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Input for redesigned Coker

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rec.sport.unicycling
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25 January 2006
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31 January 2006
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new_coker
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  1. johnfoss said:

    So the question is whether there's a workable solution that doesn't
    require a vertical post and all that height?

    There is Roger Davies' existing solution:
    http://tinyurl.com/ruzd

    Telescoping forks allows you to have the seat mounted directly to the
    forks yet still have some adjustment.

    I have tried to come up with a bunch of other ideas for adjustment and
    minimal start height above the saddle but so far none of them look like
    they would be structurally strong enough unless they were made from an
    expensive material.

    --
    peter.bier

    -Peter Bier
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  2. when the new products are ready to market. I will suggest some marketing
    effort towards non-unicyclists.
    The Coker fascinates people (when they see one!) and I have heard of 3
    mature cyclists buying a 36" (actually Qu-ax brand) just for the fun of
    doing something to impress (with humour) other cyclists :p

    --
    wobbling bear

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  3. new_coker said:

    what about a all black one?

    Now you're talking.

    Are you talking to 'Dave' (http://www.livewireunicycles.com/)
    'Stockton' (http://tinyurl.com/b98kb)?

    --
    GILD

    'three short gs and a long e-flat™'
    (http://w3.rz-berlin.mpg.de/cmp/beethoven_sym5_1.wav) - 'map'
    (http://www.frappr.com/unicycleworld)
    'if i'm murdered, don't execute my killer.'
    (http://www.inthesetimes.com/site/main/article/1539/)
    'harper' (http://tinyurl.com/c9epx)
    'NAMASTE!' (http://tinyurl.com/4qcxw)
    'Dave' (http://www.lyricsdir.com/d/deep-purple/child-in-time.php)
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  4. johnfoss said:

    Yes but how would you adjust it? The one in your picture appears to use
    a telescoping tube, but of course that tube doesn't point at the tire
    like it would on even a Hunter-style frame.

    Plus I doubt the functionality of that type of seat on a unicycle,
    where the seat needs to be rigid to the wheel. A suspended seat, unless
    redesigned, would twist side to side and make it hard to steer.

    Haven't tried the Pedersen myself but the suspended saddle I believe is
    quite rigid. If you were to suspend it over the narrow distance between
    the tubes of a double unicycle frame it would become even more rigid.
    Height adjustment is of course necessary and could be achieved by
    telescoping tubes. In theory you could lower the saddle so close to the
    tyre that you smell burnt coker rubber ...

    --
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  5. A consolidation of the existsting 36" and some variants. A new Bigger
    One would be great. A new 40 whatever tyre and rim would be great.
    Maybe a 48"

    --
    onebyone

    Bill Blogs is an alien!
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  6. When the unicycle gets bigger it is not only our lust for big wheels
    that decides what we will buy, our legs set the limits. Since there
    seems to be quite a few around here that would like a wheel bigger than
    36" it would be interesting to see if we can come up with a size that
    is big enough to justify a new coker model but not so big that many
    riders can not ride it.

    Personally I could strech my legs to ride a 44" with a regular Coker
    frame.

    --
    goldenchicken
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  7. Ok, here is my plans so far.

    Rim,
    The rim will be changed to alloy. It will be double wall and be
    approximately 35mm wide.

    Spokes,
    I had planned on using 40 14 gauge spokes. Thereason behind it was
    because 40 14g spokes would be stronger and lighter then the 36 13g
    galvanized spokes of the current wheel. I was not concerned about the
    hub being compatible with other rims because you would not need too
    upgrade the rim anymore. I will probably change the spoke count to 48
    because that is more of what is being asked for I just wanted to let
    you guys know where I was coming from.

    Hub,
    The hub flanges are going too be widened to approximately 100mm wide
    and there will be a better quality bearing, mayba even a hybrid ceramic
    bearing.

    Frame,
    I have designed a modular frame that you will be able to upgrade in
    steps. The standard will be like the current frame. There will be bolt
    on reinforcments that will have brake mounts, bottle mounts, etc. The
    segmented, flat top crown was advised against when I met with John at
    UDC. He thinks the smoother current crown is prefered by most riders
    because it hits your legs less and that Coker's for the most part is
    are not used for trick riding.

    There also could be a handle but I have not designed a good way to
    mount it yet.

    Saddle,
    Whatever it gets it will be better. I will be looking into getting a
    real, production air saddle made. It would have a air bladder and not
    the bmx tube used currently.

