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  1. #1
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    Inconsistent Spoke Calculations WTF!

    Hi Gang. Got the Fat bike bug, and decided to build a custom Moonlander.

    Spoke lengths are driving me nuts.
    I'm running a Hope Fatsno front hub, and Hope Pro-2 135mm on the back, of Surly Clown-shoe rims. 32 spokes, 3 cross.

    I guessed, then quicky laced 270mm spokes (too long), then 258mm (too short), then 268 (still too long), so I reckon 264 to be the ticket.

    To confirm my guess, I went online to use some accurate calculators, rather than my guess work.

    Here is the frustrating part. The web-based calculators give different answers, with the same data imputed, based on the front wheel.

    Inconsistent Spoke Calculations  WTF!-le.264.7-ri.266.1.jpg

    Inconsistent Spoke Calculations  WTF!-le.263-ri.263.8.jpg

    Inconsistent Spoke Calculations  WTF!-le.267.7-ri.263.7.jpg

    Inconsistent Spoke Calculations  WTF!-le.268-ri.268.jpg

    My question: Which is right? Or, should I go with my guess?

  2. #2
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    Inconsistent Spoke Calculations WTF!

    Quote Originally Posted by tridentcycleworks View Post
    Hi Gang. Got the Fat bike bug, and decided to build a custom Moonlander.

    Spoke lengths are driving me nuts.
    I'm running a Hope Fatsno front hub, and Hope Pro-2 135mm on the back, of Surly Clown-shoe rims. 32 spokes, 3 cross.

    I guessed, then quicky laced 270mm spokes (too long), then 258mm (too short), then 268 (still too long), so I reckon 264 to be the ticket.

    To confirm my guess, I went online to use some accurate calculators, rather than my guess work.

    Here is the frustrating part. The web-based calculators give different answers, with the same data imputed, based on the front wheel.

    Click image for larger version. 

Name:	LE.264.7-RI.266.1.JPG 
Views:	144 
Size:	160.9 KB 
ID:	803465

    Click image for larger version. 

Name:	LE.263-RI.263.8.JPG 
Views:	134 
Size:	152.1 KB 
ID:	803466

    Click image for larger version. 

Name:	LE.267.7-RI.263.7.JPG 
Views:	114 
Size:	144.5 KB 
ID:	803467

    Click image for larger version. 

Name:	LE.268-RI.268.JPG 
Views:	145 
Size:	157.4 KB 
ID:	803468

    My question: Which is right? Or, should I go with my guess?
    Use the calculator you have experience with and trust and ignore the others.

    You have different data entered in at least two of those above.
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  3. #3
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  4. #4
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    Quote Originally Posted by shiggy View Post
    You have different data entered in at least two of those above.
    Only thing different was one had rim thickness. What are you refering to?

  5. #5
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    Quote Originally Posted by nvphatty View Post
    263
    Thanx.

  6. #6
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    Inconsistent Spoke Calculations WTF!

    Quote Originally Posted by tridentcycleworks View Post
    Only thing different was one had rim thickness. What are you refering to?
    Not just rim thickness.

    And another does not have spoke offset.
    mtbtires.com
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  7. #7
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    Well there might be a type-o when I went back to the different calculators, to quickly get screen pics. When originally done, all info was the same.

  8. #8
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    Inconsistent Spoke Calculations WTF!

    Quote Originally Posted by tridentcycleworks View Post
    Well there might be a type-o when I went back to the different calculators, to quickly get screen pics. When originally done, all info was the same.
    That is not the problem.
    mtbtires.com
    The trouble with common sense is it is no longer common

  9. #9
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    Care to enlighten?

  10. #10
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    Inconsistent Spoke Calculations WTF!

    Quote Originally Posted by tridentcycleworks View Post
    Care to enlighten?
    You need to learn what the calculator is actually asking for.
    GIGO
    mtbtires.com
    The trouble with common sense is it is no longer common

  11. #11
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    Specifically?

  12. #12
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    Inconsistent Spoke Calculations WTF!

    Quote Originally Posted by tridentcycleworks View Post
    Specifically?
    You need to work it out for yourself. It is not difficult.
    mtbtires.com
    The trouble with common sense is it is no longer common

  13. #13
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    The fact I asked the question to you to specify...

  14. #14
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    Inconsistent Spoke Calculations WTF!

    Quote Originally Posted by tridentcycleworks View Post
    The fact I asked the question to you to specify...
    What does THAT mean?

    Go look that those calculators again, what are THEY asking for, and ask yourself why you would enter the same data in each of them?
    mtbtires.com
    The trouble with common sense is it is no longer common

  15. #15
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    i just used on of them called freespoke you seem to have in there, i built lefty front wheel with clown shoe front and only using one side of the spoke bed heaps of offset,

    and rear was project 321 hub with one side spoke bed again and free spoke was spot on with the length is was so happy cause eyes sometimes you get a bum steer.

  16. #16
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    Re: Inconsistent Spoke Calculations WTF!

    Quote Originally Posted by BELROSE BICYCLES View Post
    i just used on of them called freespoke you seem to have in there, i built lefty front wheel with clown shoe front and only using one side of the spoke bed heaps of offset,

    and rear was project 321 hub with one side spoke bed again and free spoke was spot on with the length is was so happy cause eyes sometimes you get a bum steer.
    Got any pics? I need to do this, but it looks like the offset will be huge? Did you use a pug offset tool? Just be nice too see how it came out

  17. #17
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    I've built a few sets of Rolling Darryls on Hope Fatsos, 907 and Salsa hubs. All centered. They all used 263. One Marge Lite and one Clownshoe, 263 also.
    I like turtles

  18. #18
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    Quote Originally Posted by rustybkr View Post
    Got any pics? I need to do this, but it looks like the offset will be huge? Did you use a pug offset tool? Just be nice too see how it came out
    yep i used the 17.5mm pug adaptor front for lefty.,and the moonlander rear 28mm adaptor
    Attached Thumbnails Attached Thumbnails Inconsistent Spoke Calculations  WTF!-img_5558.jpg  


  19. #19
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    Re: Inconsistent Spoke Calculations WTF!

    Awesome! Thanks...

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