This is a bit off topic: but how did you end up with 2 aluminum bicycles? You are obviously having problems riding on aluminum and yet you have two rides made of the same type of material. You don't like riding them, but selling is not an option - Whuh?!? Maybe you just like the way they look or maybe you're a weight weenie? Just curious.

Anyway, I hope our suggestions above like help to smooth the ride out (a bit)