Troy Lee D4 Carbon Helmet – The King of Helmets?

George has a long and happy history with Troy Lee helmets – will the D4 Carbon keep a smile on his face?

Being 6’ 6” limits your ability to test stuff. Test bikes are generally supplied in a medium or large, clothes the same; I am however becoming a bit of a specialist in helmets (which must be why my wife keeps referring to me as one?).