LEER 100R Commercial Cap – Heavy-Duty Work Truck Topper
The LEER 100R is a commercial-grade truck cap engineered for contractors, fleet operators, and trades professionals who demand secure, weather-tight cargo protection every day. Its one-piece fiberglass shell delivers superior strength-to-weight performance compared to aluminum alternatives, resisting dents and corrosion season after season.
We designed the 100R with frameless, flush-mount glass that sits flush with the shell’s exterior—eliminating the rain channels and exterior trim that collect dirt and ice on older work caps. Rotary-latch side doors lock independently, giving you fast access to tools and materials without opening the rear hatch. The entire cap installs over your existing bed rails using heavy-duty C-clamps, maintaining full bed access when you need to remove it for oversized loads.
- One-piece fiberglass shell with gel-coat finish for impact and UV resistance
- Frameless flush-mount side glass—no exterior channels to trap debris
- Dual rotary-latch side doors with three-point locking and weather stripping
- Reinforced rear hatch with integrated handle and keyed lock cylinder
- Heavy-duty aluminum C-clamp mounting system—no drilling required
Fiberglass Shell Construction & Finish Options
The 100R shell starts as a single-piece fiberglass molding reinforced with marine-grade resin—the same layup process LEER uses across their entire lineup. This construction method eliminates the seams and rivets found on aluminum caps, so water and road salt can’t creep into joints and cause rust or delamination.
We apply a UV-stabilized gel coat over the entire exterior before the paint stage. This gel coat layer absorbs minor scratches and prevents the underlying fiberglass from chalking or fading, even in high-altitude sun exposure. You can order the 100R in any of 16 factory-matched colors—paint is baked on in a controlled booth to ensure consistent gloss and adhesion. If you plan to have the cap painted locally to match a custom truck color, we offer a white primer finish that gives body shops a clean base for their topcoat.
Side Door Access & Locking Hardware
Each 100R cap ships with two lift-up side doors—one per side—mounted on stainless steel piano hinges that run the full width of the opening. The doors use a three-point rotary latch system: one handle on the exterior twists to engage pins at the top, middle, and bottom of the frame. All three pins must seat fully before the weather stripping compresses, so you’ll know immediately if a door isn’t secured.
The latch cylinders accept the same key as your rear hatch, and we include two keys with every cap. If you manage a fleet and need all vehicles keyed alike, our dealers can order cylinders from LEER that match your existing key code. The stripping itself is a bulb-style EPDM gasket that compresses evenly around the entire door perimeter—it won’t harden or crack in freezing temperatures the way older foam tape does.
Mounting System & Bed Rail Compatibility
C-Clamp Installation
The 100R mounts using eight heavy-duty aluminum C-clamps—four per side—that grip your truck’s bed rails from above and below. Each clamp tightens with a single bolt, so you can install or remove the entire cap in under 20 minutes with just a socket wrench. No drilling into the bed means you preserve your truck’s factory warranty and resale value.
The clamp design accommodates most OEM bed rail profiles, including Ford’s aluminum rails and GM’s CornerStep bumpers. If your truck has an aftermarket bed liner, you may need to trim the liner’s upper flange slightly so the clamp’s lower jaw seats flush—our installation manual includes measurements for common spray-in and drop-in liners.
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LEER 100R Buyer Questions
Yes, the 100R mounts over most spray-in liners without modification. The C-clamps grip the bed rails above the liner, so the liner’s thickness doesn’t affect installation. If your liner extends over the top edge of the bed rail, you may need to trim it back slightly so the clamp’s lower jaw seats flush. Our dealers can verify fitment for Line-X, Rhino Linings, and other popular brands before you order.
The 100R is compatible with most fifth-wheel and gooseneck hitches as long as the hitch’s mounting rails sit below the bed floor. You’ll need to ensure the cap’s front bulkhead clears the hitch head when it’s raised—most hitches require 2-3 inches of clearance. If you have an above-bed gooseneck ball, you can install the cap and simply remove the ball when towing.
A standard 6.5-foot 100R cap weighs approximately 180 pounds, and an 8-foot model weighs around 210 pounds. This weight counts toward your truck’s total payload capacity, so you’ll need to subtract it from your door-jamb sticker rating. For comparison, aluminum caps of the same size typically weigh 150-175 pounds, so the fiberglass adds 30-40 pounds in exchange for superior impact resistance.
Yes, LEER keeps key-code records for every cap sold through authorized dealers. If you lose your keys, contact the dealer who installed your cap with your vehicle’s VIN or the cap’s serial number (stamped on the front bulkhead). They can order replacement keys cut to your lock cylinders’ code. Most dealers stock common key blanks and can cut replacements on-site within a few days.
The 100R mounts directly to your bed rails using C-clamps, so it will install over most low-profile tonneau tracks without interference. If you have a Retrax or BakFlip track system that sits above the bed rail, you’ll need to remove those tracks before installing the cap. The cap’s base gasket needs full contact with the bed rail to seal properly, so raised tracks will prevent a weather-tight fit.
Yes, the primer-finish 100R is designed for professional paint shops or experienced DIY painters. The gel-coat surface is already sanded and primed, so you can apply automotive basecoat and clearcoat directly. Most body shops recommend wet-sanding the primer with 400-grit paper, then applying 2-3 coats of color and 2 coats of clear. If you’re matching a metallic or pearl factory color, have your shop use a spectrophotometer to mix the exact shade rather than relying on paint-code charts.
LEER backs the 100R with a limited lifetime warranty on the fiberglass shell against cracks, delamination, and manufacturing defects. Hardware components—hinges, latches, and clamps—carry a three-year warranty from the date of purchase. The warranty requires installation by an authorized LEER dealer and does not cover damage from accidents, improper mounting, or aftermarket modifications. Paint finish is warranted for one year against fading or peeling under normal use.