Here's the deal, I installed some Avid SD7 brakes on my karate monkey and the front brake is squealing enough to scare the wildlife out of the woods.
Here's what I have done so far:
1. installed per instructions, pads parallel to rim. result: squealing, loud squealing.
2. toed the pads in a little. result: same squealing
3. took wheel out, inspected pads. looked like uneven wear. sanded the pads a little and re-aligned parallel to rims, made sure the whole pad contacts the rim. result: same squealing.
4. searched the mtbr.com forums for "brake squeal" and found several posts of similar issues with a variety of solutions. toe the pads out, set them parallel, yada yada. none of which seem to work.
5. uninstalled the SD7, installed a known good XT front brake. did all the same different setups, it squeals, too.
When I pull the lever hard it feels like the front pulses a little, i can see and feel the fork flex ( fore and aft), then the squeal kicks in. if i pull the lever lightly and roll the bike i can make a constant squeal.
also, the rear brake has a similar pulse feel but no squeal. both rims are fairly new and true.
here is the setup:
avid single digit 7 calipers
shimano xt v levers
rigid surly karate monkey fork
black wtb dual duty rim on surly disc hub
wtb nanoraptor tires ( i am pretty sure this has nothing to do with vibration from tires )
based off my research i think it has to be the rims. not sure how to fix it short of, well, new rims.
anyone have similar issues or know what I should try next?
the wildlife thanks you in advance.
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