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Old 11-22-09, 12:16 PM   #1
BikeLikeMad
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seatpost problem

bought a new saddle and I'm not sure where exactly to position it on my seat-post. another thing is that how high should I keep my seat-post for optimal performance. last thing is that I want to buy a suspension seat-post,what will be the best option under 30$ , any suggestion on how to measure the size?
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Old 11-22-09, 12:20 PM   #2
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What kind of bike and saddle ? Knowing will really help to narrow it down, keep it simpler.
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Old 11-22-09, 12:31 PM   #3
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What kind of bike and saddle ? Knowing will really help to narrow it down, keep it simpler.
what do u mean
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Old 11-22-09, 12:40 PM   #4
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Use the search function. There are a lot of tips on how high to mount seat. Also check out the Sheldon Brown site.
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Old 11-22-09, 12:45 PM   #5
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What kind of bike and saddle ? Knowing will really help to narrow it down, keep it simpler.
It doesn't matter what it is.
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Old 11-22-09, 01:42 PM   #6
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Here is one i can sell you,only had it on my bike for 2 days,include a shim to fit a 27.2 seat tube.

http://www.tamer.mrpbike.com/product...item=weekender

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Old 11-22-09, 01:44 PM   #7
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Here is one i can sell you,only had it on my bike for 2 days.
Lets not even bother ascertaining if it's the correct size.
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Old 11-22-09, 05:33 PM   #8
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Ooops,sorry,it's 25.4 mm OD.priced to sell,i am too light in weight to appreciate the effect of the seat post.As
for saddle position in the OP,i used the " knee aligned with the pedal axis'' method,still, i had to readjusted few more times until i felt right.
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Old 11-22-09, 05:59 PM   #9
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My method for getting a good fit:

Height: Pedal with your heels on the pedals (works well to have someone hold the the front whil you pedal backwards). You want the seat high enough so your knees lockout, but not so high that you have to rock your hips to reach at the bottom of the stroke. Adjust from there.

Fore/aft: The KOPS (knee-over-pedal-spindle) method. Do a search for it.
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Old 11-22-09, 07:10 PM   #10
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My advice for adjusting saddle height: go on a long ride with an allen wrench, adjust the seat higher and higher until it stops feeling good.

fore/aft: same thing.
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Old 11-22-09, 08:12 PM   #11
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My advice for adjusting saddle height: go on a long ride with an allen wrench, adjust the seat higher and higher until it stops feeling good.

fore/aft: same thing.
+1 I do this as well. I get close, then go on a ride with my multitool/allen wrench.
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Old 11-22-09, 08:53 PM   #12
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The easiest way, if you haven't taken off your old saddle is to take two measurements.

Measure from the BB to the top of the seat, make your new one the same.
Measure from the center of the cap on top of the fork to where the seat starts to jut out - where most folks' sit bones naturally sit - and make the new one the same.

Then go on a ride with an allen wrench like all the other guys (or gals) say.
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Old 11-23-09, 11:36 AM   #13
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thanks for all the feed back, i would still like to know how to position the seat. what i mean exactly is left or right. there are markers with measurements on them on the rods that attach to the seatpost. another thing i would like to know is that what difference does it make on my riding capabilities. one more thing, whats BB?

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Old 11-23-09, 02:37 PM   #14
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BB = Bottom Bracket, the center of which (the axle) is a common end point for certain measurements of the frame/bike (such as center of BB to top of seat tube or saddle rails, etc.).

I'm unclear what you mean regarding "left or right" in relation to the markers on the saddle rails ("rods"). The markers are there to help set the fore/aft (front/back) position of the saddle. When you say "left or right" are you looking at the bike from the side?
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Old 11-24-09, 07:53 AM   #15
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yeah i am
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Old 11-24-09, 07:56 AM   #16
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thanks everyone for all the help, i think ive got it right now. The last thing I would like to know is where can i get a good suspension seatpost online, under 30$ near the UAE (United Arab Emirates) which is in the middle east adjacent to Saudi Arabia
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Old 11-24-09, 09:06 AM   #17
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.......

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Old 11-24-09, 11:33 AM   #18
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Your choices are limited by your seatpost size.
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Old 11-24-09, 08:50 PM   #19
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can someone please tell me how to measure seatpost size...

Last edited by BikeLikeMad; 11-25-09 at 06:41 AM.
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Old 11-25-09, 06:42 AM   #20
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Old 11-25-09, 07:50 AM   #21
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Best, if you can, is to remove the old post and read it off of there. Assuming it's a reasonably new bike, it should be stamped on there somewhere. it is likely twenty something point something. You need to get it right within 0.2mm accuracy if you measure it, so you can understand how it's much better to read it :-)
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Old 11-25-09, 08:54 AM   #22
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And if you don't see the marking, just place the open end of the tube on a ruler to get the measurement in mm,make sure the seat post is perpendicular to the ruler,look at the one i have for sell in the earlier post,better to get one in your country bcz the shipping may not be cheap from the states.
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Old 11-25-09, 09:36 AM   #23
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Quote:
Originally Posted by KungPaoSchwinn View Post
And if you don't see the marking, just place the open end of the tube on a ruler to get the measurement in mm,make sure the seat post is perpendicular to the ruler,look at the one i have for sell in the earlier post,better to get one in your country bcz the shipping may not be cheap from the states.
Ugh, this is terrible advice. Given the tiny increments of size in which seatposts are sold, a ruler will be all but worthless in determining seatpost size (unless you happen to have one of the newer oversized posts which tend to come in larger increments, and even then it's only mildly useful). 0.2mm [.008"] is an impossibly small variation to be read with a ruler. Some type of precision measuring instrument must be used if the seatpost size is not marked on the post.
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Old 11-25-09, 12:37 PM   #24
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thanks everyone ive got it. it was stamped on the seat post near the bottom. its 27.2mm
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Old 11-25-09, 12:37 PM   #25
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Ugh, this is terrible advice. Given the tiny increments of size in which seatposts are sold, a ruler will be all but worthless
Not really,i have done it with ruler and precison steel dial caliper which can measure down to the 1/1000 of an inch and both came out very close,a nother alternative is to
use a adjustable wrench to get the OD of the seat tube and lay it on the ruler.it works just fine.
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