561 fork mounted.
Head & shoulders above the rest, holds the bike better, looks better, more aerodynamic, no contact with the frame so you don’t get nasty frame rub from dirt.
After using both of the above I’d never go back to a frame mounted rack.
Takes a little longer to mount as you have to remove your wheel, but it only takes a few minutes, if that.
Only downside is if your using a 15mm/20mm adaptor you can’t lock your bike on, but would you really leave your pride and joy on the roof of your car unattended? I certainly don’t!
Oh, the supplied 20mm adaptor is rubbish, I bought a Hurricane Fork Up on here, couldn’t be happier with the set up.
I also use a Thule wheel bag to keep the crap out my car and protect my wheel.
But that’s just my opinion.