Why spend all the money on a Thomson if you're going to be cutting it down anyway? Seems like a waste.
If your post is a 27.2 just hack it off, but leave at least 3 or 4" to go inside the frame. If you have a large-diameter post (like a 30.9) you might save a little more weight by using a shim and a stubby 27.2.
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Originally Posted by Mark Twain
"Don't argue with stupid people; they will drag you down to their level and then beat you with experience."