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Seatpost - Carbon or Titanium(18 posts)

Seatpost - Carbon or TitaniumPat
Mar 19, 2001 9:47 AM
I have only used aluminum in the past. Going to purchase a new one for my Litespeed Ultimate. Cannot decide between carbon or titanium. Any thoughts? Pros and Cons? Thanks.
CarbonTsunami
Mar 19, 2001 10:07 AM
The carbon looks better (carbon clashes with Ti frames nicely) and is in most cases lighter. But the main reason you should go carbon is that you have a Ti frame, and when Ti and Ti go together it can vulcanize. You can prevent the vulcanization by using gobs of Ti prep if you do decide to go to a Ti post instead of carbon.
CarbonSkip
Mar 19, 2001 10:28 AM
Right idea, but vulcanization is a process used in tire making. The correct term I'm sure you mean is galling and "freezing".

Skip
Thanks for clearing that up...Ben Tufford
Mar 19, 2001 4:24 PM
I thought Vulcanization was some strange ritual I'd seen on Star Trek. :-)
thanks for clearing that upTsunami
Mar 19, 2001 4:39 PM
i did not know what the word was, i assumed vulcanized was the right word becuase i saw that word on the directions of my patch kit, and thought it occurred for all materials and not just tires.
CarbonBender
Mar 20, 2001 2:09 PM
Technically, galling is caused when parts interfear (mechanically) with one another during assembly. Galvonic corrosion is what I believe we are trying to convey here. Galvonic corrosion occurs when similar metal materials are within close proximity to one another, like a seat post in a seat tube, over time. Ti prep will greatly reduce the corrosive reaction of the parts over time as mentioned earlier but it will not eliminate the problem. If you go with a Ti post, be sure to grease it (isolate) yearly, along with your other routine maintence (BB, hubs, etc.).

Cheers
Carbonyue98
Mar 20, 2001 2:56 PM
I work in the aerospace biz, satelitte to be exact. Ti with a little grease, like the instruction said is fine. You don't need to relube after the first installation unless you're taking in apart for other reasons.
re: Seatpost - Carbon or TitaniumSkip
Mar 19, 2001 10:20 AM
They will both scratch. The carbon, depending on make/model, may be more prone to fracture/crushing - check with manufacturer - you may need to clamp it from the front (opposite side as the split down the back of your seat tube) to minimize this phenomonen (certain bikes are more prone to cause this - heard that the Campy Record is one of the carbon posts sensitive to this crushing. Both can be had at similar weights. If you go with Ti, in your Litespeed - be sure to use an anti sieze, such as Ti Prep by Finish Line. The carbon will be more prone to slipage.

Skip
'They will both scratch'TJeanloz
Mar 20, 2001 6:05 AM
Hogwash. A properly prepared seattube should be smooth as a baby's bottom. Litespeed seattubes do not come from the factory 'properly prepared' and it takes about 10 minutes with a flex-hone to get the seattube smooth enough for post insertion. The same job takes ten seconds in an aluminum bike; ti is tough stuff. Anyway, make sure that your dealer does the little things like seat tube preparations when you lay out that much cash on a bike- if it's done right, there will be no scratching.
'They will both scratch'Skip
Mar 20, 2001 9:45 AM
Sorry TJ, but not hogwash, my Merlin XL's seat tube was "properly prepared" with a flex-hone (of the proper diameter) and flex-hone oil - yes, much longer than 10 minutes. The inside of my seat tube was as smooth, if not smoother than a baby's bottom, all grindings/filings/material was removed and flushed/rinsed/etc., yet still scratched both my Campy Record carbon and my Bold Ti posts. The owner of Bold said that it is normal and to be expected that Ti will scratch Ti and nothing can be done to prevent it.

Skip
'They will both scratch'TJeanloz
Mar 20, 2001 9:56 AM
I have inserted seatposts of all materials (aluminum, carbon, ti) into both my Litespeed and my Merlin, and I have no scratches to report. Litespeeds though (and probably your Merlin, if it's new) are the biggest flex-hone pain ever. But then, in the wintertime, I have nothing better to do than hone away.
'They will both scratch'Skip
Mar 20, 2001 10:09 AM
You are indeed very lucky then to not get scratches. Yes, my MXL was new (last of the line before Lightspeed took over).

Skip
Go TiKerry Irons
Mar 19, 2001 4:39 PM
How can you not go with a Ti post in a Ti frame - it's the whole enchalada, the whole hog, the whole nine yards, the full Monty. Also, grease works just fine (as recommended by Litespeed) for preventing seizing in Ti frames - no need for messy or expensive Ti-prep or anti seize. I've got a Ti post and stem in my Ti frame and have had no problems with just grease (including BB noises) in 3 years/25K miles.
No, carbonJack S
Mar 20, 2001 6:26 AM
The whole enchilada would then be a ti fork with ti bike and ti post and ti other bits. Since it's mostly and aesthetic thing, go for a little contrast- ti bike with carbon fork and post. Besides, carbon posts still have the cool factor whereas ti posts don't (if they are even noticed at all).
Yeah, what he said...ANDKreeger
Mar 20, 2001 9:03 AM
...Check this one out. Only 160 gm & $69. Can't beat that price.

http://www.pedalforce.com
don't screw aroundderf
Mar 20, 2001 1:37 PM
with a link that doesn't work... get a Campagnolo ($96 at total) or Serotta (just plain sweet, and these actually are light)
screw away...LightBoy
Mar 20, 2001 2:50 PM
worked fine for me...
re: Seatpost - Carbon or TitaniumSyko13
Mar 21, 2001 6:47 PM
I have a Ti on my Ti mtn Bike and a Carbon on my Ti road bike and they are both great. you can't go wrong either way.