Advertise on Bikeforums.net



User Tag List

Results 1 to 8 of 8
  1. #1
    Senior Member
    Join Date
    Nov 2007
    Posts
    121
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Translating rider measurements into a frame design

    I'm not a frame builder but have had several custom bikes made. Loosely speaking, the process has been the same each time: to take a whole lot of body measurements, ask a lot of questions about what I'm looking for and what kind of riding I plan to do on the bike (racing, touring, ...). The frame builder then takes all of this and the output is a frame design (tube types, tube lengths, angles, bb height, etc) that hopefully both fits and does what I want it to do.

    I'm curious how frame builders do this. Do you all use a software tool, "rule of thumb" or some other mechanism to come up with a frame design?

  2. #2
    Senior Member
    Join Date
    Dec 2010
    Location
    B.C.
    My Bikes
    ritcheys{2** rm blizzard Geo elrick drop frame and acollection of parts bikes in waiting
    Posts
    182
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    " Designing and Building your own Frameset' by Richard E. Talbot,"The Custom Bicycle"By Kolin and de la Rosa. Suzys blog .Have fun

  3. #3
    Senior Member
    Join Date
    Nov 2007
    Posts
    121
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by lee kenney View Post
    " Designing and Building your own Frameset' by Richard E. Talbot,"The Custom Bicycle"By Kolin and de la Rosa. Suzys blog .Have fun
    Thanks for the references, I'll look them up.

  4. #4
    Member
    Join Date
    Aug 2009
    My Bikes
    Giant iguana
    Posts
    28
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    There might be some software out there but all the framebuilders i kno including myself just use our own calculations written down in spreadsheets, the measurements are usually for how big the top tube and seat tube are or just the bike in general and the rest of it is basically just a lot of trig and calculations to get the right head and seat angle for you. Those angles, although other things like bb drop and wheelbase also affect it, are the main factors that determine how twitchy your handlebars are and how far your weight is put forward, which obviously depends on what you want in your bike.

  5. #5
    Advisor
    Join Date
    Mar 2008
    Location
    Central New Jersey
    Posts
    544
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Serotta software

    There is software out there. Plus Serotta certified fitters have software. They also have a special bike that is fully adjustable, head tube, seat tubes, top tube, and they change the sizing on it until you feel the most comfortable. They then put these dimensions into their software and it determines the angles, for rake or that can be determined by the fitter.

  6. #6
    I love custom cruisers whitefiretiger's Avatar
    Join Date
    Dec 2011
    Location
    Lincoln, NE
    My Bikes
    Versato Riviera 21spd cruiser, 2005 Schwinn Typhoon cruiser 700c wheels, Ocean Pacific cruiser 6spd suicide front brake, 1993 Giant Acapulco SS conversion project
    Posts
    311
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    this is interesting. ive often wondered how this was all done. i'd like to have a cruiser frame built for me but im not aware of any builders around me and if i do find one im sure ill die when i here a price.
    There's just something to be said for a cruiser that can play like a mountain bike or run with the pack of ss/fg road bikes or be a good commuter or be a utility bike and pull a trailer or just cruise around like theres no care but the joy of a leisure ride.

  7. #7
    Old fart JohnDThompson's Avatar
    Join Date
    Nov 2004
    Location
    Appleton WI
    My Bikes
    Several, mostly not name brands.
    Posts
    13,149
    Mentioned
    14 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by ghsmith54 View Post
    I'm curious how frame builders do this. Do you all use a software tool, "rule of thumb" or some other mechanism to come up with a frame design?
    I use software to provide a general idea of frame dimensions, then tweak it for the rider's individual needs and preferences.

  8. #8
    I love custom cruisers whitefiretiger's Avatar
    Join Date
    Dec 2011
    Location
    Lincoln, NE
    My Bikes
    Versato Riviera 21spd cruiser, 2005 Schwinn Typhoon cruiser 700c wheels, Ocean Pacific cruiser 6spd suicide front brake, 1993 Giant Acapulco SS conversion project
    Posts
    311
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    ive been looking at bikecad.ca and playing with the free version. its interesting
    There's just something to be said for a cruiser that can play like a mountain bike or run with the pack of ss/fg road bikes or be a good commuter or be a utility bike and pull a trailer or just cruise around like theres no care but the joy of a leisure ride.

Posting Permissions

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