cannondale carbon lefty, mated for unicycle use?

Has anyone taken a Cannondale carbon lefty and used it for the purposes of a
unicycle? Are there all off the shelf parts to get it done or would anything
custom be needed?

I think Kris Holm or someone mentioned that they put together a visually
interesting uni, it may not have been single sided but I know it was from a
few years ago and had Carbon spingery wheels and a seat shock. It flexed too
much and overall wasn’t that great.

http://www.cannondale.com/bikes/innovation/carbonlefty.html

The ride mentioned above… at least, I think that’s how I spell what I’m thinking, which is mentioned, or menchoned, or munchies, or muggles… ah, it can all be too much to bair… or is it bear? bare?

Spinergy Uni

Christopher

Ahh, here I can be of some use. Take a gander at this beauty:

I dont know who made it, but i want it. Dont really think its too practical though.
I think that this can also fit in the Planar Unicycle thread. This is about the closest we may ever get to a planar unicycle. It is a half planar uni. on the right side, the pedal is connected directly to the wheel, but the left has a crank.
-David Kaplan

unidak

i think i saw that in that magazine called Mountain Bike Distraction,like 8 yearz ago.if i remember right it waz a Specialized concept?

Re: cannondale carbon lefty, mated for unicycle use?

Hi,
I don’t think the Lefty could hold up to the torque that a
unicyclist would give. In its intended purpose the Lefty doesn’t deal
with much twisting, just up and down (for the most part). Especially when
ascending steep hills, unicycles produce a huge amount of torque, that
would probably make the Lefty “sloppy” if not break it.
There was a unicycle made by Specialized, the bicycle company,
that was called “Unipyscho” or something like that. It was single sided
as you mentioned but I doubt it was made by a true unicyclist because it
had handlebars w/ bar ends and a weird seat.

Just my opinion,
Jeff T.


GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today! For your FREE software, visit:
http://dl.www.juno.com/get/web/.

RE: cannondale carbon lefty, mated for unicycle use?

> Ahh, here I can be of some use. Take a gander at this beauty:
> http://tinyurl.com/39x

A cool “concept” unicycle. I wonder if it has been ridden, and by whom? Or
was the builder worried that riding would break it, and not allowed it to be
ridden?

> I dont know who made it, but i want it. Dont really think its too
> practical though.

Actually, if it doesn’t have structural or twisting problems, it might make
a real nice road unicycle, but only if you cut down that ridiculous crank
length. This means threading another pedal hole in the wheel. I wouldn’t
want those handlebars in my way on a MUni trail. and as a road bike, the
brake would be unnecessary.

> I think that this can also fit in the Planar Unicycle thread. This is
> about the closest we may ever get to a planar unicycle. It is a half
> planar uni. on the right side, the pedal is connected directly to the
> wheel, but the left has a crank.

This means the wheel is off-center beneath the rider. I wonder if this would
cause the uni to pull to the left?

As for using the Cannondale Lefty fork, you would have to figure out how to
mate it to a unicycle crankset and bearing. A bicycle front wheel merely
needs to be bolted to a fork. Obviously it’s a little different with a
fixed-gear unicycle wheel. So the first hurdle would probably be to modify
the fork to accept a one-sided bearing setup. This might require a custom
hub as well. You could use a regular hub, but supporting all the weight on
one side would probably lead to premature breakage.

The second problem, as somebody else mentioned, is that though the Lefty
fork is probably strong enough to take the weight, it was not designed to
resist the twisting forces of unicycling. This is where the wheel and seat
twist in opposite directions as you pedal. However, this kind of twisting on
this kind of fork is probably less likely to lead to tire rub than on a
two-sided fork… :slight_smile:

Somebody (not me) needs to spend the money to find out if this works. If it
does, the theory of the Cannondale Lefty fork unicycle will be proven! Then
it will be time to prove if the unicycle offers any advantages over a two
sided one, other than ease of tire-change…

Stay on top,
John Foss, the Uni-Cyclone
jfoss@unicycling.com

“I am never riding the wrong way on a busy street again, esp. when on the
phone.” - David Stone, on survival

RE: cannondale carbon lefty, mated for unicycle use?

> ‘Spinergy Uni’ (http://tinyurl.com/39w)

This unicycle was a project intended to make use of the cool Cannondale
Headshok, and a cool Spinergy wheel, onto a cool mountain unicycle.

Unfortunately the end result, though very cool to look at, weighed a ton,
defeating the purpose of the lightweight wheel. With all the attention paid
to the cool and expensive components, not enough was paid to the handmade
parts on the rest of the cycle, namely the seat post, which was a huge chunk
of aluminum.

The cycle was actually fine, and lighter than what Kris Holm used to use,
but did not achieve the light weight and style originally intended.

I wonder what Daniel Hopkins has been up to lately? Haven’t heard from him
in a long while…

Stay on top,
John Foss, the Uni-Cyclone
jfoss@unicycling.com

“I am never riding the wrong way on a busy street again, esp. when on the
phone.” - David Stone, on survival