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Carbon steerer star nut torque
I'm currently building up a Litespeed with a Real Design carbon
steerer tube. Can anyone tell me the torque value required for the star nut that goes in the steerer tube? I've been to Real Design's website, but did not find any specs there. Thanks, Greg |
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#2
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Carbon steerer star nut torque
last one I did was about 45-50 pounds but that was an older model call Real Design USA PO Box 22666 Chattanooga, TN 37422 PH: 888.564.6694 ... EM: or Lightspeed if they haven't left town. |
#3
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Carbon steerer star nut torque
"Gig Miller" wrote in message ... I'm currently building up a Litespeed with a Real Design carbon steerer tube. Can anyone tell me the torque value required for the star nut that goes in the steerer tube? I've been to Real Design's website, but did not find any specs there. Thanks, Greg You probably won't find a value. I'm assuming you mean before tightening the stem, in which case, it's just enough to ensure there is no slack in the headset. I normally slightly over-tighten it to make sure there is no slack and then back it off until the allen wrench just becomes easy to turn (not too easy). Tighten the stem and then tighten the bolt through the star nut so it won't come loose but not so tight as to pull the star nut out. Phil H |
#4
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Carbon steerer star nut torque
Gig Miller wrote:
I'm currently building up a Litespeed with a Real Design carbon steerer tube. Can anyone tell me the torque value required for the star nut that goes in the steerer tube? I've been to Real Design's website, but did not find any specs there. Thanks, Greg it sets the headset bearing tightness/function, so you need to adjust for that, not for a specific torque. |
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Carbon steerer star nut torque
On Sat, 12 Apr 2008 16:18:00 -0700 (PDT), Gig Miller
may have said: I'm currently building up a Litespeed with a Real Design carbon steerer tube. Can anyone tell me the torque value required for the star nut that goes in the steerer tube? I've been to Real Design's website, but did not find any specs there. Just snug enough to take all the slack out of the headset and put a very slight amount of tension on it; the bolt that goes into the star nut has completed its task and could be thrown away once the stem has been cinched down on the steerer. BTW, the stem clamp is one place where you really do need to be careful not to overtighten. It's way too easy to crush a carbon steerer. A drop of low-strength Loctite on the cap bolt will keep it in place without the need to go all Captain Overtorque on it, and there's zero reason to make that bolt any tighter than is required to keep it from ejecting like a low-bidder test pilot. Just snug plus a trifle is plenty. -- My email address is antispammed; pull WEEDS if replying via e-mail. Typoes are not a bug, they're a feature. Words processed in a facility that contains nuts. |
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Carbon steerer star nut torque
TEST AS YOU SNUG IT DOWN better yet, test on a buddy's bike or better than that, get someone to pay you to practice ! running the bolt down to "begins to tighten" several times then into the process shuld give a head start. for that price level, phone consultations are justified |
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Carbon steerer star nut torque
On Apr 13, 1:18*am, Gig Miller wrote:
I'm currently building up a Litespeed with a Real Design carbon steerer tube. Can anyone tell me the torque value required for the star nut that goes in the steerer tube? I've been to Real Design's website, but did not find any specs there. Thanks, Greg Don't use a star nut in a carbon steerer. That can lead to failure which would be bad. Use and expansion plug made for carbon steerers. Joseph |
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Carbon steerer star nut torque
wrote in message ... On Apr 13, 1:18 am, Gig Miller wrote: I'm currently building up a Litespeed with a Real Design carbon steerer tube. Can anyone tell me the torque value required for the star nut that goes in the steerer tube? I've been to Real Design's website, but did not find any specs there. Thanks, Greg Don't use a star nut in a carbon steerer. That can lead to failure which would be bad. Use and expansion plug made for carbon steerers. Joseph You bring up a good point, which should be to use the method recommended by the fork manufacturer. The following story illustrates this. http://www.serotta.com/forum/showthread.php?t=42900 "Cannondale uses a starnut. I thought that was stupid and replaced it with a compression plug. Last week I replaced that frame, and as I was taking it apart I found where the compression plug had basically split the fork half way around. I suppose I was only weeks away from certain dental work. I would use the method that the fork manufacturer recommends... I sure am glad that my new fork has an aluminum steerer tube." Phil H |
#9
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Carbon steerer star nut torque
Phil Holman wrote:
wrote in message ... On Apr 13, 1:18 am, Gig Miller wrote: I'm currently building up a Litespeed with a Real Design carbon steerer tube. Can anyone tell me the torque value required for the star nut that goes in the steerer tube? I've been to Real Design's website, but did not find any specs there. Thanks, Greg Don't use a star nut in a carbon steerer. That can lead to failure which would be bad. Use and expansion plug made for carbon steerers. Joseph You bring up a good point, which should be to use the method recommended by the fork manufacturer. The following story illustrates this. http://www.serotta.com/forum/showthread.php?t=42900 "Cannondale uses a starnut. I thought that was stupid and replaced it with a compression plug. Last week I replaced that frame, and as I was taking it apart I found where the compression plug had basically split the fork half way around. I suppose I was only weeks away from certain dental work. I would use the method that the fork manufacturer recommends... I sure am glad that my new fork has an aluminum steerer tube." Phil H What makes a Cannondale carbon steerer so 'special' that it is more prone to splitting by a compression plug than other forks? My guess is that the person used to much torque. You can break everything you know and some people do it all the time. A compression plug is only needed for preloading the headset. Lou |
#10
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Carbon steerer star nut torque
In article ,
"Phil Holman" piholmanc@yourservice wrote: You bring up a good point, which should be to use the method recommended by the fork manufacturer. The following story illustrates this. http://www.serotta.com/forum/showthread.php?t=42900 "Cannondale uses a starnut. I thought that was stupid and replaced it with a compression plug. Last week I replaced that frame, and as I was taking it apart I found where the compression plug had basically split the fork half way around. I suppose I was only weeks away from certain dental work. I would use the method that the fork manufacturer recommends... I sure am glad that my new fork has an aluminum steerer tube." I understand that one needs to make sure that the level of the expansion plug is within the protective band of the stem. So in effect, the stem protects the outer of the CF steerer tube. -- |
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