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Will carbon seatpost help, if only 2" of seatpost showing?(12 posts)

Will carbon seatpost help, if only 2" of seatpost showing?Eug
Jul 8, 2002 7:48 PM
Hi. I'm an out-of-shape mountain biker who just bought a Trek 2000. It's aluminum, with an alloy seatpost and carbon fork. Not a bad deal for about US$970, but as expected, it feels very harsh to me, coming from my Marzocchi & Thudbuster endowed cromoly mountain bike. (I was going to go steel for the road bike, but couldn't find a cheap steel bike around here that would fit me.)

With the bike I've got I've only got about 2 inches of seatpost (not including clamp) showing above the collar. With so little seatpost exposed, would a carbon seatpost make any significant difference to my butt? I can see having 4 inches showing would give the post room to bend, but with <2 inches it would still be extremely stiff, no?

In the meantime I'm going to get a new seat, but I'm wondering if it's worth splurging for the new seatpost.

P.S. Does anyone run a low-travel suspension seat post on their road bike (for casual training, not racing)?
won't make a damn bit of difference (nm)Jekyll
Jul 8, 2002 8:05 PM
You won't like this, your frame is to big! nm.Juanmoretime
Jul 9, 2002 1:42 AM
How do you know?TJeanloz
Jul 9, 2002 3:58 AM
The bike could be perfectly fit with 2" of seatpost showing, particularly if the rider is long torsoed and prefers a more upright position (as many Mountain bikers do).
Yeah, I was thinking that but 54" fits better than 52"Eug
Jul 9, 2002 5:01 AM
Yeah, considering the seat was so low I was also wondering if the frame was too big, but 2 different stores fit me with the same size frame on Treks. Plus, not that it means anything, but the Trek specs indicate that the bike is meant for riders with a height of 67 inches, which is exactly my height. I tried a 52" frame but felt a little bit cramped. Perhaps 53" would have been ideal, but they don't exist.

In any case I did some more riding and ended up raising the seat about another half inch.
Trek's 54" GeometryEug
Jul 9, 2002 5:16 AM
P.S. I'm 5'7" with 31+" inseam and about a 1" standover with my shoes on.

The 54" Trek geometry has a 30.3" standover and a 54.8 eff. top tube as compared to their 52 cm which has a 29.7" standover and 53.2 cm top tube.

They recommend a 5'7" person for the 54, and a 5'6" person for the 52 cm frame.

Strangely enough, for the Trek 2200, they recommend a 5'8" person for the 54 cm frame, although they still recommend a 5'6" person for the 52 cm frame.

So, like I said earlier, if a 53 cm frame had existed, I might have preferred that.
Oops that should be 54 cm not 54" (nm)Eug
Jul 9, 2002 5:17 AM
maybe so, but the CF seatpost will still make no difference (nm)ColnagoFE
Jul 9, 2002 6:17 AM
re: Will carbon seatpost help, if only 2&quot; of seatpost showing?pa rider
Jul 9, 2002 4:34 AM
Hi EUG. I had an 1995 old Raleigh bike three years ago that I ran a suspension seatpost on. It was the USE one everybody uses for mtb. Your having only 2" of seatpost will not be high enough for most suspension seatpost. You could aways try you thudbuster on your bike to see if it helps and will help prove my point. If your diameter is 27.2 for both bikes and size of seatpost.

You could aways get a cheap carbon seatpost, from supergo, for $60 to try out. Titanium seatpost also help damper road vibration. My buddy weighs 240+ lbs and that the post he got because of his weight to help with his c-dale bike.

Just giving you some options.

re: Will carbon seatpost help, if only 2&quot; of seatpost showiEug
Jul 9, 2002 5:06 AM
Yeah, the thud is too big, although, I do have a little more than 2", now that I've readjusted after more riding.

I'll look around.
re: Will carbon seatpost help, if only 2&quot; of seatpost showing?clintb
Jul 9, 2002 7:33 PM

If you're looking for a carbon seatpost to bend, you may be looking for the wrong thing. Carbon is typically used to dampen the buzziness that is inherent in aluminum. 2in is fairly short so I don't know if that'll even do much. You may be better off looking into 700x25 tires if you don't already have them.
the Trek 2K is a fairly harsh frameJohnG
Jul 11, 2002 5:42 AM
Run you tires slightly lower while you get used to the feel. It's a good "starter" bike so don't get discouraged.

good luck