined not by the bars themselves, but by the vehicle's own suspension and OEM-specified roof capacity. The company backs its products with a 3-year warranty — reflecting confidence in both materials and manufacturing.

Versatile Attachment Options

The EXR attachment lineup includes components for a variety of mounting needs:

• EXR Click-In Roof Top Tent Adapter Plates — including heavy-duty versions rated for 3–5 person rooftop tents, engineered to replace bulkier U-bolt approaches
• EXR 270 Awning Brackets — with adjustable height and depth to properly position large 270-degree awnings on EXR xBars, handling the cantilever loads common with oversized awnings in wind
• Universal Bolt-On U Brackets — providing flexible mounting points for miscellaneous roof accessories on the xBar profile
• 13 EXR Universal Mounting Brackets — designed to work within the Click-In ecosystem for fast swaps across different gear types

Because the entire accessory lineup is designed to work together mechanically and visually, builders of purpose-driven off-road rigs — particularly on platforms like the Jeep Wrangler, Jeep Gladiator, and Ford Bronco — benefit from a cohesive system without the fitment compromises that come from mixing universal aftermarket components.

A Legacy of American Innovation

SMS Auto Parts Co. also holds a patented no-drilling weight distribution system and invented soft-top roof racks designed to fit beneath a vehicle's soft top — a solution that addresses a longstanding gap in the market for open-top off-road vehicles. With products installed on over 50,000 vehicles across the United States and a commitment to precision machine welds and high-quality materials, GGC SMS continues to set a high bar in the roof rack attachment segment.