For a relatively long time now I have been doing Bill Star 5x5 type routine.
Weight ~85kg with max bench 130kg, squat 160kgx5 but deadlift is low, I sometimes got sharp pain in my lower back when going to anything heavier than 100kg or 120kg. Recently, I have slightly widened my stance and my hands go inside (like sumo) and the pain is no longer there and it seems easier for me to keep my back straight.
I get the impression that it should be at least as high as the squat from what I see most others doing.
My grip also loosens very easily and my forearms are relatively weak. At the moment I drop 140kg. I am trying to work out whether I can overcome this or if I have an injury which makes it hurt when I deadlift. What is a good method for increasing grip strength if that is the problem? Or could it just be that my lifts are not in a coventional proportion?