Gotte

Not sure if this is the right forum, but figure there might be someone out there who's done what I want to.
I've got an old touring bike that presently runs a 700c, 7 speed derailieur back wheel. I want to swap it out for a 700c, 3 speed Sturmey Archer hub, so I can fit an old style chaincase and turn it into a town cruiser of the raleigh variety (but with alloy rims for better braking - 700c to fit the frame, obviously). I've got the hub, 36 hole. I can get the rim, but I'm not sure about spoke length and axle diameter.
I've rebuilt a wheel or two in my time, but never from scratch. I seem to remember reading something about issues with flanges on SA hubs being narrower, and needing spacing for the elbow of the spokes.
Also, anyone know spoke-lengths for correct offset, and which is the best lacing pattern to use?

Many thanks

Old Fat Guy

Try here:
https://lenni.info/edd/

Gotte

Many thanks for that.

nlerner

Spocalc has S-A 3-speed hubs in its database, as well as lots of rims (though I'd still measure the ERD of the rim to be sure). Traditional Raleigh Sports rear wheels are laced 4x, but if you're not a heavyweight, 3x will be fine. FWIW, I've never used washers to reinforce the flange as is recommended, and I have yet to break a spoke or flange on one of those wheels, but I haven't necessarily subjected them to lots of stress or weight (I'm 160 lbs).

Neal

flammenwurfer

I'm planning and getting ready to do exactly what you're proposing right now as well. I pretty much have my plan formulated, I just need to order the supplies and get to work.

What I'm going to use.
Sun Cr18 700C rims
~290mm stainless steel spokes

Some people have told me to get shorter spokes than the calculator says, but I'm not sure how much shorter to get.

Zaphod Beeblebrox 

don't go more than 1 size less than spocalc recommends. If Spocalc says you need 289mm, go with a 288mm rather than a 290mm (because they don't sell 289mm)

If the spoke is too long and you bottom it out you've got nowhere left to go.

Gotte

Thanks for that. Can you tell me exactly how to measure the ERD, hopefully without the specific tool?

Bianchigirll 

Hello sounds like a fun project. you frame does have horisontal dropouts yes?

nlerner

I used a yardstick, but I've read of accurate measurements by knotting the end of a string, running that string through a spoke hole such that the knot doesn't go through, and then marking the point on the string that reaches to the rim surface on the opposite edge of where you started. Then, measure the string from knot to mark.

Neal