Tektro MD-C550 Dual-Piston Cable Actuated Mechanical Flat Mount Disc Caliper for

Purchased from Kyle's Bikes and they were very prompt with shipping and received this brake unit 5 days earlier than estimated. But the product appears to be defective from Manufacturer (not seller's fault as the box and item appear undamaged). The outer arm was visually not moving like brake piston like the other side. I have another pair of these and was able to tell the difference. So be careful to inspect it if you buy it. The brake itself (if not defective) works fine on the bike. Will return these and order another one with crossed fingers. These are comparable to the more expensive TRP Spyre. The TRP Spyre has a rubber boot to prevent dirt on cables and a bolt to hold the brake pads instead of the cotter pin. Functionally they are equivalent.