Can Yakima SkyBox NX 18 Rooftop Cargo Box Fit Round and Aero Crossbars
Updated 12/09/2025 | Published 11/19/2025
Question:
etrailer lists this as compatible with round bars but the Yakima factory site lists it as compatible with StremLine or aerodynamic bars. Is that a typo here or an oversight on the Yakima site? Is it really compatible with round bars? I am looking to use it sometimes with a 2008 Nissan Frontier but also at times with a 2019 nuCamp TAG XL Boondock trailer that has a roof rack with Yakima round bars.
asked by: John E
Expert Reply:
Hey John, the Yakima SkyBox NX 18 Rooftop Cargo Box # Y45AV that you referenced is compatible with round bars and aero shaped bars. The mounting hardware can clamp on to either bar shape and work really well. I attached a picture down below that shows what the clamp looks like.
(click to enlarge)
(click to enlarge)
Product Page this Question was Asked From
Yakima SkyBox NX 18 Rooftop Cargo Box - 18 cu ft - Black Nano-Texture
- Roof Box
- Aero Bars
- Factory Bars
- Round Bars
- Square Bars
- Extra Long Length
- High Profile
- Extra Large Capacity
- Dual Side Access
- Black
- Yakima
more information >
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Jameson C.
12/8/2025
Hey John, how did the SkyBox NX 18 end up working with the round bars on your TAG XL Boondock trailer? It’d be great to know if the clamps held securely on both your setups. Your feedback could help others using similar Yakima racks.