Thule 633B Sonic Alpine

Stylish and efficient, the Thule 633B Sonic Alpine Cargo Box will tote your gear while keeping your gas mileage in check.  The 633B is packed with convenient features and a deceptively roomy 11 cubic feet of storage space.  Now featuring AeroNose technology that creates the most aerodynamic cargo box in its class.

**This item has been discontinued and is no longer available for purchase.  Click here to be redirected to our complete selection of Cargo Boxes**




  • 11 cubic feet of storage capacity
  • Hi-gloss Black finish
  • Dual-side opening and external lift handles provide convenient loading from either side of vehicle
  • Thule AeroNose technology increases fuel-efficiency while reducing noise
  • Mounting with the patented AcuTight fit ensures optimal fit and assembly by clicking when the box is tight enough
  • Oversized SecureLock system ensures that the cargo box is closed and secured during transport
  • Attaches to all Thule, Yakima, and Whispbar and most factory rack systems with included
  • Exterior Dimensions: 96" x 27.5" x 11"
  • Interior Length: 87" or 221cm
  • Maximum Ski Length: 216cm

Also available in a Glossy Silver Finish - Thule 633S Sonic Alpine Cargo Box
NOTE: Cargo boxes must be shipped "Freight Carrier". Please allow up to 2 weeks for delivery


Write Your Own Review

You're reviewing: Thule 633B Sonic Alpine

How do you rate this product? *

 1 star2 stars3 stars4 stars5 stars
Ease of Installation
Quality / Durability
Overall Value