Hey all, looking for some assistance with front brake setup. Just about done building my new frameset, but having issue with front brake caliper.
So when I setup the triangle pully thing that attaches to the cable, and I have the caliper arms kind of in their default all the way out position, things work OK. But if I then use the small outside allen screws to try to adjust the arms in towards the rim to get them close enough for good braking, the caliper rollers seem to lay on the triangle uneven, and the cable pulls it up at an angle, causing only one arm to move properly.
Even if I try to adjust both caliper arms the same amount, the right one (looking at it from the front) doesn't get moved properly from the triangle movement.
Clear as mud??? Anyone advice? I could try to post a video of it if that would help...
Had this issue for a while and it drove me crazy. Did a bit of analysis and realized its due to how the cable enters the brake area at an angle. If your issue was the same as mine (am a mechanical engineer, kinda embarrassed to say it took me this long to figure it out), the remedy is to pre-bend the cable coming into the calipers slightly to stop the cable from trying to spring itself to one side. Basically, the metal cable is acting like a spring and the result is that it tends to apply a force onto one of the calipers when its in the default position. Just bend the cable a bit to allow it to sit neutrally when you let the brakes go. This should prevent the calipers from getting stuck. I think this is more apparent for the low stems, as the angle of the brake cables that are exiting the cockpit are at a more extreme angle.
I am having a bit of similar issues with the rear brake caliper. I think the same remedy might fix that as well. It's just the inherent issue with caliper brakes. But once you use some pliers to bend the brake cable a bit it should reset fully.