Torker Airsaddle on KH

fluffinator007 said:

*But my main concern is what seatpost or seat post
accessories im going to need to get the torker seat/seat
post to fit inside the KH seat tube. Has anyone done this
or something similar? Any suggestions? *

shim. use a soda can or similar object to fit the seat post.
the seat post for miyata is smaller than kh.

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Quoted message said:

* I am buying a KH24 and i would like to upgrade the seat
to a airsaddle. I have a miyata style torker saddle from a
torker 24'' i bought about 6 months ago. Can the torker be
converted to an airsaddle the same way a miyata could and
with the same hardware. *

Yes.

Quoted message said:

* And would the GB4 stiffener fit inside it. *

Yes.

Quoted message said:

* But my main concern is what seatpost or seat post
accessories im going to need to get the torker seat/seat
post to fit inside the KH seat tube. Has anyone done this
or something similar? Any suggestions? *

The KH seat tube ID is about 29.0-29.4 mm which is HUGE
compared to the standard Miyata 22.2mm. You will have a
hard time, I think finding a shim that will do that for
you; I don't see one in the books I have here. You have
two options:

1. Get a larger seatpost (say, 25.4 or larger if possible)
and use a reasonably-sized shim. The shim that comes
with is a 27.2 - 29.4. Problem Solvers puts out a shim
that takes a 25.4mm post up to 29.4, and another that
takes it up to 29.2. They cost about $7.00 each; order
from your LBS. This solution is okay, but somewhat of a
compromise. uni.com has a 25.4mm GB4 seatpost that you
could use that costs about $20.

2. Get the right size seatpost. The KH seat tube is a
really odd size and there aren't many seatposts that
size with no set back. However, Thomsen puts out one
that should fit. Then you need a rail adaptor for your
seat. The Thomsen-Elite seatpost is a really great one
and costs about about $75. The rail adaptor costs $69
now that it has the KH label on it. I have this setup on
my Pashley MUni.

I don't know whether 29.2 or 29.4 is the best size to buy
for option 1. I measured the tube at 29.0 but the included
spacer implies 29.4. For option 2, Thomsen only has 29.0 and
29.4, so you will have to make an intelligent guess or do
some more sleuthing.

A soda can would not bridge that gap usefully.

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U-Turn said:

*The KH seat tube ID is about 29.0-29.4 mm which is HUGE
compared to the standard Miyata 22.2mm. You will have a
hard time, I think finding a shim that will do that for
you; I don't see one in the books I have here. You have
two options: *

The Taiwanese KH frames have a 27.2 mm seat post. The
Canadian made KH Pro frames have weird sizes but the
Taiwanese ones are more normal.

Unicycle.com has a seat post shim to fit a 22.2 mm seatpost
(like the Miyata seat post) in a 27.2 mm frame. 'Seat Post
Sizer' (unicycle.comshopexd.aspOpen ↗)
I can't find the shims in the online catalog. I had to
search on "sizer" to find them.

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U-Turn said:

Quoted message said:

And would the GB4 stiffener fit inside it.

Yes.

true but once you do that the stock bolts are no longer long
enough to mount the seat post since the GB plate is so
thick.you will need new hardware

are we haveing fun yet? 😉

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Hey hey thanks John; I've only dealt so far with this one.
Is there any obvious way to tell the different frames apart
besides with a caliper? Also, are there only two versions of
the frame?

Good point, Jag. Basically I always replace all the hardware
with stainless of completely different dimensions, anyway.
The stiffener also makes it harder to put on the adapter
because the plates makes the bolts point out like the
curvature of the seat, but the adapters are made as though
the bolts can be manipulated around at will.

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U-Turn said:

*Hey hey thanks John; I've only dealt so far with this
one. Is there any obvious way to tell the different frames
apart besides with a caliper? Also, are there only two
versions of the frame? *

There are a couple of different versions of the KH Pro
frame. I think the difference is the size of the bearing.
Some frames use a 1-5/8" and some are 40 mm. I don't know
if there are other changes in the different versions of
the frame.

The KH Pro comes with a shim so it fits a 27.2 mm seat
post so the actual ID of the seat tube isn't something to
worry about.

An easy way to tell the difference between the KH Pro and
the KH (Taiwanese) is to look at the bearing holders. The KH
Pro has a much smoother and elegant design. I'll attach a
picture of the KH Pro bearing clamp. There are some
differences in the crown too, but I'm not sure what those
differences are. If you look at a KH Pro and a KH side by
side you'd notice the differences.

KH Pro bearing holder:

+-------------------------------------------------------
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| Attachment filename: khproframe.jpg |
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U-Turn said:

*Good point, Jag. Basically I always replace all the
hardware with stainless of completely different
dimensions, anyway. The stiffener also makes it harder to
put on the adapter because the plates makes the bolts
point out like the curvature of the seat, but the
adapters are made as though the bolts can be manipulated
around at will. *

Installing the GB4 Stiffener plate is tricky. I have it on
my freestyle unicycle with a made in Japan Miyata saddle. I
had to file away part of the Miyata base to get the hardware
to fit through the stiffener. I'm using a mix of 1/4"
carriage bolts and the original Miyata hardware in the seat.

It is not trivial to install the stiffener. It takes some
work and some fiddling.

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