Advertise on Bikeforums.net



User Tag List

Results 1 to 10 of 10
  1. #1
    Senior Member
    Join Date
    Sep 2003
    Location
    Willimantic, Connecticut
    My Bikes
    '70s Puch sport tourer, '90 Peugeot Success.
    Posts
    499
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Drilling Out an EBike Frame?

    The frames on these look way overbuilt. I'm wondering to what extent they could be drilled out & still retain structural integrity (i weigh 175). How would you determine size of holes & spacing?
    Where have you been all your life?

  2. #2
    sch
    sch is offline
    Senior Member
    Join Date
    May 2003
    Location
    Birmingham. AL
    Posts
    2,614
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Are you referring to the bike that looks like a moped with an electric motor?
    I doubt that a significant change in weight would come from drilling out the frame. Why not switch to lithium cells to save weight? Steve

  3. #3
    Senior Member
    Join Date
    Sep 2003
    Location
    Willimantic, Connecticut
    My Bikes
    '70s Puch sport tourer, '90 Peugeot Success.
    Posts
    499
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Hi Steve. This is the recumbent (human-powered) with the simple box beam frame. It's fairly massive. Of course this may be a crazy or silly idea - i certainly wouldn't consider it with a conventional bike frame, but i'm a tinkerer by nature.:->
    Where have you been all your life?

  4. #4
    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)
    I think he has misplaced his E.
    BikeE (bankrupt recumbent) vs. ebike (Lee Iacocca's 24V & 36V electrics-uprights and folders).

  5. #5
    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)
    ebike already went to Lithium ion batteries on their folder, but they still use lead acid on their other models. NiMH is lighter.
    I believe Ford's Th!nk Bike had lithium batteries as well before they pulled the plug on that program.

  6. #6
    Newbie
    Join Date
    Oct 2003
    Posts
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You might not save as much weight as you think. Aluminum weighs .11 lbs per cubic inch. Lets say you cut 20 holes, 1.5" dia. in a 1/8" wall square tube. All that work and you only save .48 lbs.

  7. #7
    Junior Member
    Join Date
    Nov 2003
    Location
    Post Falls, Idaho
    My Bikes
    Cycle Genius, Sidewinder, Quetzal
    Posts
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You won't save enough weight to notice it. A better option is to not supersize those fries. ;^)

  8. #8
    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)
    I think these hilarious pics should remove that notion that the BikeE frame is overbuilt.
    Note the frame bent rather than the chain snapping.

    http://joesacher.com/cycling/motorbikee.php

  9. #9
    Fool O' crap sscyco's Avatar
    Join Date
    Jul 2002
    Location
    spokane
    My Bikes
    Specialized Tricross, Allez steel, Transition, 2009 Bighit 3, Lightspeed Owl Hollow and Kitsuma - and a couple others
    Posts
    1,217
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    However, if you do put the holes in your frame you can brag about how you transformed the bike frame material from aluminium to Drilleium .

  10. #10
    My own worst nightmare
    Join Date
    Jan 2004
    Location
    Madison, WI USA
    Posts
    1,237
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Now that's getting sillium!

Posting Permissions

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