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Sonic Cargo Box

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  • Patented AeroNose Design reduces drag and noise making it the most aerodynamic box available.
  • Patented Rear-Angled Base and expanded vehicle mounting points help maximize trunk and hatch clearance.
  • AcuTight Mounting “clicks” when you reach optimal hold to ensure your box is secured to the rack.
  • SecureLock ensures that all gear is locked and box is properly closed prior to driving

  Alpine Medium Extra Large Extra Large
Volume (cu) 10 13 17 22
Length (in) 96 73 90 100.5
Width (in) 27.5 34.5 34.5 37.5
Height (in) 11 16 16 17
Weight (lb) 40 40 51 63
Mounting system Acu-Tight Acu-Tight Acu-Tight Acu-Tight
Box Opening Dual-Side Dual-Side Dual-Side Dual-Side
Central lock
Max Ski length (cm) 216 158 201 227
Fits Aero Profile
Fits Square Bar
SKU No 633S or 633B 634S or 634B 635S or 635B 636S or 636B