Originally Posted by
Road Fan
diameter should be 27.2 mm. The length should be around 250 mm or so.
I can see not liking the aesthetics of a Thomson, but it you need setback, your knees pretty much require it, but it doesn't have to be a Thomson of course!
I don't think I need a setback post. My seat is pushed forward pretty far right now, though I haven't really looked much at KOPS since I haven't ridden the bike long and hard yet.