Knowledgebase: Bike Carrier FAQs
What's the difference between a swan neck and a bolt on towball?
Posted by Charlotte @ The Roof Box Company on 17 June 2010 03:51 PM

There are two types of tow ball - 'bolt on' (sometimes known as "two bolt flange") and 'swan neck' (which includes detachable tow balls).

A 'bolt on' tow ball - fixed with 2 bolts to a mounting plate: 

A 'swan neck' tow ball  - it just appears from under the bumper:

Be warned that some makes of cycle carrier only fit to one type of tow ball or the other. The Maxx Raxx bike carriers only fit bolt on tow balls but most others (E.g. Atera Strada / Buzz Racks)  fit over the ball so they fit all tow balls. See the product pages for more information.

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