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  1. #1
    如果你能讀了這個你講中文 genericbikedude's Avatar
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    Spoke calc seems off

    I'm getting ready to buy another rim and spokes to replace my back wheel on my rain bike, so I plugged the numbers into the spokecalc spreadsheet on SB's website, and I got 299.2 and 297.8. I haven't built a dished wheel in a while, and the difference seems awfully small. Am I, as the kids say, "trippin?"

    Its a LX (FHM570), and a CR18.

    Thanks!

  2. #2
    Klaatu barada nikto cascade168's Avatar
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    Quote Originally Posted by genericbikedude
    I'm getting ready to buy another rim and spokes to replace my back wheel on my rain bike, so I plugged the numbers into the spokecalc spreadsheet on SB's website, and I got 299.2 and 297.8. I haven't built a dished wheel in a while, and the difference seems awfully small. Am I, as the kids say, "trippin?"

    Its a LX (FHM570), and a CR18.

    Thanks!
    Rear wheels are frequently only 1 or 2mm different, from side to side spoke lenght. I'd say that the majority of wheels I have built have had a 2mm difference.

    SpoCalc been very, very good to me ;-)
    "Work is the curse of the drinking class."
    - Oscar Wilde

  3. #3
    Pro wheelbuilder UK
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    With spokecalc always round down. So use 299 on left and 297 on drive side.

  4. #4
    The Red Lantern Rev.Chuck's Avatar
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    Sounds about right for a shimano hub and road wheel to me. Spoke difference seems about right.
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    I am in the woods and I have gone crazy.

  5. #5
    JRA...
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    i built the same combo, and while i don't remember the exact length, it was close enough i just used one length.

  6. #6
    Senior Member
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    Quote Originally Posted by wrench
    With spokecalc always round down. So use 299 on left and 297 on drive side.
    That's a good rule for other spoke length calculators also. Better to be slightly short than slightly long (when talking spokes ).

    Al

  7. #7
    Easy like Sunday morning white lobster's Avatar
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    Quote Originally Posted by Al1943
    That's a good rule for other spoke length calculators also. Better to be slightly short than slightly long (when talking spokes ).
    Really? Depends on the rim and depends on the calculator, I guess. With double walled rims, there's absolutely nothing wrong with being a touch long, and I'd rather have a little bit of spoke sticking out of the top of the nipple than have threads showing.

    Personally, I think that if the spoke calculator is written so that the spoke end comes out right at the bottom of the nipple slot (like Bike-alog's Spokemaster), I'm always going to round up.

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