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Slipping seatpost on my Kestrel(11 posts)

Slipping seatpost on my KestrelFat Jeff
Jan 23, 2002 12:29 PM
I have a Kestrel 200 that's about 5 years old. Recently the American Classic seatpost has began to sink into the frame within minutes of riding. It has always been this way, but not to this extent. I'm what you'd call a "Super Clydesdale" at 290+lbs so regular fixes may not apply. Like I said it has always slipped a bit, but now it's a constant issue...can't even make it through one showing of Chainsmoke 2 (my favorite trainer distraction) without having to stop and raise it.

Any ideas would be appreciated...

Fat Jeff
Some stuff other people say works...cory
Jan 23, 2002 12:36 PM
There was a long thread about this a few months ago. Can't vouch for any of this from personal experience, but...
Make sure it's tight (bet you already thought of that).
Make sure the bolt hasn't stretched (sometimes they do; a new bolt cured my only slipping post).
Make sure the post is the right size (probably a non-issue, in a five year old bike).
Degrease the post and seat tube (they claim that if you loosen the bolt occasionally and remove or spin the post, an ungreased post won't stick. I wonder about the effects on the bolt, though--would all that action weaken it?)
If that doesn't work, use a thin layer of valve-grinding compound (auto parts store) or a liquid cleanser (the faintly gritty stuff) on the post.
re: Slipping seatpost on my KestrelChen2
Jan 23, 2002 12:49 PM
Have you talked to anyone at Kestrel about it? I'd think twice about putting any kind of chemicals in contact with carbon fiber.
re: Slipping seatpost on my Kestrelpmf1
Jan 23, 2002 1:26 PM
I've had a 200 Sci for 8 years with no problem.

If I were you, I'd contact Kestrel and see about getting a new seat collar and binder bolt. They still make this bike (let me guess, its red). Might be that the old one is just fatigued and not tightening enough. It can't cost more than a few bucks.

I definitely would not cram anything (chemical or otherwise) into the seat tube.
re: Slipping seatpost on my KestrelRichard Weed
Jan 23, 2002 1:34 PM
Weld it.
re: Slipping seatpost on my KestrelKurtVF
Jan 23, 2002 2:00 PM
Drill a hole through the seat tube and seatpost and put a bolt through it. (I couldn't resist after hearing that "weld it" suggestion.)
Great Idea, Dick! nmcyclaholic
Jan 23, 2002 8:26 PM
sure the name isn't Richard Head? (nm)pmf1
Jan 24, 2002 4:54 AM
re: Slipping seatpost on my KestrelMCCL
Jan 23, 2002 2:13 PM
Last ditch effort. Take the seat post down to a machine shop and have them knurl the area that you neck down on. This will do two things. Raise the metal a few thou. and give a good area to grip. I can't say I have had it done but I will leave it up for discussion. MCCL
re: Slipping seatpost on my Kestrel-bad gets worse!Fat Jeff
Jan 24, 2002 12:30 AM
How timely...

Tonight while riging the trainer (YOU can take your life in your hands and ride in Honolulu after dark) the !@#% seat collar casting snapped like a piece of pig iron. So tomorrow I'll start with a call to my local dealer/warrranty guru and see what kinda repair/replace senario I'm looking at.

Funny thing is, while spinning away before the break I was dreaming of what frame I'd get if a replacement was ever needed. Answer? An IF Crown Jewel to match the Custom DeLuxe in the garage. Maybe sooner than I think?

Thanks for all the suggestions real and other wise (I'm not ruling out the drill/bolt solution just yet!)

Alooooooooooha from a damp Honolulu, Hawaii

Fat Jeff
Kestrel has a lifetime replacement. They are in Watsonville, CAJames
Jan 24, 2002 12:51 AM