Dr. Beebenson, PhD HA, ST, Offset (hons)
Adults are eligible to become employed.Single piston when you look at them from the side (internet shot)
Yes they are dual and the other 6120/7120/8120/9120 are quad.
I have a few sets of them... fekkin quad (dual) pads are a bit more $$$ that the dual (single).
Gets exxy when you have 3 adults scrubbing them off on 6-7 bikes.