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I'm measuring an average of 532.5 according to the wheelpro measuring method (spokes flush with bottom of driver flat in nipples.
Sticker says 540, others elsewhere on the net say 539 or 541. Why am I so far out? Is Musson's measuring method different to others and does it give different results particular to the wheelpro spoke length calculator?
Or do I need a new ruler?
Thanks.
His method works for me, not sure why the difference though.
Are they 29er rims?
Try asking Peterpoddy of this parish. He built my Crests and noticed something with the stickers being wrong. My memory is clouded but I seem to remember Stans saying they had used the stickers from 26er rims by mistake
surely the measured ERD would be higher than the sticker one if that were the case?
I remember that, gaz. These are 26" rims, though.
yeah, wwaswas, there's only 7 or 8mm in it.
spokes flush with bottom of driver flat in nipples.
that sounds off. they need to be level with the mating face.
an alternative is to take an old spoke. glue the nipple on and cut it off at a round length; eg 200 mm
OK, what's the mating face?
I've only got 2 spare spokes, and thought I may as well keep them intact.
2 spokes with tape marking 210mm, threaded into holes, nipples on so spoke ends are flush with the bottom of the driver flats. Left hand finger and thumb on J bends, making sure the spokes are in line, right hand operating the ruler, right eye squinted shut, tongue poking out of left corner of mouth. Measured 4 or 5 times around both rims, all measurements between 112mm and 113mm. then [i]I[/i] did the Math.
Just checked the latest version of the wheelpro book, mine was old. He's got some fandangly elastic thing in there now, but the basics are the same, including
...spoke end is flush with the bottom of the slot.
Ho, ho.
I did the measuring last night but thought I'd post this morning for the increased chance of replies. I did think this morning that I would have liked to check once more.
Ahem.
I can't read, or count, or add up.
There I said it.
To get the excuses out of the way, I'm blaming him:
[img] 
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and this:
[img] 
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It never fails to surprise me how persistent some assumptions can be the face of visual evidence to the contrary. I knew it would be a bit more than 10cms, I read "12" and added that up to 112. There were even 2 little check markers to show that the last digit was a 2.
I did this LOADS of times. (while drinking rum and watching Sherlock, admittedly)
At no point, until I got back this evening and had another look, did I challenge the assumption that the the big "12" and the other 2 markers might not mean 112.
🙄
Shouldn't the two spokes be 200mm?
doesn't matter, you're measuring the remainder and adding them all up anyway, 210+210+122 = 200+200+142.
That's assuming you can add up and read a ruler, though.