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Question about raising/lowering saddle

Old 06-18-05, 04:00 PM
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Question about raising/lowering saddle

I'm on a new Trek 3900 and I'm quite new to cycling. The bike is about 10 days old, 73 miles. I've tried adjusting the saddle position up and down, but when I complete a 5-10 mile ride, the saddle is all the way down again. The quick release piece is VERY tight, almost impossible to loosen by hand, although I do. And it is VERY hard to tighten by hand once I find the position I want, but somehow I get it closed again. Then I ride, and when I'm finished i notice the seat is once again all the way down.

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Old 06-18-05, 04:08 PM
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Is there any grease on the seatpost? It might be worth a try to wipe the seatpost clean, just to be sure. Also, is the quick release positioned correctly at the top of the seat tube? It seems very strange that the quick release is that tight and yet the seat post is losing height...

Since the bike is so new, you could have your bike shop take a look for you if there is nothing obvious that you can see.
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Old 06-18-05, 04:13 PM
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Originally Posted by shoerhino
Is there any grease on the seatpost? It might be worth a try to wipe the seatpost clean, just to be sure. Also, is the quick release positioned correctly at the top of the seat tube? It seems very strange that the quick release is that tight and yet the seat post is losing height...

Since the bike is so new, you could have your bike shop take a look for you if there is nothing obvious that you can see.
The post should be greased.The post might be the wrong size.
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Old 06-18-05, 04:16 PM
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why grease the seat post?- I have noticed that new bikes come with grease on the seat post but it seems counter intuitive particularly where the post is slipping
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Old 06-18-05, 04:19 PM
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Originally Posted by sydney
The post should be greased.
I was just thinking the same thing. Quick release seat post clamps are often quite painful. The post on my Klein used to slip when I first got it. More grease on the seatpost solved the issue, though I keep meaning to buy a non-quick release clamp anyway.
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Old 06-18-05, 04:19 PM
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Originally Posted by royalflash
why grease the seat post?
Without grease, the post will freeze inside the frame (due to the dissimilar metals).....then you'll never be able to adjust it.
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Old 06-18-05, 04:25 PM
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Originally Posted by BillK
Without grease, the post will freeze inside the frame (due to the dissimilar metals).....then you'll never be able to adjust it.
That could be good.
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Old 06-18-05, 05:54 PM
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Since it's a new bike, have the bike shop check the inside diameter of the seat tube with a micrometer, as well as the seatpost diameter. It's always possible it got assembled with the wrong post.
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