I still have not had a single problem with the Spyre on my tandem nor on my unis, great brakes overall.
I am suprrised that TRP decided to redesign all of the Spyre brakes after a single carbon arm brake failure, that demonstrates a very progressive attitude and suggests a strong commitment to the consumer.
Good vibes to TRP/TEktro!
Tektro is second tier, TRP is first tier. You'll find the same sort of thing when you buy a car, same make, high and low level products.TRP is Tektro, and my experience with Tektro, though not with every product they make has always led me to consider them second tier.