Singlespeed & Fixed Gear - Spoke Length Double Check
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Formulas to open pro, 3 cross, I got 296mm does that work out to you guys?
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.
Okay so when you're using a spokcalc its (for 700c) 622- the diameter of your rim right?
Give me the formula hub specs (c-f, flange diameter) and let me see what I come up with.
62 flange diameter 31.0 cf 120 old
yeah using a 602 I got 290,
does [I]that [I]seem correct?
01-06-10, 07:40 PM
I am getting 292mm on ( http://lenni.info/edd/ )
Complete wheel data
Formula - flip/flop
Right flange ø: 62
Left flange ø: 62
Centre to right flange: 31.8
Centre to left flange: 31.8
Spoke hole ø: 2.7
Mavic Open Pro (ERD is Mavic's Nipple Seat Dia + 3mm for nipples)
Effective rim ø: 605
Offset spoke bed: 0
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%
01-07-10, 01:44 AM
How many spokes are you using....?
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
the cheapest I found so far is 88 cents for both spoke and nipple @ wheelbuilder.com
if u know any cheaper ones, plz share :)
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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