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Thomson seatpost again(4 posts)

Thomson seatpost againmike mcmahon
May 10, 2001 10:44 PM
I just received and mounted my new 27.2 x 330 Thomson seatpost in my back-up road bike. My previous post was a 250 Chorus. I know conventional wisdom is that I should use a hacksaw to cut off the excess length. However, does this do anything for me other than save a few grams? I'm using it on my heavy back-up/rain bike and grams aren't an issue. Do I lose or gain anything by having a lot of seat post inside the seat tube? In other words, is there any good reason to yank it out, cut it down, and reinstall it? I'm really feeling lazy right now and don't want to go through the hassle unless there's a valid reason to do it.
Don't cut itDuane Gran
May 11, 2001 8:07 AM
I think you already answered your own question, but if you need another reason to not cut it down to size, consider that someday you may want to put it on another bike or resell it. Both of these tasks will be easier if you don't cut it. That said, I'll admit that I cut my seatpost, but then it is on a racing bike and I'm a weight weenie.
re: Thomson seatpost againgrz mnky
May 11, 2001 12:56 PM
I cut mine down to get rid of the weight, but other reasons include not being able to lower it past the bottle cage/front der. bosses if someone shorter wants to ride the bike. Also, the extra area is just more potentional for corrosion and jaming in the tube - if your bike works this way - kinda ugly when you get all the zig zag marks from twisting it side to side when you pull it out. The scrap is sort of a cool keepsake since it's an oval bore. Keep it long if you want to have your options open. If you cut it be sure to remove the burr with a file. You may also want to make a new mark for minimum insertion since the old one will not be in the right place.
Thanksmike mcmahon
May 11, 2001 1:03 PM
I've decided on sticking with the full-length post. In the five years I've had the bike I've never loaned it out to anyone who needed to lower the post substantially and don't anticipate doing so in the future. The potential for corrosion is the one issue that has caused me to consider cutting it. My old steel frame has a considerable amount of rust and the old Chorus post had a bit of corrosion on it. Removing a corroded 330 Thomson may not be fun. I'll just have to be vigilant about removing and regreasing it on occasion.