Quinn

I'd like to trade my 175 cranks for your 170/172.5 cranks.

Mine:
-Ultegra 6600 (10spd, 1st gen) dark grey 175mm 130bcd. Fair condition, not immaculate. No chainrings.
-Race Face Turbine LP, square taper, 5 arm, red ano. Might include 34T ring. These are in so-so condition, but for they are a classic. If you're wondering how they could be worth a shimano road crank then, well, follow this link... https://c2.staticflickr.com/2/1379/971687887_accd063c9c_b.jpg . Mine are a lot uglier, but still, they're pretty sweet.
-Ultegra 6500 cranks (9 spd), 175mm, with Dura Ace Octa-Link BB.

Wanted:
-Shimano hollowtech II MTB cranks, 170mm, prefer double or single ring spider.
-Track cranks, 170 or shorter, square taper.
-Shimano hollow tech II road cranks. 170 or perhaps 172.5. Bcd not critical (130 or 110).