Fitment-first comparison / Reviewed July 20, 2026
Roof Cargo Boxes fitment comparison
High-ticket, and a two-layer fitment problem: does the box fit your crossbars, and does it clear your rear hatch when open? Most boxes clamp to standard bars but still need compatible bars and enough roof length.
Universal clamp mount, but confirm two things: (1) crossbar shape/width and bar spread are compatible; (2) rear-hatch clearance when the hatch opens. Long boxes need front clearance greater than ~52 in. Crossbars are an extra cost if you don't already own them.
Thule Motion 3 XL
Approx. Motion 3 XL ~$1,149.95; Motion 3 L (16 cu ft) commonly ~$949
Fit: Universal clamp for Thule WingBar/AeroBlade/SquareBar/ProBar Evo and Xscape bars, plus most factory and aftermarket bars; T-track needs adapter 697-6.
Confirm before buying: Check rear-hatch clearance — the XL needs front clearance greater than ~52 in — and confirm you own compatible crossbars.
- ~18 cu ft, 165 lb capacity
- Dual-side opening, central locking
- PowerClick quick-mount with torque feedback
- Tool-light PowerClick mounting
- Dual-side access
- Wide crossbar compatibility
- Premium price
- Hatch clearance can rule it out on shorter roofs
- Crossbars extra if not owned
Opens the official Thule page in a new tab. Editorial link — verify price and fit there.
Source and market: Official Thule product page (United States), checked July 20, 2026.
Yakima SkyBox NX (LG)
Approx. ~$799 (often discounted)
Fit: Universal mount for Yakima StreamLine bars plus most factory, round, square, and aero bars. LG fits bar spreads ~24-36 in.
Confirm before buying: Confirm your bar spread falls in the ~24-36 in window and verify hatch clearance on your roof length.
- 16 cu ft, ~47 lb
- Dual-side opening, SKS locks included
- Flat floor, made in USA, limited lifetime warranty
- Lower price than comparable Thule
- Usable flat floor
- USA-made with lifetime warranty
- Requires compatible crossbars installed
- Bar-spread window must be checked
- Still needs hatch-clearance check
Opens the official Yakima page in a new tab. Editorial link — verify price and fit there.
Source and market: Official Yakima product page (United States), checked July 20, 2026.