my left shoulder a lit bit numb after change handlebar according to bike fitting
Recently I made bike fitting by shimano bike fitting system.my shoulder width is 400mm,my original bike handlebar width is 420 ,so everytime I cycle over 40km-200km,when I got home or on the last tens of km my shoulder is numb.but after change to 400mm handlebar ,it's a little better,but only left shoulder is a little numb.
so I just want to know it's because the handlebar angle or shift lever angle problem or I should use 380mm handlebar?