I got to 220kg 5reps x 5 sets without using straps, I don't have big hands.
the last couple of rep's my grip started to give way but I just reset my grip and carried on eventually my grip improved and I could finish the set, when I could do this I would increase the weight, towards the end of my heydays the increments would be smaller.
as with the bent over row the weight that I pulled never bothered me and my back actually fatigued before my hands anyway my hands never really made a tight grip on the bar, they where more like hooks my shoulder and upper back was doing all the work here.
if you put it into context, straps like lifting shoes aren't really making you stronger they just enable one to add weight to the bar, which really begs the question is that wise?