The brakes are Tektro SU 20. And on the floating pad mount itself it says "SRII Floating Modulation"

The spring is in a little bracket that the pad mounts to. It is not in the noodle. A very odd set up. I just put some of the salmon "Thinline" pads on. It seems like an improvement although I still can't lock 'em up not that that is all important. I will report back after I have had a chance to test them in foul weather.