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  1. #1
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    aerodynamic bicycle wheel insert

    So, why doesn't anybody make an insert for a bicycle wheel that turns the wheel into an aerodynamic wheelset? I'm not going to pay $1200 for a mavic cosmic carbone SL if for $40-$60 I can turn my $400 ksyriums into lighter wheel that is nearly as aerodynamic. If anybody knows about one let me know, and if anybody has the manufactureing powerto make one please, tell me once I can get one.
    Giant chickens riding recumbents!!!!!!!

  2. #2
    slow as I ever was Ex Pres's Avatar
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    They exist. Don't know how much they cost, or how much weight they add; but I can guess it won't be as light as you think.

  3. #3
    In beaurocratic limbo urbanknight's Avatar
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    Ksyriums are heavy to begin with, especially compared to the $1200+ aero wheels. Adding material won't make them any lighter.

    Anyway, they make disk covers, but they add a lot of weight. I've also seen homemade mylar creations and J-Disc wheels, but they also had limited utility.

    If you're talking about deep rim profiles and not disk wheels, the older Hed Jet wheels and Mavic Cosmic Carbone were basically regular wheels with carbon fiber fairings, but they also weighed a lot.
    "Well, I guess you can cut the arts as much as you want... Sooner or later, these kids aren't going to have anything to read or write about." (Richard Dreyfus as Glenn Holland)

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    Senior Member Georgebowen's Avatar
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    Masking tape?? but seriosly 3" wide or so tape could work be light. if you want to go from rim up, maybe not a solid disc though.

  5. #5
    In beaurocratic limbo urbanknight's Avatar
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    Alright, I suggest the OP put these babies on his wheels.

    "Well, I guess you can cut the arts as much as you want... Sooner or later, these kids aren't going to have anything to read or write about." (Richard Dreyfus as Glenn Holland)

  6. #6
    Senior Member Georgebowen's Avatar
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    yellow cages?

  7. #7
    Sma diziet's Avatar
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    What if you take a roll of duct tape and stretch it over the wheel on each side?
    Watts/kg meter: 3.76

  8. #8
    In beaurocratic limbo urbanknight's Avatar
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    Quote Originally Posted by Georgebowen View Post
    yellow cages?
    Quote Originally Posted by urbanknight View Post
    ...on his wheels...
    "Well, I guess you can cut the arts as much as you want... Sooner or later, these kids aren't going to have anything to read or write about." (Richard Dreyfus as Glenn Holland)

  9. #9
    Quarq shill cslone's Avatar
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    Wheelbuilder.com makes disc covers for $100 that rival true disc wheels in aerodynamics. IIRC, they add about 400g to your existing wheel. But I have not seen anything that will make them a deep dish wheel.

  10. #10
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    It would be nearly impossible to get the tape (or whatever you used) to be round and to meet at a point inside the spokes. Putting tape around the spokes would be a nightmare in itself.

    The same principal plays out with Mavic Cosmic Carbone SLs, which are lovely wheels btw.

    But kids-don't try this at home.
    This board and the world in general would be a much nicer place if everyone could just take themselves a little less seriously.

  11. #11
    Senior Member Tortuga!'s Avatar
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    This thread just begs for some scraper bike action. I STILL have that song stuck in my head.

    http://www.youtube.com/watch?v=hQGLNPJ9VCE




  12. #12
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    I made a "rear disk wheel" out of packing tape (brown even) when I was in high school. It must have been in March '84, right after I learned about Moser's disk wheel thing.

    It actually worked fine but I couldn't use my rear brake (this was on an "aero" rim but back then that meant something like a 14mm rim). I guess it would work on a track bike. It resembled a JDisc.

    JDisc later made a "deep profile" version but they never really resonated with the racers. Coors Light used them in the Tour du Pont as front wheels for the TT bikes.

    I would guess that a taller fairing should be reasonable to make out of CF, but it would be costly. It would have to be designed to fit particular wheels (rim, spoke count) and have some mighty powerful adhesive for liability reasons.

