racman Posted March 27, 2007 Share A question to the experts yet again - besides the obvious comments about being too heavy etc, etc, - how tight should one tighten the seatpost clamp for a carbon seatpost? I had to stop 3 times on Saturday due to the seatpost slipping down. The previous seatpost cracked and broke at the Tour Stellenbosch from someone overtightening (I think). Is there any secret to avoid this slip - I noticed that the post had oil on from the pre-Argus service, which I heard sometimes caused CF to slip. Any ideas/help?racman2007-03-27 07:35:52 Link to comment Share on other sites More sharing options...
AndreZA Posted March 27, 2007 Share NEVER lube carbon parts. The liquid goes into the carbon and weakens it. Do you have a special carbon seatpost clamp? The are made so that you can tighten the post without being crushed. Link to comment Share on other sites More sharing options...
racman Posted March 27, 2007 Share no Mampara - just the standard clamp that is on the frame. I didin't even know that there was a special clamp - where do I get one? Link to comment Share on other sites More sharing options...
Buff Posted March 27, 2007 Share You also get a special paste/lube to use on Carbon posts and handlebars (red in colour feels like sandy greece). Most decent bike shops use it. Link to comment Share on other sites More sharing options...
TitusTi Posted March 27, 2007 Share You do get proper Carbon Grease, ask Lea at Cycle Factory about it. And he should be able to tell you what it's supposed to be torqued to. Link to comment Share on other sites More sharing options...
Jason Posted March 27, 2007 Share http://www.santanatandem.com/carbonseatpost.pdf Link to comment Share on other sites More sharing options...
RodTi Posted March 27, 2007 Share Stupid question this - but where would you need to use lube (carbon-specific or whatever) on handlebars? Can understand the seatpost - but the bars? Link to comment Share on other sites More sharing options...
racman Posted March 27, 2007 Share RodTi - maybe so your hands don't get all "chapped" and blistered!!! racman2007-03-27 07:49:29 Link to comment Share on other sites More sharing options...
AndreZA Posted March 27, 2007 Share no Mampara - just the standard clamp that is on the frame. I didin't even know that there was a special clamp - where do I get one? They basically look like this and any bike shop sells them. Asymmetric Seat Clamphttp://www.totalcycling.com/images/image/19000_175011.jpg Link to comment Share on other sites More sharing options...
Buff Posted March 27, 2007 Share Stupid question this - but where would you need to use lube (carbon-specific or whatever) on handlebars? Can understand the seatpost - but the bars? Where you clamp the carbon bars onto the stem. Link to comment Share on other sites More sharing options...
SwissVan Posted March 27, 2007 Share A question to the experts yet again - besides the obvious comments about being too heavy etc' date=' etc, - how tight should one tighten the seatpost clamp for a carbon seatpost? I had to stop 3 times on Saturday due to the seatpost slipping down. The previous seatpost cracked and broke at the Tour Stellenbosch from someone overtightening (I think). Is there any secret to avoid this slip - I noticed that the post had oil on from the pre-Argus service, which I heard sometimes caused CF to slip. Any ideas/help?[/quote'] The old journey mans saying goes...Tight is tight and to tight is F+*&ED - velly true for carbon bits. Remove all previous oil / grease, and use only the correct lube as mentioned in previous posts, or no lube. the manufacturer will recommend a torque for the seat post clamp, if you are not sure how much 25 inch lbs is beg borrow steal a suitable torque wrench and tighten to the correct value. if the seat post is the original one that came with the bike it should be the correct dia, buts its worth checking to see what the dia is and that it is correct for the frame (check frame manufacturers web site). If after 3 attempts to tighten it and it still slips then something is wrong (unless you did not tighten enough - but it sounds like you did), remove lube in frame and on post , check dia of post is correct for frame and tighten correctly. Link to comment Share on other sites More sharing options...
Kritzie Posted March 27, 2007 Share Get the seatpost clamp that you can use both for carbon and normal seat posts! Link to comment Share on other sites More sharing options...
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