Front Runner Cargo Box 60L

This 60L aluminum cargo box mounts to the Slimline II or works standalone — a genuinely weatherproof hard-shell at 13.2 lbs. Here's the thing: it's one of the few cargo boxes that integrates directly into a modular rack system rather than sitting on top of crossbars. The downside? It's sized for the Front Runner ecosystem first, so standalone use feels like an afterthought.