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Old 06-17-09, 12:24 PM   #1
epon
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Spoke Length for Deep V and Rear 6500 Ultegra Hub

I used the spoke calc and I get 284.6 for the left side and 282.7 for the right side on a 32 hole 3 cross build. I'm guessing I need to be looking for 285mm and 283mm? I'm around 200 lbs and carry a pannier. I'm guessing the DT comps in 2.0,1.8,2.0 would be a solid choice. The best price I can find is $23.50 shipped for 18 black with nipples.

Thanks in advance

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Old 06-17-09, 01:01 PM   #2
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no, you need to go shorter. 284mm and 282mm

spokes stretch and rims compress.
just an idea, but you might want to try 2.0/1.8/2.0 comps on the right and 2.0/1.5/2.0 revos on the left which will allow the left side to stretch more and result in a more durable wheel.

if you use revo spokes, DT spoke calc will recommend 1mm shorter than comp.
in which case it would be 282mm comp and 283mm revo
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Old 06-17-09, 01:04 PM   #3
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Assuming your calculations are correct, go with 282 and 284. Always round down to avoid running out of spoke threads. DT Swiss Competition spokes are a good choice. I suggest that you try using the DT Swiss spoke length calculator.
Edit: I would not use Revolutions on the drive side rear. They'll stretch too much. Revolutions would be fine on the non-drive side or on the front wheel.

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Old 06-17-09, 02:30 PM   #4
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Each time I try and use the DT spoke Calc when I try to select a drop down item I am forwarded to the german version of the page. Done with that. Im using spocalc.xls by Damon Rinard. Thanks for the info DT Comps in 282mm and 284mm it is.
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Old 06-17-09, 04:29 PM   #5
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no, you need to go shorter. 284mm and 282mm

spokes stretch and rims compress.
just an idea, but you might want to try 2.0/1.8/2.0 comps on the right and 2.0/1.5/2.0 revos on the left which will allow the left side to stretch more and result in a more durable wheel.

if you use revo spokes, DT spoke calc will recommend 1mm shorter than comp.
in which case it would be 282mm comp and 283mm revo
AEO's spoke sizes given above ARE EXACTLY CORRECT!!! 284mm and 282mm assuming 2.0 heads. Use at least 12mm nipples...14mm would be better.

But however...I question why you are using Velocity DeepV's for a set of road wheels?

Are you going just for faddish looks...or performance...? Velocity DeepV's are extraordinarily heavy rims...and offer absolutely no performance benefit over Mavic CXP-33's for example. If you are going for performance - welp your resulting wheels will be tank wheels.


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Old 06-17-09, 04:33 PM   #6
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For those who need to know...

ERD for Velocity DeepV's is a minimum of 581mm and a maximum of 582. Do not use 580mm as you think you are measuring because Velocity uses something similar to what Campy used back in the late 80s/early 90s to create the joint resulting in an additional 1mm of material at one or both holes to either side of the joint.

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Old 06-17-09, 04:36 PM   #7
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I guess I'm in information mode today... =8-)

If you are going to do a lot of Velocity DeepV's like I do...buy yourself a 32 color set of Sharpies. Finish damage tends to occur at the holes near the joint - the Sharpies come in very handy.

=8-)
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Old 06-17-09, 05:04 PM   #8
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Damon Rinard's spocalc is exactly correct. Meaning the end of the spoke will be just at the inside of the rim, with some threads left over.

Mavic's spoke calculator adds a couple of mm, which gets the spoke to the end of the nipple.

I guess what I'm saying is that you can round up or down a little bit with Rinard's spocalc with no problem...I've done it before and it's worked great. In fact, with spocalc I'll just round in the nearest direction and it always works out fine.
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Old 06-17-09, 05:30 PM   #9
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Quote:
Originally Posted by mrrabbit View Post
For those who need to know...

ERD for Velocity DeepV's is a minimum of 581mm and a maximum of 582. Do not use 580mm as you think you are measuring because Velocity uses something similar to what Campy used back in the late 80s/early 90s to create the joint resulting in an additional 1mm of material at one or both holes to either side of the joint.

=8-)
This nailed me on my first Aerohead build. I usually just take all the spokes to the bottom of the threads and add equal turns from there as I tension up. The tension around the joint was all wrong. Finally figured out there was a thick piece of metal in there.
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Old 06-17-09, 07:37 PM   #10
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Originally Posted by mrrabbit View Post
AEO's spoke sizes given above ARE EXACTLY CORRECT!!! 284mm and 282mm assuming 2.0 heads. Use at least 12mm nipples...14mm would be better.

But however...I question why you are using Velocity DeepV's for a set of road wheels?

Are you going just for faddish looks...or performance...? Velocity DeepV's are extraordinarily heavy rims...and offer absolutely no performance benefit over Mavic CXP-33's for example. If you are going for performance - welp your resulting wheels will be tank wheels.


=8-)
It's for my 4 season commuter carrying ~200 lbs and panniers plus I just like them. I also cross nasty railroad tracks 2x daily.

Thanks for the help all !
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