Odyssey thunderbolt cranksthe odyssey thunderbolt bmx crankset is the new and improved descendent of the twombolt it is still one of the most technically advanced crank designs on the market due to continued advancements in their legendary 41 thermal processing and heat treatment system fatigue life has been increased by a massive margin features laboratory tested and team proven updated open ended spindle cap new wedge cluster band with greater flexibility never wobble crank arm and spind