Originally Posted by
Gresp15C
Just adding a minor note: I've got a Shimano skewer right here, where the grippy part on the cam side is aluminum.
Yep, and perfectly fine with vertical dropouts, but most definitely would not be my choice for horizontal dropouts.
As I posted earlier, low-hold-strength QR skewers are an adaptation made possible by vertical dropouts, and sadly folks seem to have forgotten why they have limitations.