What is the stock Project X even flow shaft that is offered with the 818 hybrids ? When I go to order the only stiffness option is stiff (S). However I thought P-X shafts were numbered for stiffness. Is it a 5.5, 6.0, or 6.5?
There appears to be only one option for this shaft (although I assume you can custom order others). Curious which it is.
Thanks