Seat post issues

I was wondering if anyone in the group can give me some suggestions on
how to adjust the seat on my Trek 4500. The dang thing keeps going
down every time I ride it and it is really annoying to stop my ride
just to adjust the height of my seat. I think keeps going down
because of my weight (230 pounds at the moment).

I have already tried tightening the clamp that holds the seat post in
place, but that didn't solve my problem. Tonight, when riding, I
pulled the seat out and it looked like some form of lubrication was on
the seat post.

Should I spray the seat post with WD 40 to remove the original
lubricant? Should I even try adding another seat post lower on the
frame to have 2 holding the seat in?

Thanks in advance for any suggestions.

Filip Kowalski wrote:
I was wondering if anyone in the group can give me some suggestions on
how to adjust the seat on my Trek 4500. The dang thing keeps going
down every time I ride it and it is really annoying to stop my ride
just to adjust the height of my seat. I think keeps going down
because of my weight (230 pounds at the moment).

I have already tried tightening the clamp that holds the seat post in
place, but that didn't solve my problem. Tonight, when riding, I
pulled the seat out and it looked like some form of lubrication was on
the seat post.

Should I spray the seat post with WD 40 to remove the original
lubricant? Should I even try adding another seat post lower on the
frame to have 2 holding the seat in?

Thanks in advance for any suggestions.

You can try wiping the post so it's "dry", but that can lead to its own
problems later on (seizing mainly).

You can also try filing the slot a little bit, so the clamp can tighten
more.

If it were me, I'd probably "rough up" the post a little, so it's less
slippery where it enters the frame.

Also, a blinkie light bracket can help keep a post from slipping down, as
can a hose clamp if you wanna get medieval on its ass. eg

If all else fails go to a bike shop and let them take a look.

Bill S.

"Filip Kowalski" wrote in message
...
I was wondering if anyone in the group can give me some suggestions on
how to adjust the seat on my Trek 4500. The dang thing keeps going
down every time I ride it and it is really annoying to stop my ride
just to adjust the height of my seat. I think keeps going down
because of my weight (230 pounds at the moment).

I have already tried tightening the clamp that holds the seat post in
place, but that didn't solve my problem. Tonight, when riding, I
pulled the seat out and it looked like some form of lubrication was on
the seat post.

Should I spray the seat post with WD 40 to remove the original
lubricant? Should I even try adding another seat post lower on the
frame to have 2 holding the seat in?

Thanks in advance for any suggestions.



Sidewalk chalk or fine sand

"TBF::." wrote in message
...

"Filip Kowalski" wrote in
message ...
I was wondering if anyone in the group can give me some suggestions on
how to adjust the seat on my Trek 4500. The dang thing keeps going
down every time I ride it and it is really annoying to stop my ride
just to adjust the height of my seat. I think keeps going down
because of my weight (230 pounds at the moment).

I have already tried tightening the clamp that holds the seat post in
place, but that didn't solve my problem. Tonight, when riding, I
pulled the seat out and it looked like some form of lubrication was on
the seat post.

Should I spray the seat post with WD 40 to remove the original
lubricant? Should I even try adding another seat post lower on the
frame to have 2 holding the seat in?

Thanks in advance for any suggestions.



Sidewalk chalk or fine sand


yep. "rough" it up with a little dirt...

"Filip Kowalski" wrote in message
...

I was wondering if anyone in the group can give me some suggestions on
how to adjust the seat on my Trek 4500. The dang thing keeps going
down every time I ride it and it is really annoying to stop my ride
just to adjust the height of my seat.

Some people have had luck with a shim made from an aluminum can.

Filip Kowalski wrote:
I was wondering if anyone in the group can give me some suggestions on
how to adjust the seat on my Trek 4500. The dang thing keeps going
down every time I ride it and it is really annoying to stop my ride
just to adjust the height of my seat. I think keeps going down
because of my weight (230 pounds at the moment).

I have already tried tightening the clamp that holds the seat post in
place, but that didn't solve my problem. Tonight, when riding, I
pulled the seat out and it looked like some form of lubrication was on
the seat post.

Should I spray the seat post with WD 40 to remove the original
lubricant? Should I even try adding another seat post lower on the
frame to have 2 holding the seat in?

Thanks in advance for any suggestions.


Just wipe the seatpost off with a rag and try it again. Sometimes too
much lubricant can be a bad thing and there's probably plenty enough
left in the seat tube to be sufficient.

JD

Tighten the QR a little. That don't work shim the post.
Shim made from a Coke,Pepsi,or ever beer can.

"Filip Kowalski" wrote in message
...
I was wondering if anyone in the group can give me some suggestions on
how to adjust the seat on my Trek 4500. The dang thing keeps going
down every time I ride it and it is really annoying to stop my ride
just to adjust the height of my seat. I think keeps going down
because of my weight (230 pounds at the moment).

I have already tried tightening the clamp that holds the seat post in
place, but that didn't solve my problem. Tonight, when riding, I
pulled the seat out and it looked like some form of lubrication was on
the seat post.

Should I spray the seat post with WD 40 to remove the original
lubricant? Should I even try adding another seat post lower on the
frame to have 2 holding the seat in?

Thanks in advance for any suggestions.


GREASE IS GOOD

http://sheldonbrown.com/stuck-seatposts.html

http://www.jensonusa.com/store/produ...at+Collar.aspx

--
DTW .../\.../\.../\...

I've spent most of my money on mountain biking and windsurfing.
The rest, I've just wasted.

On Fri, 26 Aug 2005 16:59:42 -0400, wrote:

Tighten the QR a little. That don't work shim the post.
Shim made from a Coke,Pepsi,or ever beer can.

I am hesitant to tighten the quick release too much because I broke
one several years ago on a brand new bike because the seat post kept
slipping down. Sad thing is, I weighed 180 back then, now I am up to
230 with the same dang problem.

I have seen multiple recommendations for a shim, and I may go that
route, after wiping the excess gunk off of the seat post fails to
correct the problem at hand.

Thanks for all of the recommendations.

Filip Kowalski wrote:

I was wondering if anyone in the group can give me some suggestions on
how to adjust the seat on my Trek 4500. The dang thing keeps going
down every time I ride it and it is really annoying to stop my ride
just to adjust the height of my seat. I think keeps going down
because of my weight (230 pounds at the moment).

I have already tried tightening the clamp that holds the seat post in
place, but that didn't solve my problem. Tonight, when riding, I
pulled the seat out and it looked like some form of lubrication was on
the seat post.

Should I spray the seat post with WD 40 to remove the original
lubricant? Should I even try adding another seat post lower on the
frame to have 2 holding the seat in?

Thanks in advance for any suggestions.

See if you can get your hands on a micrometer and measure the actual
outside diameter of the seat post. It's not uncommon for them to be
well under "spec" (and of course, sometimes the wrong one gets bought
/ used somewhere along the line for other reasons).

The other thing is to make sure that there is no undue friction on the
pivot on the quick release lever. Some should be lubricated, some
shouldn't - but if there's much friction, what feels "tight" will
actually just be the effort involved overcoming the friction, rather
than actually tightening down the clamp.

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $795 ti frame