What is the maximum spoke tension for the Duroc 50?- Mtbr.com
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  1. #1
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    What is the maximum spoke tension for the Duroc 50?

    Anybody know what the maximum spoke tension for Duroc 50's are? It's not listed on Sun Ringle's web site.
    Thanks in advance.
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  2. #2
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    I don't know but ime 120 kgf is always a pretty safe bet.
    I brake for stinkbugs

  3. #3
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    ^^^ that's what I use irrespective of rim.
    Do the math.

  4. #4
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    Tighten until the spoke nipples round off, then back it off half a turn.

  5. #5
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    Thanks for the guesses but nobody wins a cigar. Sun-Ringle emailed me back today. Here is their response.


    Max tension is 100-110kgf.


    Eric


    Technical Support l Hayes Bicycle
    Phone 888-686-3472
    Hayes Performance Systems l 5800 W Donges Bay Rd Mequon WI 53092 United States.




    What is the maximum spoke tension for the Duroc 50?-20190129_165215%7E2.jpg

    I had it set at 120kgf according to my Park Tool tension meter. About seven of them did this.
    Last edited by huckleberry hound; 3 Weeks Ago at 03:14 PM.
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  6. #6
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    Dang, I have my WTB kom's @150 kfg, no problems.
    I brake for stinkbugs

  7. #7
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    Quote Originally Posted by J.B. Weld View Post
    Dang, I have my WTB kom's @150 kfg, no problems.
    kfg = kilo effing grams?
    Do the math.

  8. #8
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    Quote Originally Posted by Lone Rager View Post
    kfg = kilo effing grams?


    Damn straight, I don't f- around.
    I brake for stinkbugs

  9. #9
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    Quote Originally Posted by huckleberry hound View Post
    I had it set at 120kgf according to my Park Tool tension meter. About seven of them did this.

    The Park tensio is good for relative numbers but not so much for absolutes.

  10. #10
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    Quote Originally Posted by mikesee View Post
    The Park tensio is good for relative numbers but not so much for absolutes.
    I was in the market for a tensio meter and was looking @ the park unit. I asked a local builder (experienced) what he thought of the Park unit " it has numbers and maybe you can get numbers similar but what they actually relate to..." I think he was telling me it wasn't that accurate.

  11. #11
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    As Mike said, it's good to check the relative tensions of the spokes to each other on a build, but not sure I really trust it - I have 2, they both read different. I bought it when I first started building and fixing my own and friends wheels about 11 years ago, haven't actually used it but to check relative tension sometimes of spokes to each other, set actual tension by feel, once I do my hard de-tensioning when it feels like it's up to proper tension and get no/maybe 1 pops/pings, then I'm right where I need to be for a strong wheel.

    Quote Originally Posted by keen View Post
    I was in the market for a tensio meter and was looking @ the park unit. I asked a local builder (experienced) what he thought of the Park unit " it has numbers and maybe you can get numbers similar but what they actually relate to..." I think he was telling me it wasn't that accurate.
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  12. #12
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    Quote Originally Posted by huckleberry hound View Post
    I had it set at 120kgf according to my Park Tool tension meter. About seven of them did this.
    Doh!
    that's what internet opinions will do fer ya, unfortunately.
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    Time to stop believing the hype and start doing some science.
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  13. #13
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    Quote Originally Posted by aerius View Post
    Tighten until the spoke nipples round off, then back it off half a turn.
    You can actually do that ONCE, since youll only round off two corners.

  14. #14
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    I'm also wondering if my choice of spokes could have contributed to the rim cracking around the spoke holes. I used Sapim Strong which are a single butted spoke with 13g head and elbows then straight 14g the rest of the way. I weigh 250-260# with hydration pack. This was the rear wheel. I just replaced the rim but re-used the same spokes. I'm wondering if I should change the spokes to Sapim Race DB spokes.
    When I rebuilt the wheel I did set the tension at 107kg/f with my park tool tension meter. Am I over thinking this and will I be fine with the current spokes or should I change them? I see that Nobl wheels says not to use 14g straight gauge spokes because it will cause the to crack and it will void their warranty if you use them.
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  15. #15
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    Yeah. IMO, skinny spokes are more elastic so help distribute loads among themselves when a rim deflects. Since the large majority of spoke breakage is at the nipple, head, or bend, rims crack at the nipple, and hub flanges break, straight gauge spokes are addling material where it is actually counterproductive for spoke, rim and hub longevity.
    Do the math.

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