Originally Posted by
Maximo
the Blue head has the 17.6 mm stroke where the gold head has the 16.8 stroke...The Blue head also has the 17011 bearing and as you said the tungsten slugged crank
So, a little more bottom grunt? Better front bearing, and better crank. The specs on the web page say's the same stroke between the two, but I'll take your word on it over the web page listing. Are they both 14.5 cranks?