Lewis Hamilton is the first driver to clinch the title wearing a Bell helmet after Jenson Button in 2009. In Button’s case he shifted to Arai after clinching the title while Hamilton shifted from Arai before clinching the title.
Kimi Raikkonen is the last driver to have won a title wearing Schuberth helmet. The ten years from 2005 to 2015 have seen 8 titles for drivers wearing Arai helmets (2005 & 2006 – Fernando Alonso, 2008 – Lewis Hamilton, 2010-2013 – Sebastian Vettel, 2014 – Lewis Hamilton), 1 title for a Schuberth driver (2007 – Kimi Raikkonen), and 2 titles for Bell drivers (2009 – Jenson Button and 2015 – Lewis Hamilton).
Now I’m not sure of this – need to find out – but is Lewis Hamilton the first driver to win the F1 title with an American helmet brand on American soil? It sure is a great marketing opportunity for Bell!