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Thomson Masterpiece seatpost

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Thomson Masterpiece seatpost

Old 08-22-10, 09:07 PM
  #1  
andrewluke
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Thomson Masterpiece seatpost

I ordered one of these guys online in a 27.2x330mm and was at first very impressed with the build quality. This is a fine piece of gear.

Then I go to install it. Fits in the seat tube nicely as expected, but then the clamp is not quite going down right on my Fizik Arione CX saddle rails. I pull it back apart and the rails appear to be around 3-4mm too wide for the clamp. I was under the belief that saddle rail spacing was universal so I'm not sure why this is the case. I've had 4 saddles total now on 3 different posts and never experienced this.

So after all that I ask: has anyone else experienced this with their Masterpiece or Elite seatposts?

EDIT
sorry, that is the clamps are slightly too narrow for the rails.

Last edited by andrewluke; 08-22-10 at 10:26 PM.
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Old 08-22-10, 09:10 PM
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Sometimes carbon rails are different diameter, so maybe it's that. I had issues getting my Toupe with ti rails on my elite post the other day though. It was just a little too wide for the clamp but I managed to squeeze it together and it.
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Old 08-22-10, 09:19 PM
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Well the CX is the K:IUM metal rails so they're not the elliptical carbon style ones. I don't want to really have to force anything... I'm just curious why this one is narrower being that rail spacing seems to have an industry standard.

*EDIT*
I just tried cranking it down as you did since the difference is so small and it appeared to work. I just hope that it's not putting any undue pressure on the saddle because of it. I didn't really have to put too much pressure on it so I'm thinking it'll be good.

Last edited by andrewluke; 08-22-10 at 09:27 PM.
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Old 08-22-10, 09:22 PM
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Not sure. On my mountain bike my cheapo specialized saddle had no issues.
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Are they talking about spectators feeding the cyclists? You know, like don't feed the bears?
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Old 08-22-10, 10:13 PM
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I've been using a thomson elite seatpost on my antares carbon railed saddle for about a year no issues. In fact I don't recall a fitment issue when installing it so maybe it's just the problem with the arione.
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Old 08-23-10, 07:09 AM
  #6  
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I'm using Elite seatposts and Arione CX Kium saddles on two bikes, and no problems with either.
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Old 08-23-10, 08:27 AM
  #7  
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OP, I think you must be aligning something wrong. You shouldn't have to force anything.

I have used Thomsons with both Fizik's K:ium metal rails and their braided carbon rails. The rails have always nestled perfectly in the Thomson's grooves. If you have to flex the rails to fit, they are eventually going to crack.
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Old 08-23-10, 08:49 AM
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Originally Posted by FlashBazbo View Post
I have used Thomsons with both Fizik's K:ium metal rails
This is my setup as well. No problems here.
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Old 08-23-10, 08:57 AM
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milliron
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Don't recall a problem setting up my Thomson Masterpiece and Selle Italia Flite Kit Carbonio.
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Old 08-23-10, 11:24 AM
  #10  
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Maybe the OP is imstalling the seatpost wrongly. The Elite only installs one way, and I suspect the Masterpiece too, although I am not positive about that. I suspect he is installing the clamp/cradle backwards.
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Old 08-23-10, 12:28 PM
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Steel Man
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Yes. I had the same problem with the Arionne+Thomson Masterpiece set-up. Installing the saddle was a little tricky but -at least in may case- I finally did. I am now using the Aliante instead of the Arione and had no problem installing it.
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Old 08-23-10, 01:31 PM
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Here is what I'm talking about. It's literally only 2-3mm looking at it. If I tighten it down, it falls neatly into the groove with no extra effort required. I don't think the tiny bit needed will damage the saddle so I think I'm just going to go for it.


@LUCAS
There is only one way to position the seatpost directionally because of the design of the upper portion of the clamp - the Thomson labeled side oddly has to face forward (where it can't be seen). Otherwise the part that dips downward will hit the head and the saddle will be slightly nose-up. However, parallel rails are parallel rails. It's kind of hard to screw that up.

Last edited by andrewluke; 08-23-10 at 01:36 PM.
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Old 08-23-10, 01:44 PM
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I had a very old French seatpost that did not quite fit the rails on modern saddles. (I don't remember which part was too narrow.) No idea why a modern saddle and seatpost combo would mismatch though.
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Old 08-23-10, 01:54 PM
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I've squeezed saddles into seatposts like in the photo above (a great close up, btw), no ill effects so far.
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Old 08-23-10, 02:49 PM
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Originally Posted by AndyK View Post
I've squeezed saddles into seatposts like in the photo above (a great close up, btw), no ill effects so far.
Same here. I've never had a saddle rail fail on me because of this. I would think that the machined clamp of a seatpost would be more precise to specifications than the rail-to-saddle assembly because the rails are usually pressed or glued into place.
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Old 08-23-10, 02:57 PM
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Originally Posted by AndyK View Post
I've squeezed saddles into seatposts like in the photo above (a great close up, btw), no ill effects so far.
new iPhone. I'm really impressed with the camera thus far to be honest. That pic is not even close to full-sized either.




I think I'll just put the squeeze on it and not worry. Thanks for all the input.
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Old 08-23-10, 04:36 PM
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Now that I think about it and see the photo, I'm pretty sure I've had this happen in the past on my mountain bike. No problem with rail failure in that case.
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Old 08-23-10, 06:08 PM
  #18  
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I'd say the rails on your seat are a bit off, a defect of the seat, myself as well as others here have no problems with that same setup, I'd imagine you're fine squeezing it in there. I'd probably do it myself.
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Old 08-23-10, 06:12 PM
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I think I've had saddles do this. I always just squeezed it in, never had problems.
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Old 08-23-10, 06:15 PM
  #20  
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Yup. Problem with the saddle, not the seatpost. But it won't be an issue, just clamp it down.
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Old 08-23-10, 07:00 PM
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Ship it.
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Old 08-23-10, 07:24 PM
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Well this is the same with a Selle San Marcos Ponza, Cannondale, the Fizik in question, and a Specialized Phenom saddle. I'd say that it's in the seatpost because I have 2 cannondale and a 3T Doric seatpost that these all line up just peachy with.

Fack it. It's on there along with my new Red group today.... sooo sexy.
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