444 Series · Structural Backbone The Beam That Carries Four The Four Bike Rack Main Beam is the structural backbone of the iSi 444-Series four-bike carrier system. This is the beam assembly only, with all hardware included. Your existing wheel cradles, frame supports and pivot base connect directly to it. Available in Compact or Extended lengths with a 25° departure clearance angle. Australian Steel 25° Departure Angle Hardware Included Lifetime Warranty What You're Ordering Beam Assembly Only This is the main beam component for replacement or standalone purchase. It includes all beam-specific hardware. Mounting bases, cradles and frame supports are ordered separately or transferred from your existing carrier. Included Four-bike main beam assembly (25° departure) Tee-Handles and grub screws All beam-specific mounting hardware Not Included Vehicle mounting base (pivot base or drawbar mount) Wheel support cradles Frame support cradles Stadium-Style Layout Four Bikes. Minimum Length. Bikes are staggered vertically along the beam in a stadium-style layout. This manages hub-to-hub clearance and results in the most compact four-bike carrier profile on the market, minimising rear overhang. Single-Piece Structure No Joints. No Compromise. The main beam is a single-piece structural member manufactured from Australian high-strength steel plate and tubing. There are no bolted joints, no split points and no welds in the primary load path. The textured powder coat finish protects against UV, stone chips and saltwater for the life of the product. Stadium-style staggering for compact overall length Clear working field for loading without handlebar overlap Tool-free connection to pivot base via pivot pins Compatible with all 442 and 444 Series components Choose Your Length Compact Or Extended Both lengths use the same 25° departure clearance. Choose based on your vehicle's rear clearance and bike handlebar/saddle spacing requirements. 750mm CompactFor vehicles with no rear offset. Tighter to the vehicle for minimum overhang. 850mm ExtendedFor vehicles with a spare tyre, rear bar, or where additional handlebar offset is needed. Looking For A Complete Carrier? If you need a full four-bike carrier system (beam cradles supports mount), check out the Bike Racks for Vehicles page to configure a complete setup. Compatibility Compatible with all current 442 and 444 Series iSi components. Not compatible with pre-2013 ED-Extreme Duty systems. If you're unsure, contact our team with your existing carrier model and we'll confirm. Lifetime Warranty 25° Departure Angle Made In Melbourne 30 Day Returns Replacing a beam or expanding your system? Let us know your existing carrier setup and we'll confirm the correct beam length for your vehicle and configuration. Speak to a Sales Engineer
