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Recreational Cyclocross and Gravelbiking This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like :The Dirty Kanza". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

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Old 09-20-11, 09:38 AM   #1
Suffolk Jedi
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Seat post slipping

Following a move to the countryside I have just recently purchased a Spec Crux and I am just getting use to riding bridleways and firepaths and being shaken about.

My querry is about the the seat post. The bridelways I am cycling have been rutted by tractors and are pretty rough to cycle, today was excetionally rough going and I noticed that my seat post had slipped. This may have been because I had fiddled with it earlier on in the ride, because I think that it had slipped from the previous ride and had not tighted it enough, but it may not. My question is, Is seat post slippage something had I should expect following rough riding

Is there anything else I should keep any eye on following a rough ride
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Old 09-20-11, 10:09 AM   #2
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Tighten the clamp more and/or add some friction paste.
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Old 09-20-11, 10:46 AM   #3
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Is seat post slippage something had I should expect following rough riding
Cyclocross races require a flying remount, at a full gallop,
many times an hour, a typical race length, so the seatpost had better not slip down,
JRA on a casual ride, on a horse trail.

If it does , return to the Dealer and talk to them..

Last edited by fietsbob; 09-20-11 at 10:50 AM.
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Old 09-20-11, 11:47 AM   #4
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Originally Posted by dmcgoy View Post
Tighten the clamp more and/or add some friction paste.
I've been having a problem with this myself, despite tightening the clamp as much as seems possibly safe (and cleaning the post). What is this friction paste?
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Old 09-20-11, 12:10 PM   #5
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Thanks for the advice.

Have applied Fiber Grip from Finish Line and think I have tightened it significantly more than before, will find out on tomorrows ride. It states tighten to 6.2, but I don't have a torque guage so have been doing it by feel.

I think I also have new bike syndrome, whilst my mind says tighten it and ride it, its a bike and meant to be ridden hard off road, part of me still thinks it I might break it.
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Old 09-20-11, 12:44 PM   #6
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I'd suggest you invest in a torque wrench. Clamping down carbon parts is no place for guessing. There's a cheap and nifty little tool you can get, but the ones I've seen only have 4mm bits and click at 5 Nm (though that's probably good, even though Speciailized says you can go higher).

You can get a cheap torque wrench fron Harbor Freight for around $15: http://www.harborfreight.com/1-4-qua...ench-2696.html
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Old 09-27-11, 07:32 PM   #7
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If nothing else works including taking it back to the store where you bought it, try using a seatpost that is 0.2mm larger in diameter.
This worked for me.
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