Spoke Length Double Check
 

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?

I am getting 292mm on ( http://lenni.info/edd/ )

Complete wheel data

Hub

• 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

Rim

• Mavic Open Pro (ERD is Mavic's Nipple Seat Dia + 3mm for nipples)
• Effective rim ø: 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%

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
http://www.wheelbuilder.com/store/dt...ted-spoke.html

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.