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Spoke Length Double Check

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Old 01-06-10 | 04:51 PM
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Bikes: 91 bridgestone rb-2, Univega viva sport, 04 masi Nouva Strada,Dave Scott Ironman, Changes like every month

Spoke Length Double Check

Formulas to open pro, 3 cross, I got 296mm does that work out to you guys?
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Old 01-06-10 | 05:02 PM
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What ERD did you use?

I used 605 when I built to WI hubs, and they were just poking through the tops of the nipples, AKA, just a bit long. Mavic advertises nipple seat diameter at 602, so they tell you to add 3mm for the ERD.

If I built them over again I'd build using an ERD of 603.
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Old 01-06-10 | 05:09 PM
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Okay so when you're using a spokcalc its (for 700c) 622- the diameter of your rim right?
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Old 01-06-10 | 05:18 PM
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Give me the formula hub specs (c-f, flange diameter) and let me see what I come up with.
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Old 01-06-10 | 05:53 PM
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62 flange diameter 31.0 cf 120 old
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Old 01-06-10 | 06:53 PM
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yeah using a 602 I got 290,
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Old 01-06-10 | 07:56 PM
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does [I]that [I]seem correct?
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Old 01-06-10 | 08:40 PM
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I am getting 292mm on ( https://lenni.info/edd/ )

Complete wheel data

Hub

  • Formula - flip/flop
  • Right flange ĝ: 62
  • Left flange ĝ: 62
  • Centre to right flange: 31.8
  • Centre to left flange: 31.8
  • Spoke hole ĝ: 2.7

Rim

  • Mavic Open Pro (ERD is Mavic's Nipple Seat Dia + 3mm for nipples)
  • Effective rim ĝ: 605
  • Offset spoke bed: 0

Spoke length
for 32 spokes


Crosses Right Left Tension L/R
0 272 272 100%
1 274.6 274.6 100%
2 281.9 281.9 100%
3 292.4 292.4 100%
4 304.4 304.4 100%

Last edited by Tomo_Ishi; 01-06-10 at 08:47 PM.
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Old 01-07-10 | 02:44 AM
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How many spokes are you using....?
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Old 01-07-10 | 08:26 PM
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32, Thanks Tomo_ishi. I've been getting varied numbers. But thats the answer thats come up most. I might try and stretch it with 294 because I can get DT competitions in that size for a nice price
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Old 01-08-10 | 09:18 AM
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the cheapest I found so far is 88 cents for both spoke and nipple @ wheelbuilder.com
https://www.wheelbuilder.com/store/dt...ted-spoke.html

if u know any cheaper ones, plz share
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Old 01-08-10 | 11:49 AM
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Why use a spoke that's too long for the build to save a few extra dollars?

Buy your spokes at 292mm if you want to do it right. You'll run out of thread if the spokes are too long, and as I mentioned already, using an ERD of 605 will put that spoke right through the top of the nipple; 292mm is already on the longer side.
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