Senior Member (Retired)
Park brake toe-in tool
I sprung for a few Park tools while here in the colonies. They included the tool that is used to adjust the toe-in on brake calipers. Only after I bought it did I think about what it is supposed to do. Which is essentially to torque (oh yeah, I also bought the TW-2 torque wrench ) the caliper so that it is, well, toed-in, to eliminate squeal.
But aren't these bits made of alloy that doesn't take to being torqued without fracturing? What am I missing? [I have Campa Centaur brakes.]
The slight amount of twist you put on the brake arm will not weaken the aluminum. About a 1/16th of an inch (sorry I don't know metric) is the most you'll ever do.
That tool is not really meant for high end road brakes. It is (or at least we only use it in the shop I work at) for chintzy steel sidepulls on department store bikes. If you've tried to move the brake pads themselves and you are still experiencing squeal, you can probably bend the arms a bit. But be carefull, and don't bend them do to much. As you were guessing it isn't too amazing for the aluminum. I would try new b-pads before attempting to bend them though.