Advertise on Bikeforums.net



User Tag List

Results 1 to 22 of 22
  1. #1
    Senior Member DVC45's Avatar
    Join Date
    Dec 2006
    My Bikes
    Schwinn Paramount '91, Downtube Nova and I want more! :)
    Posts
    3,711
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    What size drill bit to change Presta to Schraeder valve?

    I want to standardize on inner tube type. What size drill bit do I use on my rim?
    Thanks in advance!

  2. #2
    Senior Member marcusbandito's Avatar
    Join Date
    Mar 2005
    Location
    Ann Arbor
    My Bikes
    Voodoo Wanga, Waterford RS, Gitane SS
    Posts
    275
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    11/16 drill bit. But I would go in stages and drill progressively bigger holes

  3. #3
    Senior Member
    Join Date
    Jul 2005
    Posts
    3,193
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    11/32 is the one you want. Be sure to get all of the drilling chips and grit out of the inner chamber in the rim and remove any burrs from the edge of the hole. bk

  4. #4
    rebmeM roineS JanMM's Avatar
    Join Date
    Jan 2006
    Location
    Indiana
    My Bikes
    RANS V3, RANS V-Rex, RANS Screamer
    Posts
    11,844
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    A hand reamer works, too.

  5. #5
    Sir Fallalot wroomwroomoops's Avatar
    Join Date
    Jul 2006
    Location
    Helsinki, Finland
    Posts
    5,179
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yeah, chamfer that hole. I actually chamfer ALL the holes in the rim carefully, so I could get away without using rim tape. For low pressure tyres, it works very well.

  6. #6
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    26,153
    Mentioned
    13 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by marcusbandito View Post
    11/16 drill bit. But I would go in stages and drill progressively bigger holes
    11/16"?? I assume either that's a typo or an intentional joke. Thats almost 3/4" diameter and nearly as wide as most rims.

  7. #7
    Senior Member
    Join Date
    Jul 2005
    Location
    Mid-Atlantic
    My Bikes
    A bunch
    Posts
    892
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Round file by hand. A drill bit will bind and tear on relatively soft aluminum alloy rim metal.

  8. #8
    Senior Member hodadmike's Avatar
    Join Date
    Oct 2005
    Location
    Wenatchee, WA
    Posts
    170
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

  9. #9
    Senior Member
    Join Date
    Oct 2005
    Location
    Renton, Washington
    My Bikes
    Cannondale t2000, Schwinn Moab mountain bike, Specialized allez cro-mo
    Posts
    102
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If memory serves it's a 21/64th.

  10. #10
    Senior Member
    Join Date
    Mar 2007
    Location
    Louisville, KY
    My Bikes
    Trek Madone 5.5, Klein Q Pro Elite, Surley LHT
    Posts
    469
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    have done this a few times. I have found that a tapered hand reamer works best. You will also need to debur the hole afte to remove sharp edges. A drill bit larger that the hole works well.

  11. #11
    Dog is my co-pilot 2manybikes's Avatar
    Join Date
    Jun 2003
    My Bikes
    2 many
    Posts
    13,936
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by DVC45 View Post
    I want to standardize on inner tube type. What size drill bit do I use on my rim?
    Thanks in advance!
    Some narrow or thin material wheels may be unsafe if you make the hole bigger. Presta tubes are everywhere. If the other wheel is drilled for Schrader you can just put a presta tube in it.
    [SIGPIC][/SIGPIC]

  12. #12
    Senior Member marcusbandito's Avatar
    Join Date
    Mar 2005
    Location
    Ann Arbor
    My Bikes
    Voodoo Wanga, Waterford RS, Gitane SS
    Posts
    275
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by marcusbandito View Post
    11/16 drill bit. But I would go in stages and drill progressively bigger holes
    OH #@$%&!
    Sorry about that. I meant 11/32. Do me a favor and never trust anything I say before noon.

  13. #13
    Perineal Pressurized dobber's Avatar
    Join Date
    Oct 2003
    Location
    In Ebritated
    Posts
    6,557
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Having done this several times, the advice of starting with the smallest bit possible and gradually working your way up is good.
    This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.

  14. #14
    Senior Member DVC45's Avatar
    Join Date
    Dec 2006
    My Bikes
    Schwinn Paramount '91, Downtube Nova and I want more! :)
    Posts
    3,711
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks to all!

  15. #15
    A little North of Hell
    Join Date
    Mar 2006
    Posts
    4,410
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by JanMM View Post
    A hand reamer works, too.
    +1

    http://www.biketoolsetc.com/index.cg...item_id=HZ-K4B
    [SIGPIC][/SIGPIC]
    XXXI

  16. #16
    Senior Member
    Join Date
    May 2005
    Posts
    6,900
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Why is a better question.

  17. #17
    Sir Fallalot wroomwroomoops's Avatar
    Join Date
    Jul 2006
    Location
    Helsinki, Finland
    Posts
    5,179
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by oilman_15106 View Post
    Why is a better question.
    Can't you read? The OP clearly stated he/she wants to standardize on Schrader. Don't make me go dutret on you.

  18. #18
    meb
    meb is offline
    Senior Member meb's Avatar
    Join Date
    Aug 2003
    Location
    arlington, VA
    Posts
    1,745
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by wroomwroomoops View Post
    Can't you read? The OP clearly stated he/she wants to standardize on Schrader. Don't make me go dutret on you.
    I was pondering whether to drill out a seperate Shraeder hole in order to have the option of either valve type.

    Are there covers out there for the non-used hole or might taping over work?

  19. #19
    Sir Fallalot wroomwroomoops's Avatar
    Join Date
    Jul 2006
    Location
    Helsinki, Finland
    Posts
    5,179
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by meb View Post
    I was pondering whether to drill out a seperate Shraeder hole in order to have the option of either valve type.

    Are there covers out there for the non-used hole or might taping over work?
    You probably are aware of the fact that drilling two valveholes in the rim is not the best thing in terms of rim strength. That little warning out of the way; yes, there are such covers. They are called duct tape.

  20. #20
    Senior Member DVC45's Avatar
    Join Date
    Dec 2006
    My Bikes
    Schwinn Paramount '91, Downtube Nova and I want more! :)
    Posts
    3,711
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by oilman_15106 View Post
    Why is a better question.
    Most of my bikes uses 700c Schraeder tubes and gas stations uses Schraeder valve for their pumps too ( I use my bikes mainly for commuting to work). I know about the adapters, but its another thing to carry around.
    I plan on opening up the existing valve hole, not drilling out another one on the rims.
    Anyway, I hope that clears things up.

    Thanks again!

  21. #21
    Two wheels > four. parabellum's Avatar
    Join Date
    Jan 2008
    Location
    Central Illinois
    My Bikes
    Cannondale R1000
    Posts
    38
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    EDIT: I just saw your most recent post about the adaptors....I just leave mine on.

    My LBS installed Schrader adaptors onto my Presta valves for like $2.....I didn't have to drill any holes and it allows me to use my compressed air tank (which has no presta adaptor on it).

    YMMV, but the adaptors seem like a MUCH better alternative to drilling your wheels...?
    Bike: Cannondale R1000.

    My other rides: 2007 Yamaha FZ6, 2003 BMW 325i.

  22. #22
    Sir Fallalot wroomwroomoops's Avatar
    Join Date
    Jul 2006
    Location
    Helsinki, Finland
    Posts
    5,179
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have a couple of those adapters. Never liked to use them very much. Not a big problem, but a nuisance.

Posting Permissions

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