I had to adjust the pads of my new Avid BB7s in cold dark weather.
When I took the pads out to examine them, the outside piston came out and would not go back in. I had to remove the other piston to get the thing back in, but not until I had to remove the lock ring wire from the post of the outside piston. Then I discovered that the pistons are not magnetized so I had to put the spring back on the pads replacing them both at the same time.
Well I got it all back together and it worked fine, but on the way to town I lost the inside piston adjustment red plastic knob! It cost me $10 to replace them!!!!
The owner’s manual that did not come with the brakes, so I did not know that I should press the knob back on until it clicked.
Do not trust what mechanics tell you, they are concerned only with job security when they tell you that this is a "good" brake. some even tell me that it is the best of the cable pull brakes. Just changing the pads in the summer, I had the spring that holds the pads apart, fly out and get lost!
Their web site has no way for the users to contact them.
ALL HYDRAULIC DISC BRAKES ARE SLUGGISH IN SUB FREEZING WEATHER?
TRP/RD hydraulic disc brakes. They have the master cylinder mounted to the caliper and are actuated by a cable. Making it easy to adjust the tension of the lever! But the pads are not held in-place with magnets.