The 2-piston brakes on the Biktrix were not meeting my expectations. They were also real load on very low speed braking, like walking the bike down a steep hill. I decided I needed an upgrade so I bought so I bought Zoom 4-piston brakes off Amazon. I ended up just using the calipers. The tube ends were a bit different so I have to do some work there. I bled them and went for a road test. After breaking them in, they improved stopping power significantly.
