I believe that larger number is with the winglets.

Douglas W. Johnson,

Hi All,

I've been seeing online that the wing span advertised for the IV is 35'5"... however my wing span is 33' (tip to tip of the wing span -- i have the wing tips).  I measured with the tape pulled pretty tight and this is the width I would require to fit through a door.  I am wondering where the 35'5" comes from... were there some options with the wing as it was built?  

-Dico