    Tire,
    John at UDC suggested the rounder tire. If you look at the profile of
    the current tire it is very square. If the tire had a rounder profile
    you could lean the tire over more when turning and not lose any contact
    patch. If the majority does not think that is neccesary that will save
    me time and money on getting a new tire made. We are also looking into
    making a smooth tread pattern tire.

    40-44 inch wheel,
    Corky has expressed a interest in making a larger wheel "The Biggest
    One" unicycle. It is not a definate thing but is being considered very
    seriously.

    Price,
    I know that the standard Big One is on the higher end of the scale for
    unicycles. It will be evry hard to reduce the cost because of the cost
    of getting everything made. As you know there is not many off the shelf
    parts that a Coker uses. Because of that we have to get everything made
    specifcally for us. The only way that I can see to lower prices is to
    start selling dealer direct. The problem with that is it would cut out
    John at UDC and all of the smaller uni dealers and we do not want to do
    that to the guys that have helped build the unicycle business to what
    it is today.

    Let me know what you guys think so far and thanks again for all of the
    input.

    --
    new_coker
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  8. Wow Troy!
    The specs you have so far sounds awesome! 😎
    As a MUni rider, I really like this "bolt on reinforcments" idea for
    brake!
    Please post some photos of the 'improved-prototype' Coker you are
    working on.
    And maybe some sketches of this 40-44inch "Biggest One"
    We would LOVE to be the first to see them! 😄

    --
    leadpan

    "Pain is temporary. Quitting lasts forever" - Lance Armstrong
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  9. The new specs sound great except:

    1. Not everyone likes air saddles, so I'd prefer a lower price without
    an air saddle.

    2. I think brake mounts should be standard. The main reason I'd ride
    such a big wheel is to go fast and far, so why wouldn't I want a brake?

    --
    phlegm
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  10. phlegm said:

    The new specs sound great except:

    1. Not everyone likes air saddles, so I'd prefer a lower price without
    an air saddle.

    2. I think brake mounts should be standard. The main reason I'd ride
    such a big wheel is to go fast and far, so why wouldn't I want a brake?

    Good point about the brake. The air saddle would most likely be a
    option and there would be a standard velo or something similar on the
    base model.

    --
    new_coker
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  11. On the subject of brakes. Do you want brakes to be very strong like a
    v-brake or do you want something that will just reduce speed but not be
    super strong?

    I have a idea for a hub based brake but it would not have the power of
    a v or hydro rim brake. I won't give out to many details yet but I will
    tell you it would be cable operated and very simple.

    --
    new_coker
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  12. i cant wait for a bigger wheel to come out i hope it does

    --
    unicycle dave
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  13. a tire with a rounder profile would probably be ideal for road riding,
    so if you go ahead with that idea it should be a little
    lighter/skinnier and with the smoother tread you mentioned. a 42"
    wheel would be great. distance riders would buy them because they're
    faster and novelty riders would be more inclined to buy them because
    they're even more incredible.

    --
    boo radley

    "plus Maxxis tyres suck... a tyre made of cheese will last longer"

    "no really, are you sure you love me more than your unicycle?" -my gf
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  14. new_coker said:

    The segmented, flat top crown was advised against when I met with John
    at UDC. He thinks the smoother current crown is prefered by most riders
    because it hits your legs less and that Coker's for the most part is
    are not used for trick riding.

    Yes. Though a few people will always want to do such things, it's much
    harder to do them, especially using your foot on the crown, than on a
    smaller-wheeled uni. Plus, I think some of these riders are applying a
    standard comment about frame designs; one that does not apply on such a
    large wheel.

    Quoted message said:

    There also could be a handle but I have not designed a good way to mount
    it yet.

    Please don't give up on the handle. I find it an essential component of
    what makes long Coker rides (like my commute to work) more enjoyable.
    Without a good place to rest your hand(s), all weight remains on your
    crotch. On a bike a big percentage of your weight is on the handlebars
    and we (road/distance/commuters) really need that.

    This picture shows the current setup I have on my Coker Deluxe:
    http://unicycling.smugmug.com/gallery/345524/3/13733089
    This is a makeshift setup, but I find it so useful I've taken it apart
    and brought it to unicycle conventions where I attached it to a
    borrowed Coker to race the 10k (came in 3rd! 🙂).

