31.6 seatpost in frame with 32.4 carbon seat tube okay?
03-18-07, 08:50 PM
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31.6 seatpost in frame with 32.4 carbon seat tube okay?
Has anyone tried this, results? There are only about 2 or 3 posts offered in the 32.4 size. Most of them heavy and expensive. I'm wondering if it's possible to to fit a 31.6 and maybe use electrical tape to wrap around the circumference of the post to beef it up for a 32.4 seat tube (carbon frame)?
I'm planning to purchase the 31.6 KCNC seat post. I'd appreciate any help. Thank you in advance.
I'm planning to purchase the 31.6 KCNC seat post. I'd appreciate any help. Thank you in advance.
03-18-07, 09:24 PM
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You need to get or make a proper shim - not electrical tape. Better hardware stores sell shim stock in different thicknesses.
03-18-07, 09:25 PM
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Originally Posted by samsation7
Has anyone tried this, results? There are only about 2 or 3 posts offered in the 32.4 size. Most of them heavy and expensive. I'm wondering if it's possible to to fit a 31.6 and maybe use electrical tape to wrap around the circumference of the post to beef it up for a 32.4 seat tube (carbon frame)?
I'm planning to purchase the 31.6 KCNC seat post. I'd appreciate any help. Thank you in advance.
I'm planning to purchase the 31.6 KCNC seat post. I'd appreciate any help. Thank you in advance.
Why not just get a 32.4mm Thomson Elite?
03-18-07, 09:48 PM
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Why not just buy a proper shim from competitivecyclist for like 10 bucks?
03-18-07, 10:56 PM
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Hi samsation7-
Obtaining the proper seatpost or at least the correct shim is cheap insurance. My preference would be to go with the 32.4mm and be done with it with no regrets or nagging concerns in the back of your mind.
~ Blue Jays ~
Obtaining the proper seatpost or at least the correct shim is cheap insurance. My preference would be to go with the 32.4mm and be done with it with no regrets or nagging concerns in the back of your mind.
~ Blue Jays ~
03-18-07, 11:52 PM
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Originally Posted by Blue Jays
Obtaining the proper seatpost or at least the correct shim is cheap insurance. My preference would be to go with the 32.4mm and be done with it with no regrets or nagging concerns in the back of your mind.
03-19-07, 12:33 AM
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Originally Posted by Pico
Electrical tape will probably slip. You could shim it with something else but you're probably better off just getting a 32.4 seatpost. Another problem is that carbon frames usually require tight tolerances on the seatpost diameter so if your shim isn't 32.4 +/- 0.15mm or so then you could crack the frame.
Why not just get a 32.4mm Thomson Elite?
Why not just get a 32.4mm Thomson Elite?
03-19-07, 12:38 AM
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Hi samsation7-
How about the Thomson Masterpiece to shave approximately 40 additional grams? If not, what about a cool-looking MAXM titanium and carbon fiber Exogrid model? They're extremely light and around $240.00 or something like that. I do know it's available in 300mm and 400mm lengths and not sure about diameters. It is one of the sharpest-looking ones on the market right now.
~ Blue Jays ~
How about the Thomson Masterpiece to shave approximately 40 additional grams? If not, what about a cool-looking MAXM titanium and carbon fiber Exogrid model? They're extremely light and around $240.00 or something like that. I do know it's available in 300mm and 400mm lengths and not sure about diameters. It is one of the sharpest-looking ones on the market right now.
~ Blue Jays ~
Last edited by Blue Jays; 03-19-07 at 01:02 AM.
03-19-07, 12:38 AM
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Originally Posted by slvoid
Why not just buy a proper shim from competitivecyclist for like 10 bucks?
I just checked....can't find a shim that converts 31.6 to fit 32.4
Any other source? Thanks.
03-19-07, 01:27 AM
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Originally Posted by samsation7
Hi Slvoid,
I just checked....can't find a shim that converts 31.6 to fit 32.4
Any other source? Thanks.
I just checked....can't find a shim that converts 31.6 to fit 32.4
Any other source? Thanks.
03-25-07, 03:29 PM
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I wouldn't use a shim. the seatpost needs to be snug all the way down the seat tube. otherwise there will be a stress point at the clamp.
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03-25-07, 04:20 PM
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Heavy seat post vs. broken frame. Just remove the seat and post if you want to save weight.
03-25-07, 05:09 PM
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Originally Posted by DocRay
If you do go with a shim, make sure it's not aluminum, the aluminum with galvanically weld to the carbon very quickly.
Carbon fiber doesn't galvanically weld to anything. Thats why you dont need to grease seatposts in carbon frames. the polymer that the carbon is encased in is for all intents and purposes non-reactive with aluminum, or most metals for that matter.
03-25-07, 06:49 PM
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