Art No: PI648415 Steering Column Piaggio for Vespa GTS 250

Dear SIP

Is there any difference between Vespa GTS 250 year :2009 steering column compare to the current 300 GTS 2015 model ?

My current model 2009 fork diameter is 46cm and in the market currently (GTS range) is between 44-45cm


Can I check with you -Art No: PI648415 what is the diameter ?