gerv 

I don't know how I've never realized this after building several wheels with DT spokes.

But when you buy DT Competition spokes, you usually get nipples with them. I'm suddenly noticing that the size fits a Park 0 wrench (black...3.23mm...,127 inch).

Why do I suddenly noticed this? Because suddenly I am having an issue with rounded spokes on a wheel re-build.

Is this the one?
https://www.google.com/products/catal...ed=0CDUQ8wIwAg

Retro Grouch 

Yup. DT and Wheelsmith nipples take the black wrench. Japanese nipples, which come on most stock bikes take the red one. I can't tell you the sizes, I'm an analog kind of guy. If you're working on a wheel that's had a few spokes replaced, you may find yourself going from one to the other and back.

Here's another one for you. Most DT and Wheelsmith spokes take 14ga nipples. Straight 15 gage spokes take their own (slightly smaller) nipple. The size difference isn't much and a 14ga nipple will actually thread onto a 15ga spoke. It'll thread on but it won't tension. At one shop that I've worked in somebody mixed a few 15ga nipples in a can of 14ga nipples. Grrrr. I wonder if it's the same guy who thought that spokes that were a couple of millimeters different length were close enough to be stored in the same box.

fietsbob

I'm using the red one on a Brompton repair, rear uses 12 gage spokes.

iuse the same black Park wrench on 15 gage spokes ,
the threaded hole is just smaller

HillRider

Right, the Park Size 0 (Black) spoke wrench is the one used for DT and Wheelsmith nipples of any spoke gauge, only the female threaded holes vary, not the wrench flats.

The Park Size 2 (Red) spoke wrench fits older Japanese spoke nipples and I'm not sure even the Japanese are using them anymore.

Park also makes an intermediate Size 1 (Green) wrench that fit Union and a few other European spoke nipples but I believe these aren't made anymore and were never common here.

gerv 

I think I'm currently doing the same thing. For some reason I have a wheel that seems to have spokes needing Red, some Black. Unfortunately, I don't have a black wrench and am using Park's triangular spoke wrench with all three sizes. I have to test each spoke for size.

And... to top it off... the spokes are aluminum, not brass. I believe these ship with the DT Revolutions and I am using them as a replacement.

Retro Grouch 

Not my favorite tool. It's OK of you only have to tension a couple of spokes but, if you have to do very much trueing, the nubs on the other two sizes hurt my fingers.

HillRider

+1 I never liked the universal fit ring-type spoke wrenches for the same reason. The unneeded parts got in the way.

gerv 

Agreed. But having the three spoke types in one tool is great for traveling or touring.

For building a 36 spoke wheel, not ideal. However, currently, I don't have a black spoke wrench.

relyt

The red Spokey is the same size as the black Park wrench and it is very nice.

Al1943

+1
I've not rounded off any nipples since using the red Spokey wrench. I use DT aluminum nipples only.