Hi all, I'm looking to buy an SRAM Red GXP chainset, 50/34 configuration, crank arm size I want ideally to be 172.5 but can get away with 175mm too. Not bothered if there's a few scratches here or there, as long as it isn't battered and has plenty of life left in the rings.

I currently own a Red GXP standard double 53/39 with 175mm crank arms so could also arrange to swap if you're looking from moving away from a compact.