Coker Frame Demensions?

I have built a custom coker frame and several muni and trials frames and
it really helps to have a wheel first to build a frame to. To get it
straight and centered and to get the brake mounts if any in the right
place build your wheel first. you can get close enough for ordering
materials by knowing the size of wheel half of 36" is 18" then give
yourself some extra for the crown. If you are building a custom frame I
wouldn't use the stock seatpost size which is 22.2mm or 7/8" I would use
25.4 or 1" or 27.2mm. If you havent built a frame before I would
recomend useing cromoly steel which is much easier to work with and is
plenty strong. If you already have someone who fabricates with Ti like
a relative or good friend great but otherwise it's going to be a very
expensive frame.

--
Tellurider
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Tellurider said:

I have built a custom coker frame and several muni and trials frames and
it really helps to have a wheel first to build a frame to. To get it
straight and centered and to get the brake mounts if any in the right
place build your wheel first. you can get close enough for ordering
materials by knowing the size of wheel half of 36" is 18" then give
yourself some extra for the crown. If you are building a custom frame I
wouldn't use the stock seatpost size which is 22.2mm or 7/8" I would use
25.4 or 1" or 27.2mm. If you havent built a frame before I would
recomend useing cromoly steel which is much easier to work with and is
plenty strong. If you already have someone who fabricates with Ti like
a relative or good friend great but otherwise it's going to be a very
expensive frame.

I figured it would cost about 120 dollars for 5 feet of Ti tubing and
thank you for the tips.... I haven't built a frame yet or puchased a
wheel set yet...

--
Ducttape

Uniman is in Issue #'8' (http://tinyurl.com/oq8yk)
mycellnumberareacode>(503) 989 5360, turned off

sparrowhawk said:

ive been dreaming for years of the prediction made by the gods written
on the scrolls of Korteweg that i will be in a signature on a odd
invention made by man himself.....oh you can dream....you can
dream🙄

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Ducttape said:

Also, if you have any pet peeves about features of the Coker frame that
should be improved/changed/fixed... I'd like to hear that. too!

A frame with a rounded crown is best for a Coker. You don't need a
flat crown. A rounded crown is narrower. Flat crowns tend to be wider
and can end up rubbing your upper thigh as you ride. It's a factor for
some people, particularly those with shorter or fatter legs.

The Hunter 36" frame is a nice design for a Coker frame. Rounded crown
and the frame is stiff. I wonder how well that frame design would work
in titanium?

Pay particular attention to the bearing holders on the frame. You want
quality bearing holders that hold the bearing securely. The cheap
stamped metal bearing holders, like on the stock Coker frame, can (and
will) wiggle on the bearings which translates into noticeable frame
flex and wiggliness. You want machined bearing holders similar in
style to the bearing holders on the KH unicycles or the Hunter
unicycles.

And make it to fit the extra wide Unicycle.com hub rather than the
standard width unicycle hubs. The wider hub makes for a stronger and
stiffer wheel.

The stock Coker frame uses a 22.2 mm seatpost. I would suggest using
something with a larger diameter. 25.4mm or 27.2mm are good sizes and
there are regular unicycle seatposts available in those sizes. Larger
diameter seatposts clamp more securely (less likely to twist or slip).
Make sure the neck of the frame fits the seatpost without any slop. It
may be difficult to find tubing with the right ID for the seatpost.

--
john_childs

john_childs (att) hotmail (dott) com
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john_childs said:

A frame with a rounded crown is best for a Coker. You don't need a flat
crown. A rounded crown is narrower. Flat crowns tend to be wider and
can end up rubbing your upper thigh as you ride. It's a factor for
some people, particularly those with shorter or fatter legs.

The Hunter 36" frame is a nice design for a Coker frame. Rounded crown
and the frame is stiff. I wonder how well that frame design would work
in titanium?

Pay particular attention to the bearing holders on the frame. You want
quality bearing holders that hold the bearing securely. The cheap
stamped metal bearing holders, like on the stock Coker frame, can (and
will) wiggle on the bearings which translates into noticeable frame
flex and wiggliness. You want machined bearing holders similar in
style to the bearing holders on the KH unicycles or the Hunter
unicycles.

