To all of you out there running those TRP dual arm mechanical numbers, have them serviced. I had the misfortune today to have to fettle a pair fitted to a Norco cross bike. Less than 12 months old, it had already chewed its way thru a set of front pads, both cables (internal routing) were seized, and the pad adjusters were locked solid. Nothing for it but to strip both calipers, copious quantities of brake cleaner, WD and anti-seize. reassemble and fettle. New cables, use the linisher table to deglaze the pads, wire wool & brake cleaner to get the sh!te off the discs. Thank $deity the skog flushed out of the outer cables**. I wasn't up to trying to route new outer thru the frame, not today.
Fettling tip. Once you have the adjusters moving and you've cleaned the inside of the caliper, wind them in until there's a visible gap then fill the void behind the adjuster with aerosol anti-seize, then wind them back fully before coating the inside of the caliper. Then centre the caliper before fastening the cable.
**Who the fuck thought galvanised cables were a good idea on a cross bike? RRP ITRO of 1200 quid and the bloody thing uses the cheapest cables China can make!
At least it stops now...