Carbon Paste
#26
I eat carbide.


Joined: Jan 2006
Posts: 21,678
Likes: 1,417
From: Elgin, IL
Bikes: Lots. Chapter2, Van Dessel, Giant, Trek, etc Dealers for BMC, Chapter2
Thanks for the info. I didn't have any CF paste so used grease as I was told it would be okay. It's been a couple weeks and I only torqued to spec and so far no issues but I agree there doesn't seem to be any real reason not to use the paste so I'll grab some next chance I get and redo.
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PSIMET Wheels, PSIMET Racing, PSIMET Neutral Race Support, and 11 Jackson Coffee
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Video about PSIMET Wheels
#27
Still can't climb
Joined: Sep 2006
Posts: 23,024
Likes: 6
From: Limey in Taiwan
Toothpaste? That is creative. It makes sense.
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coasting, few quotes are worthy of him, and of those, even fewer printable in a family forum......quote 3alarmer
No @coasting, you should stay 100% as you are right now, don't change a thing....quote Heathpack
coasting, few quotes are worthy of him, and of those, even fewer printable in a family forum......quote 3alarmer
No @coasting, you should stay 100% as you are right now, don't change a thing....quote Heathpack
#28
Not always but a lot of the time. The problem is...it is easy to be deceived how much torque is being applied. Since carbon has a smaller elastic zone prior to fracture...albeit with a high yield strength...I generally will use a torque wrench...pretty much always on the seat tube clamp in particular...the seat tube is something I just don't want to crack
And if undertorqued...seat tubes tend to slip...I weigh 190#. I have good luck at 55 in-lbs and what I use on all my bikes...including Ti.I am a long time wrench head...built many high performance cars, motorcycles and build my own bikes like many here. I have a pretty calibrated hand...and yet when it comes to carbon fiber in particular, I will generally use a torque wrench. I don't use one on aluminum stem clamp bolts for example...even with carbon handlebar...carbon has great compressive strength...so it depends on the application.
My torque wrenchs of choice are Craftsman...have a few different sizes. Snap on are better if you like the best...go that route...or equivalent.
Last edited by Campag4life; 02-13-13 at 07:16 AM.
#29
Thread Starter
Senior Member

Joined: Nov 2012
Posts: 2,504
Likes: 251
From: Palm Desert, CA
Bikes: Speedvagen Steel
thanks! With those brands, sounds like I can simply go to Lowe's to pick up one with a set of bits? I was a successful mechanic/parts manager and wheelbuilder back in the mid 80's but jeez equipment has changed so much. Still want to assemble my new bike myself prior to professional fit and steerer tube cutting.
#30
thanks! With those brands, sounds like I can simply go to Lowe's to pick up one with a set of bits? I was a successful mechanic/parts manager and wheelbuilder back in the mid 80's but jeez equipment has changed so much. Still want to assemble my new bike myself prior to professional fit and steerer tube cutting.

Good luck with your build.
#31
Thread Starter
Senior Member

Joined: Nov 2012
Posts: 2,504
Likes: 251
From: Palm Desert, CA
Bikes: Speedvagen Steel
I used to build wheels for Marinoni back in Mtl late 80's as well as the shop I worked for, thought we were cutting edge... Now wheels are built so well and so light, don't require regular truing it's unbelievable. My new wheels are being built by November
#32
thanks, Neither am I anymore
I used to build wheels for Marinoni back in Mtl late 80's as well as the shop I worked for, thought we were cutting edge... Now wheels are built so well and so light, don't require regular truing it's unbelievable. My new wheels are being built by November
I used to build wheels for Marinoni back in Mtl late 80's as well as the shop I worked for, thought we were cutting edge... Now wheels are built so well and so light, don't require regular truing it's unbelievable. My new wheels are being built by November
I simply ride off the shelf wheels and have had great luck....
Cheers.
#33
Senior Member
Joined: Feb 2013
Posts: 1,472
Likes: 11
From: Near St. Louis, Missouri
Bikes: Giant Defy Advanced, Breezer Doppler Team, Schwinn Twinn Tandem, Windsor Tourist, 1954 JC Higgens
I had a CF seatpost in a CF frame that kept slipping. So I kept tightening the clamp down some more. And more. Finally the split in the seatpost clamp was metal to metal and the seatpost was crushed. Did I mention that it wasn't a normal round seatpost? No it was a much more expensive teardrop-shaped seatpost. 
Lessons learned:
1. Bought a little torque wrench that would go down to the recommend 5 nm setting.
2. Tacx Dynamic Carbon Bicycle Assembly Compound - which is what I should have used in the first place.

Lessons learned:
1. Bought a little torque wrench that would go down to the recommend 5 nm setting.
2. Tacx Dynamic Carbon Bicycle Assembly Compound - which is what I should have used in the first place.





