TLDR
Resin or semi metallic pads for riding around in Berkeley/El Cerrito/Richmond? Mostly a commuter, but there are hills on my commute and going fast is fun. I'm actually trying to eliminate squealing, and since I'm likely to be replacing pads and rotors, I would like to pick the right compound so that glazing/smoking the brakes is eliminated as variable. Other advice would also be welcome.
INTRO
I am getting back into cycling after a 10 year absence. I just got a Bombtrack Arise (SS gravel with mech disc) that I'm very pleased with. I weight 185lbs and the bike is about another 25. I'm very mechanically inclined though bikes haven't been my focus before.
*** There's a lot of hate for mech disc, and honestly I don't get it after riding these bottom of the barrel mechs for a bit. Please don't turn this into a thread about hydros are better. I'm sure they are, but they also cost a fortune to run as tt levers on bullhorns and would look hideous. ***
I'm trying to hunt down the cause and deal with squealing disc brakes. Unfortunately, I never really had a good baseline. I've had the bike for a week. I am currently using the Tekro Mira, Jagwrie Compressionless housings, and rotors that came with the bike. I felt like set up was pretty straight forward. I watched a bunch of youtube and bedded the resin pads with ~15 runs down a mild hill being sure not to come to a complete stop. The brakes feel good and perform well overall.
TROUBLE SHOOTING (so far)
The front rotor was warped right out of the box (+.010"). I initially I just set it up, but the after bedding in the pads the it just screamed. I sat down with my dial indicator and brought the rotor to +-.001" (yes I have a dial indicator and know how to use it). I then scrubbed down the rotor with alcohol and resurfaced the pads with 220 with lapped marble as a backer. Then I rinsed the pads with alcohol and was careful not to touch the pad surface. I ran through the full pad/caliper set up again and bedding again. I was able to achieve 2 clicks instead of 3 pad back off an 2 thin sheets of paper instead of 5 for my spacing without rub.
This got me much less annoying squeal that's now more of a chirp. The braking feel also now has a distinct catch/vibration to it also. These are both most pronounced during moderate braking, and quite under heavy braking.
My rears, which have been fine up until now, have also started to squeal under moderate braking, but it's not a chirp. They don't feel like they bite amazingly well. I suspect they are glazed, but I don't have enough experience to know if that's just normal since bikes have a heavy front braking bias.
BB7s
I have a set of new BB7s ready to go, but I was planning on riding the Miras around for a bit just to get to know them and be able to appreciate what the BB7s bring.
QUESTIONS
Resin or Semi Metallic? I don't mind grinding sounds, but I really don't like squealing. The resin pads that came with it were fine in terms of stopping power as far as I'm concerned, but I'm worried they may glaze too easily.
Should I just dump the Miras and switch to BB7s?
Is the issue that I have cheap rotors and pads?
Is it worth facing the post mounts right out the gate to remove this as variable?
Should I get a new rotor?
Is it worth moving to 180mm front rotor?
Should I care about MTB vs road rotors?
Really I just want to get back to riding and enjoy my new bike instead of drilling down into the minutia of disc brakes. Thanks for reading.