help with spoke length

[orbeaorca]

I need some help with calculating the spoke length i will need to build my 32 hole powertap over into AC350 rim as my dt rim is damaged.

I currrently have a two crosslaced pattern. I cant seem to get the spoke calculator to work.

[Johan Bornman]

In order for us to give you a spoke length, you have to tell us how many spoke crossings you're building with and what the rim's ERD is.

 

I have the Powertap dimensions on hand.

 

 

[orbeaorca]

THe ERD 590. It will be built with each spoke crossing two others.

Thanx johan 

[Johan Bornman]

Here are your nominal lengths. Make sure you round down by approximately 2mm.

 

Left: 272.0mm

 

Right 270.7mm

 

In other words, Left 270, Right 268

Johan Bornman2009-08-29 05:51:48

[orbeaorca]

THANKS Johan for the trouble. Would the spoke length remain the same if i use sapim cx ray spokes with 14mm nipples? does the 14mm nipples vs 12 mm affect the spoke length?

 

On american classic website they say the length of the spoke for the AC420 is 273 but if you not using their nipples then you must take off two which would make it 271mm  which i cant seem to find.

 

 

 

If i were to use the same cx ray spokes what size would i order 270 or 272 if i wanted to respoke my standard american classic 420 wheel?

 

when i used the spoke calc i get l=271.4 and r=270.5

 

420 rim erd = 572

 

american classic hub  specs

diameter=66    c/right =30       c/left= 20

24 hole and 2 cross pattern

 

 

orbeaorca2009-08-31 11:40:04

[Johan Bornman]

The 12mm and 14mm nipples require the same spoke length. It is only the blank bore of the nipple that's longer.

 

You cannot compensate for too-short spokes with longer nipples.

 

American Classic wheels use a proprietary nipple that has a little threaded tower that protrudes above the nipple head and that requires a longer spoke. Stupid concept. If you repair AC wheels with standard spokes, you go back to standard lenghs. If you are re-building with an AC rim, you ignore all the AC - 3mm nonsense.

 

Spoke lengths remain the same, no matter what type of spoke you use. CX-Ray included.

 

I don't understand the last three lines of your post.  Are you now using a different hub and rim?

 

 

 

 

 

 

[orbeaorca]

Hi johan

I also want to respoke my 420 rear wheel with new spokes hence specs of th AC rear hub.

I am trying to work out what length spokes I should get 2 do this

 

[Johan Bornman]

Hi johan

I also want to respoke my 420 rear wheel with new spokes hence specs of th AC rear hub.

I am trying to work out what length spokes I should get 2 do this

 

 

Nominal length will be

270.5

271.5

 

 

Therefore, find 268 and 269

 

or

 

Just get 269 for both sides. Don't re-use the AC nipples.

 

I assumed 2.4mm for the spoke hole size.

 

 

[orbeaorca]

cant get get 269 would 268 and 270 work instead?

[Johan Bornman]

Yes, it'll be fine.