Leitner Designs ACS ROOF For RSI Smart Cap 6-6 00-6.6TCR-1804

The ACS Roof Over Truck Cap Platform is a modular, heavy-duty rack system specifically engineered to fit the RSI SmartCap. Designed for off-road use, overland travel, and commercial utility, this USA-made aluminum platform mounts directly to your SmartCap’s factory-installed T-slot tracks using eight 8mm bolts. It’s the strongest and most versatile rack in its class—built to carry rooftop tents, gear, and accessories with confidence.

Key Features

• Zinc-Plated, Powder-Coated Steel Mounting Brackets

Laser-cut from 1/8" steel for exact fitment and flex-free performance.

• 6061 T6 Aluminum Extrusions

Custom aluminum bars offer over 2X the yield strength of typical rack systems.

• Sliding Load Bars

Fully adjustable for mounting rooftop tents, fuel packs, solar panels, and more.

• T-Slot Compatibility

Compatible with most Yakima and Thule accessories that mount via T-slot.

• Vehicle-Specific Fitment

Available in four part numbers to precisely fit all RSI SmartCap models from 5’ to 6’-1/2” bed lengths.

• Engineered for Direct Mounting to SmartCap Tracks

Mounts directly to the factory-installed tracks on your existing SmartCap T-slot system using eight 8mm bolts. The platform secures tightly into the pre-installed track nuts—no drilling, no fabrication required.

• Fast, Hassle-Free Installation

Install in under an hour with basic hand tools. All necessary hardware is included.

• Compact Flat-Pack Shipping

Ships in a single flat-pack box via UPS Ground.

Specifications

• Static Load Capacity: 1000 lbs

• On-Road Load Capacity: 500 lbs

• Off-Road Load Capacity: 300 lbs

• Weight: 45–56 lbs (depending on size)

• Material: 6061 T6 Aluminum

• Finish: Dual-stage Leitner powder coat

• Fasteners: Grade 10.9 Zi-Ni black coated

• Manufacturing: Designed, engineered, and made in the USA

The ACS ROOF was designed for the RSI Smart cap, however if your truck cap has an aluminum mounting rail it will most likely fit. Please check the dimensions below to make sure the rails your cap falls into the adjustment range of our rack.

Part # 00-GTCR-1801

Max rail width passenger to drivers’ side – 50”

Minimum aluminum rail length front to back – 38”

Part # 00-5.0MTCR-1802

Max rail width passenger to drivers’ side – 40”

Minimum aluminum rail length front to back – 38”

Part # 00-5.6TCR-1803

Max rail width passenger to drivers’ side – 48”

Minimum aluminum rail length front to back – 38”

Part # 00-6.6TCR-1804

Max rail width passenger to drivers’ side – 48”

Minimum aluminum rail length front to back – 44”

Designed for Overland Performance and Commercial Utility

Whether you're carrying a rooftop tent, hauling jobsite gear, or heading into the backcountry, the ACS Roof Platform delivers elite-level performance and modularity. It’s the ultimate upgrade for your SmartCap—trusted by overlanders, contractors, and fleet operators alike.

• Made in USA, 2 year warranty, Aluminum, Works with RSI Smartcap, Bolt in Installation