    A little bit about that handle:
    It was made by Paul Wyganowski for Bronson Silva. Bronson later had a
    spaceage Coker made (perhaps the most advanced one ever), so he sold
    this handle to me. I'm taller than him, so I have it mounted much lower
    than originally intended, and attached a couple of bar-ends to what is
    intended as a front "bumper." This provides me with a slightly aero
    position, relieving a bunch of weight from my crotch. The T-bar in
    front of the seat works for upright riding, and the part on the back,
    also intended as a bumper, could be modified to hold a bike trunk bag
    of some sort. The water bottle is handy for rides like my commute,
    where I'm not going for hours, and don't want to arrive with a sweaty
    back (from my Camelbak).

    Ultimately a handle system would have an adjustment to allow the rider
    to move the handles farther out the front depending on comfort level.

    A key factor in any handle design is what I'll call "runout." You need
    to be able to forward-dismount off the unicycle without getting hung up
    on it. Hence the narrow design with bar-ends.

    Ultimately I'd like to have a Y-shaped, narrow pair of handlebars up
    front, with some kind of skids that go in front of your fingers. These
    would protect the end of the bars from digging into the ground (like
    mine do) in a drop.

    I don't know how much of that can be reasonably incorporated into a
    production add-on, but it would greatly ease access by larger numbers
    of riders into long-distance unicycling. The rest of us will probably
    continue to experiment and refine designs for individual needs.

    Quoted message said:

    I will be looking into getting a real, production air saddle made. It
    would have a air bladder and not the bmx tube used currently.

    Don't let anyone talk you out of that idea! All production-level saddle
    research & development is very welcome! If people don't like it they
    will still be able to use the saddle of their choice. Please stick with
    the standard 4-bolt mount you currently have though, unless you go to
    something more advanced. Your backup choice of a Velo works for me as
    well.

    Quoted message said:

    John at UDC suggested the rounder tire... If the majority does not think
    that is neccesary that will save me time and money on getting a new
    tire made. We are also looking into making a smooth tread pattern tire.

    I wish I knew more about tire qualities to be more helpful here. John
    D. knows the market probably better than any of us, so he probably
    knows what he's talking about. I'm fine with the stability and ride of
    my tire but have nothing to compare it with. Woud a rounder tire, with
    smaller contact patch, wear out faster from normal road-riding use?

    By contrast, the 7/8" hard rubber tire on my 45" handles totally
    differently. That tire makes it much easier to turn, spin, swoop,
    anything. Friction is very low. This is great for fancy riding, like in
    shows, but also promotes more wobble when going straight. Also it makes
    a nice wood floor like riding on black ice.

    I like the way the Coker tracks straight ahead, and tend to think of
    the cycle as something made to do that. But the novelty owners, who I
    estimate are the majority of your customers, may want better turning
    abilities.

    So I guess I'll conclude my ramble by saying I can't disagree with John
    D., but I also haven't noticed anyone here asking for shape changes to
    the tire. The main variant this crowd would like is a lighter one. A
    lighter tire (and tube!) would be big sellers in the enthusiast crowd.
    If lighter weight means a shorter life, you'll just sell more of them.
    The current tire lasts a really long time, so you have room to play
    around there, as long as you keep the original tire or something
    similar.

    Quoted message said:

    Corky has expressed a interest in making a larger wheel "The Biggest
    One" unicycle. It is not a definate thing but is being considered very
    seriously.

    Please consider on! I estimate that eventually, every current Coker
    owner who responded to this thread will buy one. That's not a huge
    number in itself, but the same will apply to many other Coker owners
    and of course first-time buyers. This is a growing market, a market
    that didn't even exist before the first Coker. In the future there will
    be long-distance road races, more uni-tours, and possibly even Coker
    clubs, being made up of only distance riders.

    We should all expect a bigger wheel model to be intended for a smaller
    market, and to cost up to 50% more than the original.

    Use caution calling it "Biggest One." In unicycling, superlatives have
    a tendency to not last long. How about "Really Big One?" 🙂

    Quoted message said:

    I know that the standard Big One is on the higher end of the scale for
    unicycles. It will be evry hard to reduce the cost because of the cost
    of getting everything made.

    Yes, dealer-direct would hurt sales. And though today's Coker is more
    expensive than other entry-level unicycles, it's anything but an
    entry-level piece of hardware. The reason the Coker is a success is
    because it *IS* affordable. Before that, a handmade big wheel was at
    least $600 for something with a rock-hard tire.

    That said, I understand the imperative to keep the price as low as
    possible for the base model.

