I am at the point of ordering a seatpost (thomson). I see that the bike is spec'd with a setback post, is this necessary because of the geometry or something, or would a straight post be ok on this frame? Thanks
It's just a fit thing. Setback seatpost just moves your weight backwards a bit. It's all a function of toptube length, seatpost geometry and stem length. From a technical point of view, sure you can run a straight post. From a fit point of view - that's a big "it depends".
Thomson found that by bending the post and using a zero offset seat clamp, it makes the overall package a little lighter than usinng a strait post and heavier offset clamp. My own measurements on my bikes show no difference in rider position.
My own measurements on my bikes show no difference in rider position.
OIC - that took me a minute to figure out. You mean no difference between the Thomson setback design and "conventional" setback designs, right? Thought for a second you meant straight fs. setback and i was like "Whatchu talkin' 'bout, Willis?".
I mean the strait post (specialized) with offset clamp that came on my Epic. Compared to the Thomson masterpiece setback post that I put on it. There is no difference in rider position. I did the upgrade for the weight savings and the somewhat neater look.