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Seat moves / tilts when I ride.
NB: Originally posted elsewhere on the Global Riders Network and appears via syndication.
My seat is changing its tilt position when I ride. It's so annoying that I turned around and came home rather than go riding at Glenrock.
The seat post is a Pro Tharsis and I have the clamp tightened to 13nm as recommended.
Note: This is a new problem and my fear is that the post has worn out - which is not good considering it has only had minimal use.
Any suggestions ?
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Tighten it up to 14Nm. Test ride. Keep increasing the tightness until it stays fir or breaks. If it breaks then it wasn't a good seat post to start with so no loss.
Considering the manufacturer recommends 13nm and up until recently it worked perfectly I'm probably not going to tighten it more than 13nm.
Anyhow, I appreciate the advice. Cheers.
Let us know when you solve the problem.
wonder if you could try locktite on the interface - i'm having the same problem with a specialized command post - just thinking the locktite might do the thing.
Hey tdunster. Try checking the condition of the teethed section on the clamp. I'm not familiar with the brand you have mentioned and the quality or otherwise of that brand, but I recently discovered on a mates bike that the teeth had become rounded and no longer provided any "clamping" even when tightened to the recommended nm. This resulted in the seat tilting on every ride. Like you, the post/clamp hadn't had a lot of use in terms of riding, but he did admit to having adjusted the tilt and fore/aft position of the saddle a number of times over the past year (not sure why
). He replaced the clamp and problem solved.
Good luck.
If it's shifting around in your frames seat tube then try some carbon grease. A slightly abrasive grease that stops parts from moving around, originaly made for the lighter pressures that carbon have to be clamped without being crushed.
try the cheaper option toothpaste , it works on my hard tail even tho it will be gone very soon ,I hit up the finance & gone a dually 29er now wish I spent the money on a dually before the hardtail ..
All that money you saved on carbon paste has funded your new bike!
You won't know yourself on a dually 29er. Enjoy!
Cheers Fat Stacks for the help.
The clamps don't appear to have any teeth on them so you might be on to something . But I'm not sure if they have worn off or it was manufactered this way on purpose.
The clamps and bolts themselves are Ti and are in contact with the rail of the seat post and the T800 UD Carbon fibre post.
The instructions say to never use grease on the clamping areas. However, it does say to use FIX AID on seat post tube clamping area.
I'm unsure if that means where the post enters the frame of where the clamps and saddle meet ?
Note: The Pro Tharsis is the highest quality and priced components made by Shimano [ i.e More expensive than XTR).
2 year warranty, so return it to were you purchased it, get them to sort it or replace it, and its not made by shimano, the pro company is owned by shimano
Cut a 1" x 1.5" square off an old inner tube and sandwhich that between the (missing) teeth clamp of the seat pillar. It will be rock solid with no slipping at all.
Thanks to everyone for their help. The Shimano rep will be coming around to my lbs this week so hopefully he or she will get it sorted for me.
Pro / Shimano returned my seatpost back to my LBS. Pro concluded that there was nothing wrong with the seatpost.
Given that neither myself or my LBS can get the post to hold the seat in it's correct position (rather than tilting as soon as you put weight on it) I'm pretty much stumped with the manufacturers decision.
When you spend over $200 on a seatpost you would expect a lot more from the product and indeed the service from the company that manufacturers it.
The Pro Tharsis seatpost is a terrible product from a terrible company. I will never buy another product from them again - what I will do though is tell everyone I meet about my experience with this product and company.
rant over.
The stock post on my scott scale did the same, changed to an FSA dual bolt seatpost and no problems since
Absolutely. I'll be going with a dual bolt design for sure. Is the FSA dual bolt you have carbon ?
I would look towards the raceface posts they have a seperate arm for the tilt after bollts have been tighten on the rails . I have had one in the past awesome seatpost from my experience when I was over 100kg with all my gear on
Thomson
They only do a 16mm setback. For the 29er I had to go with FSA 32mm setback carbon goodness http://www.chainreactioncycles.com/Models.aspx?M...
Not sure which state you're in, but this sounds like an Office of Fair Trading (or whatever the equivalent in your state is) issue.
If your LBS can't get it to function properly, and they won't give you a refund as they should, give Fair Trading a call and ask about what course of action you should take.
This is potentially a safety issue - if your seat moves around unexpectedly at the wrong moment it could have consequences.
The problem with the Consumer Guarentee is that I need to claim against the business that I handed my money to in exchange for the goods / items.
Not going to happen. My LBS has always looked after me and I'm not prepared to sell them out because Shimano / Pro have done the wrong thing.
On a side note. The reason Shimano said the post was not faulty was that when it arrived to them it only had 7nm of torque rather than the recommended 13nm.
The reason it only had 7nm was because the bolt had loosened itself off after about 5 mins or less of riding from 13nm to 7nm.
I know this to be the case and my LBS knows it and are willing to back me up.
Hence, Shimano have assumed that my LBS went to the expense of returning a part to them without actually testing it first.
So in a nutshell, money doesn't concern me and and I'm more than willing to take a financial hit.
What I'm not willing to accept though is Shimano treating myself and my LBS as fools.
This product is not fit for purpose and as a result it is a potential safety issue.
Thanks to everyone for the recommendations regarding seatposts and consumer law - it is most appreciated.
I'm not sure how wanting the original transaction to result in you having a seatpost that "works as advertised" is you selling them out.
As you've said, the obligation is between you and them. So far as I can see, they've not met their side of the bargain. The agreement between them and their supplier is little to do with you, apart from them using it as an excuse to pass the buck.
I'd simply say to them "I bought a seatpost from you that we both know is faulty. Where do we go from here?" and then shut up. If they aren't prepared to replace it with one that works properly and either refund you or ask you to pay the difference, then you'll know your loyalty is not being reciprocated.
Keep us updated.
I got my command post fixed in Whistler. They applied carbon paste to the interface (where the 2 round plates meet and greet). That fixed it pretty good. They said it is not an uncommon problem.