If it’s of any use, I’ve been running the TRP Spyres since they came out in the UK – think I had one of the first sets in (Dom sent them sans packaging as they were the last part of the Tripster build and I was desperate to get out on it!)
They’ve been superb. Quiet, a piece of the proverbial to set up and very easy to live with too. Having run BB5s on my original alloy Tripster, the very fact that the Spyres move both pads is the single biggest improvement.
They take a Deore style pad, so lots of aftermarket options are available. Alignment and any minimal tweaking is pretty intuitive and simpler than the red dial on the Avids. In use, they’re powerful enough to lock up with very short lever travel (using mine with 6700 STIs) but give good, predictable braking through the travel. I suspect decent quality full length outer cable makes a difference too.
Pad wear has been more than acceptable and even – especially compared to the Avids and the rotors are very light and attractive. I’d have to say they’re one of the best bits of kit I’ve put on a bike.