[DIRTWRKS]

Hi,

I know there are a number of programs on the net to help one calculate the proper spoke length for a given rim / hub combination etc.

My question is:
How is a spoke physically measured for it's length?
On the rim side does one start at the very tip or where the threads end? and at the hub end is it measured from the edge or the middle of the flared end?

 

[kidwoo]

There's actually a ruler looking think specifically for measuring spokes. If they're the typical j end variety, you hang the curved end in a slot and let the threaded end hang over the tick marks on what looks like a ruler.

Go ahead and do your calculations and take the numbers to a bike shop. Get them to show you the spoke ruler when you buy your spokes. Get them to check your calculations too to make sure you measured your hub in the right places if you measured yourself.

 

[Repack]

It looks something like this. The bend hangs from the hole...

 

[oldfart]

Spokes are measured from the elbow to the very end. I don't think it matters whether you use the centre of the spoke, inside or outside as the difference is only 2mm or less. I'd use center of the material if measuring with a ruler or tape measure. The spoke guage works best.

 

[Repack]

Originally posted by oldfart
Spokes are measured from the elbow to the very end. I don't think it matters whether you use the centre of the spoke, inside or outside as the difference is only 2mm or less. I'd use center of the material if measuring with a ruler or tape measure. The spoke guage works best.

Having built dozens (hundreds?) of wheels, I can say that 1 or 2mm does make a difference. When you can count on all the spokjes being the correct (same) length, it makes the tensioning process much faster, easier, and more accurate. Especially true for rear wheels. It makes maintaining the correct dish throughout the building process much easier.