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Maximum Crossbar Spread Permissible to Mount Thule Ascent 1500 Roof Box, Part # TH603


What is the maximum distance for crossbars to mount the Thule Ascent 603 1500 Roof Box,


Expert Reply:

This particular Thule Ascent Cargo Box, part # TH603, is discontinued and is no longer available. My contact at Thule advises that the maximum crossbar spread to mount this box is 33-1/2 inches and that this box used the QuickGrip mounting system.

We do offer replacement QuickGrip mounts if you need these. The QuickGrip assembly is part # TH05738; and the replacement mounting screw is part # TH05728.

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