TRP Spyre Adjustment
 

I have the Spyre-C on my Salsa Fargo. Generally happy with them for where and how I ride.

I’m using a second wheelset for the winter and have new Sram rotors installed. When installing the wheels the pads rubbed (different hubs) so I backed out the pads by loosening the adjustment bolts on either side of the caliper. I then set them in so they just don’t rub. Hubs seem pretty straight/true. The lever is close to touching the bar when I brake. Wasn’t before. And it’s the back brake doing this, front is good. Maybe I should have loosened the barrel adjuster and not the adjustment dials?

What’s the best way to reset things so I get just enough pad clearance and decent brake lever action?

My guess is you aren't as close with one pad as you think. The barrel adjuster just moves both pads instead of doing it individually.

I'm inexperienced with disc's, but it appears a simple recentering of the caliper is what you need.
About the 2:30 mark- Loosen the two 5mm hex bolts slightly, squeeze brake lever & hold while retightening.

That’s how I tried to centre the pads initially when I put on the second wheelset. I still had rub so I then adjusted each side separately until the rub on that side just stopped. I believe this is more of an issue with how much I’ve used those side adjustments vs the cable pull via barrel adjuster (I ended up playing with both as I tried to solve the lever hitting the bar, and now can’t remember all the fiddling I did).

Maybe the rotor is out of true?

I know this is not the answer your asked for, I had the same problem with TRP Spyres and replacing them with cable actuated hydraulic calipers (Juin Tech R1) helped a lot. Left and right pads in hydraulic calipers can extend by a slightly different amount, effectively self-adjusting for the rotor position. Also the stopping power is better.

Another problem I had with TRP Spyres was the loosening of the adjusters. Applying purple Loctite instead of blue helped with this.

My bicycle came with the Spyre brakes. I picked up my custom bicycle in march of 2014. There was a recall on them that came out March 06 2014. I ordered in TRP HY/RD brakes while I was waiting for the Spyre replacement. The front HY/RD caliper failed when I was slowing for a red light at faster than 35 mph. TRP was fast with a replacement. By the time another front caliper failed the Spyre replacements had arrived. I put on the Spyres and used them for a couple of months. The Spyres weren't as good at stopping as the HY/RDs when they were working. I replaced the Spyre calipers with Paul Klampers.

The Paul Klampers are nice of course, but expensive here in Canada ($350-$375 each). And our dollar stinks right now so I don’t see that coming down anytime soon.

The Spyre are perfect stopping power where and how I ride, it’s just the ease of adjustment I don’t like.

and the rotors are new and true!

I just need to play with them a bit more to figure it out with these wheels (last 10 months was no adjustment needed).

Maybe you could shim one rotor a hair?
I have the Spyre also on my DIY tour bike with track ends. I just leave a big gap, it's no problem for instant stops.
My adjustment screw is locked tight, like most are I think.
I have a SA drum brake in front, both levers are set to grab tight at half lever pull.

that’s the thing, I don’t have big gaps between rotor and pad, rotors true, but the lever is nearly touching the bar when I’m grabbing brake. Which is why I asked about the cable and barrel adjuster.