Help needed: spoke lengths for a misfit wheel build

Howdy folks.

I have a Rolf/Hugi Sestriere 24H rear hub and a 24H Sun Venus rim that
I want to build into a wheel. I got everything cheap and figured it
would be pretty straightforward to just ignore the paired drilling on
the hub and use a normal rim and normal 2x lacing. Well I made some
incorrect assumptions about how spocalc compensates for paired spokes
and I don't think any of the spokes I bought (and now tweaked) are the
right length. It also appears that between the much large non-drive
side flange and paired spoke holes that it isn't possible to get
everything lined up the normal way. I have been told there is a
sophisticated spoke length calculator that can get the correct spoke
lengths for this misfit build, but I don't know what it is. It does
appear that I will need 2 different spoke sizes for the non-drive side
though. Any help with this would be greatly appreciated and I also
need all new spokes (14/15g DT are what I used up front) so any leads
on a good place to buy them would also be helpful.

Thanks in advance,
Doug

On Apr 7, 12:05*pm, " wrote:
Howdy folks.

I have a Rolf/Hugi Sestriere 24H rear hub and a 24H Sun Venus rim that
I want to build into a wheel. *I got everything cheap and figured it
would be pretty straightforward to just ignore the paired drilling on
the hub and use a normal rim and normal 2x lacing. *Well I made some
incorrect assumptions about how spocalc compensates for paired spokes
and I don't think any of the spokes I bought (and now tweaked) are the
right length. *It also appears that between the much large non-drive
side flange and paired spoke holes that it isn't possible to get
everything lined up the normal way. *I have been told there is a
sophisticated spoke length calculator that can get the correct spoke
lengths for this misfit build, but I don't know what it is. *It does
appear that I will need 2 different spoke sizes for the non-drive side
though. *Any help with this would be greatly appreciated and I also
need all new spokes (14/15g DT are what I used up front) so any leads
on a good place to buy them would also be helpful.

Thanks in advance,
Doug

Doug:

You're screwed That's some serious calc-ing you're talking about
there. You might try referring to 'The Bicycle Wheel' which has a
section about calculating spoke length. Don't know how you are going
to deal with the paired hub, equally spaced rim thing tho.

You might try what I did with a buddy's rear wheel that was paired
(Bontrager RAL) that he wanted a Ptap hub in (non-paired). I bought a
buncha cheap 14 ga spokes of a variety of lengths (given your original
failure you should have an idea of the appropriate range that contains
the actual spoke length). Think you can get these for like ~$0.20
per. Use spokes that are too short, but long enough to get into the
nipples a few threads. You don't need to lace the whole thing, but
rather two sets of opposing crossed pairs at 90 degrees to each other
on each side (16 spokes). You'll end up with a cross-like shape, but
this way, you center the hub, tension it up, and measure how far the
ends of the spokes are from the ends of the nipples. Add this
distance to the spoke length and VOILA!

16 x 0.20 = $3.20. Not too bad. Well, there is your time, too, but
if you are any good at this, it shouldn't take more than like 30 - 45
minutes to figure it out.

Or throw it at your LBS's wheel guru along with a six-pack and his
normal fee. Prolly easier

D'ohBoy

In article
,
" wrote:

Howdy folks.

I have a Rolf/Hugi Sestriere 24H rear hub and a 24H Sun Venus rim that
I want to build into a wheel. I got everything cheap and figured it
would be pretty straightforward to just ignore the paired drilling on
the hub and use a normal rim and normal 2x lacing. Well I made some
incorrect assumptions about how spocalc compensates for paired spokes
and I don't think any of the spokes I bought (and now tweaked) are the
right length. It also appears that between the much large non-drive
side flange and paired spoke holes that it isn't possible to get
everything lined up the normal way. I have been told there is a
sophisticated spoke length calculator that can get the correct spoke
lengths for this misfit build, but I don't know what it is. It does
appear that I will need 2 different spoke sizes for the non-drive side
though. Any help with this would be greatly appreciated and I also
need all new spokes (14/15g DT are what I used up front) so any leads
on a good place to buy them would also be helpful.

How is your trigonometry? With the parts in my hand I
would calculate the lengths from first principles, and
buy with confidence. As mentioned, there are formulae in
The_Bicycle_Wheel that will apply. The critical part is
determining the various angles from hub hole to rim hole,
and that requires getting the angles between hub holes,
Accurate measurement is necessary. This is emminently
doable. Try drawing pictures of the hub. Label the angles
you want to determine and how they relate to various
measurements you make on the hub. Look for alternate
schemes, apply both, and compare the results. Good luck.

--
Michael Press

On Apr 7, 12:05*pm, " wrote:
Howdy folks.

I have a Rolf/Hugi Sestriere 24H rear hub and a 24H Sun Venus rim that
I want to build into a wheel. *I got everything cheap and figured it
would be pretty straightforward to just ignore the paired drilling on
the hub and use a normal rim and normal 2x lacing. *Well I made some
incorrect assumptions about how spocalc compensates for paired spokes
and I don't think any of the spokes I bought (and now tweaked) are the
right length. *It also appears that between the much large non-drive
side flange and paired spoke holes that it isn't possible to get
everything lined up the normal way. *I have been told there is a
sophisticated spoke length calculator that can get the correct spoke
lengths for this misfit build, but I don't know what it is. *It does
appear that I will need 2 different spoke sizes for the non-drive side
though. *Any help with this would be greatly appreciated and I also
need all new spokes (14/15g DT are what I used up front) so any leads
on a good place to buy them would also be helpful.

Thanks in advance,
Doug

Ya get that sussed out? How did you approach it - trial and error or
calculation? First try or Plan B?

Just wondering....

D'ohBoy