Building a Coker wheel

See this thread 'Help on Tom Miller Spokes' (http://tinyurl.com/4qukb)
for the numbers if you're getting custom spokes. Don't trust the spoke
calculator for Coker spokes.

You can use the standard length stock Coker spokes with the Airfoil rim
and the wide hub. Just go with a 4 cross instead of a 3 cross and it
magically works.

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Thanks John. Even though you say magic is involved I don't quite
understand. If you choose 4 cross instead of 3 cross wouldn't that call
for longer spokes instead of shorter?

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goldenchicken - Olaf Johansson
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According to the thread on Tom Miller's spokes a 4 cross on airfoil with
wide hub would take 375 mm spokes and a 3 cross 372 mm. That is almost
no difference! Is it because the wheel is so huge or what?

Magic or not. I think I will first measure one of my standard spokes
before rebuilding the wheel. Or has anyone already done that?

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goldenchicken - Olaf Johansson
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goldenchicken said:

*Thanks John. Even though you say magic is involved I don't quite
understand. If you choose 4 cross instead of 3 cross wouldn't that
call for longer spokes instead of shorter? *

The Airfoil rim is a deep section rim so its ERD (Effective Rim
Diameter) is smaller than the ERD of the stock Coker rim. The stock
Coker spokes would be too long for the Airfoil rim if laced 3-cross. It
just happens that the stock Coker spokes will work if laced 4-cross.
That's the magic, or a at least a convenient coincidence.

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\"otherwise we'd just sit around a table and try to agree on what the
fastest time for a 1 hour time trial should be.\" -- john_childs
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john_childs said:

*The Airfoil rim is a deep section rim so its ERD (Effective Rim
Diameter) is smaller than the ERD of the stock Coker rim. *

Ah, yes of course!

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goldenchicken - Olaf Johansson
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I just got my new 36" wheel built and I used the udc wide hub and
airfoil rim and Tommi Miller ss spokes and I ordered them using the
spoke length calculator for three cross, 369mm, 14.5". And guess what
they were the perfect length, the spokes came just to the top of the
nipples, if you use 14-5/8" spokes they are going to stick out past the
nipple and may bottom out on the threads. It won't be a problem that
they stick out a little bit with the airfoil rim because the rim has
such a deep channel that the nipples are deeply recesed, and there may
be enough threads to not bottom out but trust me for three cross 14-1/2"
is the correct length.

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I just built a wheel with the UDC hub and Airfoil rim with 4 cross
spoking. 14-3/4 worked out just right with a lot of spoke tension. I
also used spoke washer on the heads because there was quite a bit of
play in the hub spoke holes.

--
One on one - Geezer Unicyclists Of America

"However, like the jet pilot, if the Coker rider tries to turn too fast,
he/she could black out."
-Memphis Mud

The De Beers people used to say, "Diamonds are Forever." But now their
ad says, "Diamonds Will Render Her Speechless." Why don’t they just
come out and say, "Diamonds--That'll Shut Her Up!"
Ron White - Blue Collar Comedy Tour

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One on one said:

*I just built a wheel with the UDC hub and Airfoil rim with 4 cross
spoking. 14-3/4 worked out just right with a lot of spoke tension. I
also used spoke washer on the heads because there was quite a bit of
play in the hub spoke holes. *

To get the right fit for the airfoil rim you need to get the nipples
from semcycle, they have nipples that are the same size OD as the stock
coker 12 gauge nipples but are threaded for 14 gauge spokes and they fit
the rim holes perfect.

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Tellurider - Dan Wilson

There's a fine line between "Hobby" and "Mental Illness".
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Tellurider said:

*Oops I guess I should read more carefully before replying. You said
hub spoke holes not rim. I thought the spokes worked OK at the hub
even though it is drilled for 12 guage spokes. *

There is quite a bit of play around the spoke at the hub. This will
allow movement of the spokes in the hub causing broken spokes at the
spoke head. The washers tighten everything up nicely.

Information taken from "The Art of Wheelbuilding" by Gerd Schraner

--
One on one - Geezer Unicyclists Of America

"However, like the jet pilot, if the Coker rider tries to turn too fast,
he/she could black out."
-Memphis Mud

The De Beers people used to say, "Diamonds are Forever." But now their
ad says, "Diamonds Will Render Her Speechless." Why don’t they just
come out and say, "Diamonds--That'll Shut Her Up!"
Ron White - Blue Collar Comedy Tour

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are the washers like standard washers or are they a sleeve to make the
spokes a larger gauge?

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There's a fine line between "Hobby" and "Mental Illness".
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They are tiny brass washers that just fit over the spoke. Once the wheel
is laced, you will have to tap the spoke heads into the washer and hub
using a special pin punch with a concave surface that fits over the
spoke head.

I made mine from a Craftsman punch using a dremel tool and grinding
stone attachment to recreate the shape of the spoke head into the end of
the punch. You can also purchase a spoke head punch for @ $14.00

You can get the washers from Bike Tools Etc. They are online. A bag of
100 is $2.50 plus $6.00 shipping.

http://tinyurl.com/3zkzs

--
One on one - Geezer Unicyclists Of America

"However, like the jet pilot, if the Coker rider tries to turn too fast,
he/she could black out."
-Memphis Mud

The De Beers people used to say, "Diamonds are Forever." But now their
ad says, "Diamonds Will Render Her Speechless." Why don’t they just
come out and say, "Diamonds--That'll Shut Her Up!"
Ron White - Blue Collar Comedy Tour

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Ah yes I saw your pictures in your DIY coker thread, so the washers are
thin flat brass washers and then you tap them with a punch to set them
in. It looks nice but I think I will stick with what I have, the spoke
heads are cone shaped and set into the holes without them and if they
are kept tight I think it will be allright. But definitly better with. I
am building my own frame and useing the same type bearing holders as GB
uses they are called split shaft collars, I bought ones that fit 35mm
bearings and am having them machined to fit 40mm bearings leaving a lip.

--
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There's a fine line between "Hobby" and "Mental Illness".
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