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Accuracy of spocalc/wheelcalc vs Solidworks?

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Accuracy of spocalc/wheelcalc vs Solidworks?

Old 06-07-11, 11:05 PM
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tim00gle
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Accuracy of spocalc/wheelcalc vs Solidworks?

So I'm about to build a wheel and need to determine the lengths of spokes I need. I tried out spocalc and wheelcalc, and both agreed with each other (factoring in spoke tension)

Then I took advantage of my access to Solidworks, and drew up a sketch of the lacing...

The rear hub on on Solidworks agrees with spocalc/wheelcalc, but Solidworks calls for spokes on the front wheel that are ~0.8mm shorter than spocalc/wheelcalc. Unfortunately this puts me between two spoke lengths....

I am more inclined to trust Solidworks, but wondering if anyone here has any advice about this.
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Old 06-07-11, 11:10 PM
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Jeff Wills
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I've never had a problem with spoke calculations from Spocalc. 0.8mm isn't that much- in most cases you have 2-3mm leeway on spoke length, more if you use longer nipples or can tolerate a little spoke protrusion.
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Old 06-07-11, 11:16 PM
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Silly me, I found out why there was that discrepancy. Wheelcalc/spocalc are both very accurate. Can a mod delete this thread?

edit: on a related note, the dtswiss spoke calculator appears to be broken...

Last edited by tim00gle; 06-07-11 at 11:20 PM.
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Old 06-08-11, 01:56 AM
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https://www.mrrabbit.net/wheelsbyflemingapplications.php

Another spoke calculator...grab the spreadsheet...

=8-)
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