    --
    johnfoss

    John Foss
    "jfoss" at "unicycling.com" -- www.unicycling.com
    -----------------------------------------------

    "Idiot America—where fact is merely that which enough people believe,
    and truth is measured only by how fervently they believe it." --
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  15. new_coker said:

    On the subject of brakes. Do you want brakes to be very strong like a
    v-brake or do you want something that will just reduce speed but not be
    super strong?

    I have a idea for a hub based brake but it would not have the power of
    a v or hydro rim brake. I won't give out to many details yet but I will
    tell you it would be cable operated and very simple.

    Brakes are there mostly as a drag on long downhills. So having a
    strong brake isn't really a plus. Imagine the outcome of the tire
    screeching to a halt on one wheel. It's not very pleasant. Without
    the brake, when you travel downhill all the resistance for slowing is
    you almost standing on the back pedal as it rises. This requires a lot
    of energy. On a bike downhills are for coasting and resting. Without
    a brake on a Coker, it can be almost harder than uphill.

    Currently I have a magura hydraulic mounted to my Hunter frame. It can
    be set to just drag as I descend a long hill. I have also tried an
    A-Brake, but just as I experienced with a square Frame the A Brake
    caught my leg as I pedaled. The Magura doesn't catch at all on my
    legs.

    'Side by Side Comparison of Frames' (http://tinyurl.com/98s77)

    --
    bugman

    It's tough for an atheist when he feels grateful and has noone to thank.
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  16. Okay, somebody asked for a rounder tire while I was writing the
    above...

    new_coker said:

    Do you want brakes to be very strong like a v-brake or do you want
    something that will just reduce speed but not be super strong?

    Brakes are just used for riding down either steep, or long hills. A
    drag brake system was used by a group of pre-Coker roadies who toured
    the Alps in 1996 or so. They used bike shift levers to adjust brake
    tension for miles of hands-free downhill riding. I don't think anyone
    needs to be able to lock up the wheel, except people who haven't
    learned to freemount yet. They just need to practice a little more
    until they get it.

    The hub brake idea sounds cool. Could it be less expensive than an
    ordinary V-brake or similar? Test it by riding down the steepest hills
    you're not afraid to ride down. I heated mine up real good in San
    Francisco!
    http://unicycling.smugmug.com/gallery/933327/2/42719996

    --
    johnfoss

    John Foss
    "jfoss" at "unicycling.com" -- www.unicycling.com
    -----------------------------------------------

    "Idiot America—where fact is merely that which enough people believe,
    and truth is measured only by how fervently they believe it." --
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  17. new_coker said:

    Hub,
    The hub flanges are going too be widened to approximately 100mm wide
    and there will be a better quality bearing, mayba even a hybrid ceramic
    bearing.

    I'm not sure how this would affect the cost, but I think an isis
    splined hub would be a good improvement. no matter how tightly cranks
    are pressed on one of those hubs, I always seem to find a way to loosen
    one or both of the cranks in the middle of my ride. Also, with the isis
    design the owner has a much wider choice if he/she wants to upgrade, or
    try different size cranks.

    --
    onetrack

    "People over here have a dangerous habit of adding quotes to signature
    lines."
    -Klaas Bil
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  18. johnfoss said:


    I estimate that eventually, every current Coker owner who responded to
    this thread will buy one. That's not a huge number in itself, but the
    same will apply to many other Coker owners and of course first-time
    buyers. This is a growing market, a market that didn't even exist
    before the first Coker.

    I'm a new Coker rider and I definitely agree with John. If a 42 or 44
    inch "Bigger One" came out I would buy one, and I don't think I am
    alone. I notice that a lot of Coker riders are older (40+) and "may"
    have more disposable income to spend on less injury-prone sports such
    as Cokering. Please "Build It, and We Will Come".

    --
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  19. It seems nobody has mentioned transporting a bigger coker wheel? Two
    issues. First is shipping. I'm not sure but a 42" Coker Wheel may be
    to big for UPS. Second will a 42" or 45" fit in a car? My suggestions
    would be to have all the parts available for purchase seperately so you
    could pick an choose. Second if you are going all out why not offer a
    splined hub and cranks with an internally geared hub.

    --
    oxfordrider
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  20. ups would still ship it at a billable weight of 90 lbs, which costs
    around $100. it might not fit in a lot of car trunks, but neither do
    most bicycles.

    --
    boo radley

    "plus Maxxis tyres suck... a tyre made of cheese will last longer"

    "no really, are you sure you love me more than your unicycle?" -my gf
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