Advertise on Bikeforums.net



User Tag List

Results 1 to 12 of 12
  1. #1
    Newbie
    Join Date
    Mar 2008
    Posts
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Machine your own rims?

    I'm looking to put a front brake on my fixed gear for safety purposes. However, my front wheel happens to be a non-machined Deep-V. I'm aware that doing this will wear the surface away anyhow, but was wondering if any local bike shops are able to machine sidewalls? Is this something I could do myself with really really fine grit sandpaper? I know that sounds like a bad idea. But all I've been able to find online is this DIY instruction for bicycle brake resurfacing here..

    http://www.instructables.com/id/bike-rim-resurfacing

    ..but am not sure how different RE-surfacing is than the initial surfacing.

    Who knows. Anyway, I'd rather not buy another front wheel, and don't mind looking ghetto, so if no one knows of anything I guess I'll just deal with it.
    Last edited by samke; 03-16-08 at 08:49 PM.

  2. #2
    On-On! Dr.PooLittle's Avatar
    Join Date
    Jan 2008
    Location
    Chicago, IL
    Posts
    181
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Uh-oh, I sense something coming up here. . .

  3. #3
    Senior Member nathbdp's Avatar
    Join Date
    Nov 2006
    Posts
    624
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    i did it like this

    attach some sand paper to your brake pads, and ride that **** down some steep hills with the brakes applied

  4. #4
    Newbie
    Join Date
    Mar 2008
    Posts
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    uh-oh, what did I do?

  5. #5
    NitroPye
    Guest
    Brake + use it = machined rim.

  6. #6
    hello roadfix's Avatar
    Join Date
    May 2003
    Location
    Los Angeles
    My Bikes
    thank you for asking
    Posts
    18,502
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by NitroPye View Post
    Brake + use it = machined rim.
    agree

  7. #7
    ThumperChump. ThunderChunky's Avatar
    Join Date
    Nov 2007
    Posts
    701
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by crushkilldstroy View Post
    While we're on the subject, does anyone have any ideas for a pair of pants that are like JNCO's but a little bit more aero?

  8. #8
    spaghetti a b seize's Avatar
    Join Date
    Jun 2007
    Posts
    339
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    unmachined is fine. though it may squeek sometimes. especially when wet.

  9. #9
    Banned zelah's Avatar
    Join Date
    Mar 2005
    Location
    Portland
    My Bikes
    Mercier Kilo TT
    Posts
    2,536
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    just take the pads off, i hear that's whats up now. look good AND machine your rims!

  10. #10
    raodmaster shaman
    Join Date
    Dec 2004
    Location
    G-ville
    Posts
    1,431
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by NitroPye View Post
    Brake + use it = machined rim.
    yep.

    The sanding/filing method in the link wont do anything more special than regular pad use. It will just do it a little quicker and probably less evenly, so there isn't really anything to gain. However, that is a good trick for cleaning up already machined rims.

    Because of the size of a rim, it would be just about impossible to get an OEM quality finish from a typical mill or lathe, even if you could get access to one.

  11. #11
    . blickblocks's Avatar
    Join Date
    Sep 2006
    Posts
    3,862
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by roadgator View Post
    yep.

    The sanding/filing method in the link wont do anything more special than regular pad use. It will just do it a little quicker and probably less evenly, so there isn't really anything to gain. However, that is a good trick for cleaning up already machined rims.

    Because of the size of a rim, it would be just about impossible to get an OEM quality finish from a typical mill or lathe, even if you could get access to one.
    Rims are also machined prior to lacing. The precision ought to be as good as the extrusion itself.

  12. #12
    "this is not suck" j0e_bik3's Avatar
    Join Date
    Feb 2008
    Posts
    387
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    if you look at a machined rim, it's NOT just "sanded" or "filed" it has many tiny ridges and grooves like a ruffles potato chip.
    once your pads wear in to the shape of those ridges, you effectively increase the braking surface.

    I've looked into setting up a mill, with a small motor and a rubber drive wheel, and then mounting the laced wheel onto a fork, and then running the rotating wheel into a cutter,....but then I just look at how cheap it is just to go buy one machined velo deep V, and I always lose interest in the self CNC machined wheel.

    the sandpaper trick isn't a half bad idea actually, especially if you use several finer grits in succession, and maybe even some felt, and some polishing compound for the final smoothing.

    I think they'd be noisier than a cat with it's tail under a rocking chair tho
    GT road bike conversion: fixed
    Electric beach cruiser grocery bike:
    best burrito vehicle EVAR!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •