Quick release clamp is not clamping tight enough

Sorting out your thrunge brackets, fettling your inter-rositers and even stuff about bike parts.
danlightbulb
Posts: 426
Joined: Sun Dec 25, 2011 18:17 pm

Quick release clamp is not clamping tight enough

Postby danlightbulb » Sun Dec 23, 2012 21:21 pm

Hi all,

I am finding the quick release seat clamp to be very difficult. It needs a stupid amount of force to close it otherwise the seat moves (nose rotates slightly to the left but also drifts down over the course of 20 minutes or so). Today I couldn't even get it closed properly although it was gritted up.

Are there any better ones out there?

Thanks

User avatar
nicklouse
Lives Here
Posts: 80713
Joined: Thu Mar 20, 2003 12:14 pm

Re: Quick release clamp is not clamping tight enough

Postby nicklouse » Sun Dec 23, 2012 21:28 pm

what clamp is it?

have you removed it and cleaned it?
"Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools :?:SheldonBrown

User avatar
Greer_
Posts: 1651
Joined: Tue Apr 12, 2011 15:31 pm

Re: Quick release clamp is not clamping tight enough

Postby Greer_ » Sun Dec 23, 2012 21:34 pm

Try a shimano deore one. Best there is, but they're not light!

danlightbulb
Posts: 426
Joined: Sun Dec 25, 2011 18:17 pm

Re: Quick release clamp is not clamping tight enough

Postby danlightbulb » Sun Dec 23, 2012 21:35 pm

Non named brand off a rockrider 8.1.

Yes Ive stripped it all down and cleaned it. The seat post itself has a very greasy surface also, should I degrease the thing?

Thanks

User avatar
Greer_
Posts: 1651
Joined: Tue Apr 12, 2011 15:31 pm

Re: Quick release clamp is not clamping tight enough

Postby Greer_ » Sun Dec 23, 2012 22:43 pm

Oops never realised it was a seat clamp, doh! Seatposts quite often have a bit of grease on them so they don't seize inside the seat tube. If you don't use the QR an awful lot I'd recommend a plain old bolt up clamp. I recently changed mine as it wasn't clamping hard enough and i've had no problems since.

User avatar
nicklouse
Lives Here
Posts: 80713
Joined: Thu Mar 20, 2003 12:14 pm

Re: Quick release clamp is not clamping tight enough

Postby nicklouse » Sun Dec 23, 2012 22:55 pm

danlightbulb wrote:Non named brand off a rockrider 8.1.

Yes Ive stripped it all down and cleaned it. The seat post itself has a very greasy surface also, should I degrease the thing?

Thanks

Some grease is needed to stop it seizing. But that should not effect the clamping.
"Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."

Parktools :?:SheldonBrown

danlightbulb
Posts: 426
Joined: Sun Dec 25, 2011 18:17 pm

Re: Quick release clamp is not clamping tight enough

Postby danlightbulb » Sun Dec 23, 2012 23:16 pm

The piece of metal that sits between the lever and the body is really thin. Maybe this is why its not very good.

Image

User avatar
TheNorthernTrain
Posts: 1024
Joined: Sun Oct 25, 2009 23:21 pm

Re: Quick release clamp is not clamping tight enough

Postby TheNorthernTrain » Mon Dec 24, 2012 00:09 am

I've bent the lever on my qr just through having to do it up tight enough to stop the exact same problem. Just kinda got used to it now. It's fine unless the going gets rough and I don't have the energy left to stand on the pedals.

Never had a problem with my Non-QR clamp though, if you really don't use a QR that much then switch to a standard clamp. If I'm going on an XC jaunt then I tend to take the QR clamp off as I don't really need to move the seat much. The other option, slightly more expensive, is to get an adjustable seatpost.
MmmBop

Go big or go home.

User avatar
The Rookie
Posts: 23083
Joined: Thu Apr 30, 2009 09:29 am

Re: Quick release clamp is not clamping tight enough

Postby The Rookie » Mon Dec 24, 2012 08:13 am

As it's metal on metal (most use a Nylon bush) that needs to be kept lubed to prevent the friction dominating the lever closing force rather than the clamp load.

danlightbulb
Posts: 426
Joined: Sun Dec 25, 2011 18:17 pm

Re: Quick release clamp is not clamping tight enough

Postby danlightbulb » Sun Dec 30, 2012 00:48 am

The Beginner wrote:As it's metal on metal (most use a Nylon bush) that needs to be kept lubed to prevent the friction dominating the lever closing force rather than the clamp load.


After cleaning it all up and applying a bit of grease to the metal bushing, it was much much better. Thanks.


Return to “MTB Workshop & Tech”

Who is online

Users browsing this forum: No registered users and 1 guest