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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 10-21-10, 02:13 PM   #1
Bobsled
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Carbon Frame safe repair stand

So, is there a safe way to clamp a CF frame? Even the seatpost is CF so it that the lesser of all evils? I have an older Park stand with a clamp like this. http://www.parktool.com/product/spring-linkage-clamp-1
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Old 10-21-10, 02:30 PM   #2
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Do you want to crush the frame or seat post ? to be on the safe side the answer is no. Find yourself a old seat post of alloy to fit into your frame and use it. And clamp on it.
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Old 10-21-10, 02:33 PM   #3
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Pull out the carbon seatpost, with saddle, insert old, aluminum seatpost, and clamp to that.

I have that very same Park clamp, and would never use it directly on something really nice.

^^^^Too funny, identical thought, mere minutes apart.
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Old 10-21-10, 02:44 PM   #4
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or one like this : http://www.parktool.com/product/team-race-stand

take front wheel out, clamp fork in stand, and the other support sits under the BB.
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Old 10-21-10, 02:54 PM   #5
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Thanks. I guess I'll have to get some old AL seatpost then for repairs.
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Old 10-21-10, 03:00 PM   #6
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I've been using the older version of this stand since 1997:

http://www.performancebike.com/bikes...7_20000_400036

I like it better than a Park for anything that has a conventional down tube. You don't really have to tighten the clamp down very much at all for the bike to remain stable since it's supported at the BB and two points on the down tube. The only con is you can't flip the bike around at any angle you please.
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Old 10-21-10, 06:33 PM   #7
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You can use the Park ISC-1 in your current stand, and it accommodates a wide range of seat tube inside diameters, if you have several bikes:
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Old 10-21-10, 06:48 PM   #8
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Get a Park PRS-20 or equivalent and be done with it. It's far more hassle to mess around with taking the seatpost out than to pop the front wheel off.
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Old 10-21-10, 06:51 PM   #9
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i just clamp the carbon post, i have the traditional clamp like you linked to but with the adjusting nut instead of the spring. for aero posts i swap to the extreme range clamp. we have cheap alloy dummy posts in the shop but i dont bother
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Old 10-21-10, 08:55 PM   #10
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Yeah, it's one of these older ones http://www.amazon.com/Park-PCS-1-Con.../dp/B000GI0NS0
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Old 10-21-10, 09:04 PM   #11
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i just clamp the carbon post,r
+1. I've been doing it for two years on a round carbon fiber seat post. I have a Minoura stands and the seems there is enough rubber material to distribute the compressive stresses. I don't clamp more than needed - no gorilla crushing forces required.

Sometimes, I hang my seat on top of the clamp mechanism for some tasks like chain lubing and light maintenance.
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Old 10-22-10, 12:34 AM   #12
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Also been clamping my Cannondale tear-drop post and FSA round posts for 2 years with no problems. I have the PCS-10 which lets you micro-adjust the clamp strength so I start with it barely holding it and slowly twist it until it's snug enough not to slip. The only task I haven't done was torque a crankset. Would never ever clamp the frame. GL
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Old 12-27-10, 08:05 PM   #13
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Reviving this old thread to address my issue. I am planning to build a DIY pipe bike repair stand to work on my bikes. No concerns with my two steel road bikes or my two aluminum MBs but have worries about clamping the mutant 2011 Trek Madone 5.9 I have. This CF bike does not have a conventional seatpost to remove and replace for clamping. Any ideas on the best way to deal with this. I am planning on just simple stand with a cushioned pony clamp as the actual bike holder.
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Old 12-27-10, 08:09 PM   #14
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Originally Posted by jamesdak View Post
Reviving this old thread to address my issue. I am planning to build a DIY pipe bike repair stand to work on my bikes. No concerns with my two steel road bikes or my two aluminum MBs but have worries about clamping the mutant 2011 Trek Madone 5.9 I have. This CF bike does not have a conventional seatpost to remove and replace for clamping. Any ideas on the best way to deal with this. I am planning on just simple stand with a cushioned pony clamp as the actual bike holder.
http://www.youtube.com/watch?v=dIG9gZtSJ5Q skip to 1 45 on how to clamp aero posts
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Old 12-27-10, 09:20 PM   #15
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In my opinion the best ones for carbon and bikes with not rounded tubes, are those ones that actually hold the bike from the fork and form the rear end. Tacx has one.
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