My squats are definitely held back by my back being weaker than my quads/glutes. I also get a lot more nervous with weight on my back than I do just pulling, so I'm more likely to go heavier with a DL than I am with a squat because I train alone and never have a spotter. I'm also just finding that I really, really like to deadlift. If I do a leg press, though, I can get those numbers way further up. Just doesn't translate to the squat as much as I'd like. Oh well, safety first!
That's funny, I'd think that people who did better in DL than squat had significantly more strength in upper body than people who had it the other way around. I do understand your line of reasoning though but somehow I just find squats more manageable than (especially conventional) squats. Maybe it's because I have relative short arms? I don't know.
But MF is right it's just as much a question of psyche as it is strength. I still won't go heavy (well really heavy) because of mental barriers. But if I could let go of them, I think I could have a max at around 120 kg, maybe 130 kg. Same thing with bench. Body-building/strength training isn't just about pumping lol.
Make use of the safety bars if you do your squatting in a rack, they're invaluable for those of us that train alone. They have saved me many times, just make sure you set them to the right height to catch the bar if you get stuck at the bottom
So do you just adjust them to where your deepest low in a squat position is? And how would you technically get out of that pickle? Would you just let it roll over your head onto the safety bars at the sides? Or..? I think this piece of information might encourage me to go heavier and maybe get through some of the mental barriers that are currently inhibiting me from lifting what I'd like to be lifting by now.