And make it to fit the extra wide Unicycle.com hub rather than the
standard width unicycle hubs. The wider hub makes for a stronger and
stiffer wheel.

The stock Coker frame uses a 22.2 mm seatpost. I would suggest using
something with a larger diameter. 25.4mm or 27.2mm are good sizes and
there are regular unicycle seatposts available in those sizes. Larger
diameter seatposts clamp more securely (less likely to twist or slip).
Make sure the neck of the frame fits the seatpost without any slop. It
may be difficult to find tubing with the right ID for the seatpost.

I need to get the money first but I'll keep that in mind

--
Ducttape

Uniman is in Issue #'8' (http://tinyurl.com/oq8yk)
mycellnumberareacode>(503) 989 5360, turned off

sparrowhawk said:

ive been dreaming for years of the prediction made by the gods written
on the scrolls of Korteweg that i will be in a signature on a odd
invention made by man himself.....oh you can dream....you can
dream🙄

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Think about whether you want to accommodate a extra wide hub (which lots
of people prefer) or not. The stock coker does not have this, which
supposedly results in more wheel flex (but, for some, the ability to
ride faster).

--
mark williamson

Dave: Just a question. What use is a unicyle with no seat? And no
pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!
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All this advice is great and I'll have to keep it in mind when I get the
money.....

--
Ducttape

Uniman is in Issue #'8' (http://tinyurl.com/oq8yk)
mycellnumberareacode>(503) 989 5360, turned off

sparrowhawk said:

ive been dreaming for years of the prediction made by the gods written
on the scrolls of Korteweg that i will be in a signature on a odd
invention made by man himself.....oh you can dream....you can
dream🙄

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Just be carefull with those demented fram demensions. I would suggest
using regular DIMENSION :P :P

Ducttape said:

This is a request to you Coker owners:

I want to build a titanium Coker frame, but I don't want to buy a
standard Coker frame first, so...

Could you please let me know the current critical dimensions of the
standard Coker frame?

* inside distance between forks, both at the crown and at the bearing
holders... if it's different
* space between inside bottom of crown and top of tyre/tire
* length of seatpost tube
*how long the total amount of tubung is so I can buy a long enough
amount

Oh, yeah... what's the inside diameter of a standard Coker's seatpost
tube...

Also, if you have any pet peeves about features of the Coker frame that
should be improved/changed/fixed... I'd like to hear that. too!

--
Ducttape

Uniman is in Issue #'8' (http://tinyurl.com/oq8yk)
mycellnumberareacode>(503) 989 5360, turned off

sparrowhawk said:

ive been dreaming for years of the prediction made by the gods written
on the scrolls of Korteweg that i will be in a signature on a odd
invention made by man himself.....oh you can dream....you can
dream🙄

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Ducttape said:

I figured it would cost about 120 dollars for 5 feet of Ti tubing and
thank you for the tips.... I haven't built a frame yet or puchased a
wheel set yet...

It's not so much the material cost it's the dificulty working with
titanium it's not something you can usualy do yourself unless you have
access to a shop that works with Titanium. There have been other
threads about titanium unicycles where you could get more specific
details but it requires an oxegen free environment to weld it and it is
very dificult to cut, bend, drill, or work in any other way. That's why
things made from it are so expensive.

--
Tellurider
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I found a guy who will give me a quote on a custom Titanium Unicycle
fame, but I need to get his a drawing and measurements.... would
someone be able to come up with a CAD drawing of a Unicycle frame
similar to a hunter cycle frame.... with the measurements..... thank
you....

--
Ducttape

Uniman is in Issue #'8' (http://tinyurl.com/oq8yk)
mycellnumberareacode>(503) 989 5360, turned off

sparrowhawk said:

ive been dreaming for years of the prediction made by the gods written
on the scrolls of Korteweg that i will be in a signature on a odd
invention made by man himself.....oh you can dream....you can
dream🙄

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i can give you what you need if you give me what you want

--
unicyclepa

www.unicyclepa.com
we suck
but its all good
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