    I toyed around with the idea of making them for my DV46s because I want taller rims (65mm front, 80 rear would be ideal). I think clamshell would work better than a one-piece, at least for retro-fitting. They'd require proper centering on the wheel/rim, cut-outs for spokes (a la Bontrager/Mavic/Jet), and some kind of pin type thing to keep the two halves lined up (like in plastic models, when you glue the two halves of a fuselage together, they have a pin/hole thing all the way around the two halves). The concept is straightforward, execution would require some precision.

    I figure we'll see a few of these at Interbike this fall, either for aftermarket (unlikely) or maybe for shops (kind of likely). They'd be for hidden spoke nipple wheels (Reynolds) which require dismounting the tire to true the wheel anyway.

    If you build a wheel with exposed nipples but use a spoke nipple with a hex/box head on the other side (Reynolds does this, so does some other companies), then you can outfit any such wheel with "covers".

    If I don't see them, I'll start making molds

    cdr

    *edit* I think these would be good for Topolinos. They're light, comfy, stiff, but have those clunky spoke ends. Covered up I think the wheels would be really fast.
    Last edited by carpediemracing; 08-08-09 at 07:24 AM. Reason: Add Topolino comment

  13. #13
    Senior Member Tortuga!'s Avatar
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    What about that white shrink wrap-like plastic that they use to winterize boats in New England?
    I would think there's a way to put it on there, hit it with a hair dryer, and have a smooth/light/tight rig.

  14. #14
    Sma diziet's Avatar
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    Any non solid insert would end up being a throwaway item, so I can't see it being very useful to 'normal' people.
    Watts/kg meter: 3.76

  15. #15
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    Quote Originally Posted by Tortuga! View Post
    This thread just begs for some scraper bike action. I STILL have that song stuck in my head.

    http://www.youtube.com/watch?v=hQGLNPJ9VCE



    "my bike's lookin' hella ********"

    Yes, yes it is.

  16. #16
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    What would be cool is a wheelset that starts out as a very light climbing wheel and then includes various depth aero inserts.

  17. #17
    nom nom nom Frunkin's Avatar
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    Quote Originally Posted by chadteck View Post
    "my bike's lookin' hella ********"

    Yes, yes it is.
    But it's good, I ride on twenty fou's
    On my scraper bike, like I'm in the pro's.

  18. #18
    Fear no hill
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    Quote Originally Posted by urbanknight View Post
    Alright, I suggest the OP put these babies on his wheels.

    Dork disk?

  19. #19
    Senior Member bvfrompc's Avatar
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    Wheelbuilder.com $90
    Attached Images Attached Images

  20. #20
    In beaurocratic limbo urbanknight's Avatar
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    Quote Originally Posted by Fixitman View Post
    Dork disk?
    Apparently, it wasn't funny.
    "Well, I guess you can cut the arts as much as you want... Sooner or later, these kids aren't going to have anything to read or write about." (Richard Dreyfus as Glenn Holland)

  21. #21
    Senior Member rufvelo's Avatar
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    I used a set of nashbar wheel covers 15yrs ago I think - just terrible.

  22. #22
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    Quote Originally Posted by Tortuga! View Post
    This thread just begs for some scraper bike action. I STILL have that song stuck in my head.

    http://www.youtube.com/watch?v=hQGLNPJ9VCE



    3 minutes of my life I'll never get back. I hope they follow thier follow thier dreams, because thier career seems to be working as well as riding a stationary bike trying to get to the supermarket.

  23. #23
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    Just get a set of these. They'll set you back $2300 (built up)
    Attached Images Attached Images

  24. #24
    * adriano's Avatar
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    corrugated plastic is your friend.

  25. #25
    he said member ls01's Avatar
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    I have had this thought for a while also. A couple of problems to overcome would be
    1) the interface between fairing and rim. rims are all different shapes and depth's, it could be done but thats a lot of different configurations.
    2) attachment to the wheel. we are talking about a light, flexable, areodinamic cover for an existing wheel. It would have to be removable for spoke adjustment/replacement.

    It isnt a bad Idea, It just has a lot......A LOT, of challenges to overcome. I see this as a two piece configuration with the user fitting each side to his wheels, cutting slots for the spokes to emerge from, fitting the two halves together, securing them together.
    That all sounds like a lot of work. I think I will go ride my bike and work on my plan to take over the world, seems easyer to me.

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