Advertise on Bikeforums.net



User Tag List

Results 1 to 8 of 8
  1. #1
    Member
    Join Date
    Jun 2009
    Posts
    31
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Proper top-tube length

    Just purchased a frame with a 58cm seat tube and a 59cm top tube . I'm 6 ft tall and am comfortable with the seat tube length of 58 . But how do I determine if the top tube length is right for me without building the bike up?

  2. #2
    * adriano's Avatar
    Join Date
    Nov 2008
    Location
    Baltimore
    My Bikes
    http://velospace.org/node/18951
    Posts
    6,883
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    try the competitive cyclist fit calculator.

  3. #3
    Senior Member
    Join Date
    Feb 2007
    Location
    Central CA
    My Bikes
    Fuji SST, Cotic Roadrat Tourer, Bianchi BASS Commuter Frankenbike
    Posts
    1,122
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    Compare the measurement to a current bike?

  4. #4
    Member
    Join Date
    Jun 2009
    Posts
    31
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Wow, that fit calculator is awesome. Ok, so my top tube is about 1.5 to 2cm too long. Now what? Should I ditch the frame and look for a new one?? If I shorten up the stem to compensate for this what will be the result?
    Last edited by malsr; 06-14-09 at 07:26 PM.

  5. #5
    * adriano's Avatar
    Join Date
    Nov 2008
    Location
    Baltimore
    My Bikes
    http://velospace.org/node/18951
    Posts
    6,883
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by malsr View Post
    Wow, that fit calculator is awesome. Ok, so my top tube is about 1.5cm too long. Now what? Should I ditch the frame and look for a new one?? If I shorten up the stem to compensate for this what will be the result?
    use the calculator as a guide. if you like the frame, two centimeters is close enough to build it up and give it a try unless you have reason to believe otherwise.

  6. #6
    Member
    Join Date
    Jun 2009
    Posts
    31
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    So the top tube is about 2cm too long. What are the ramifications of using a stem that is 2 cm shorter to compensate for this? Would this make the handling more twitchy?
    Last edited by malsr; 06-14-09 at 07:20 PM.

  7. #7
    * adriano's Avatar
    Join Date
    Nov 2008
    Location
    Baltimore
    My Bikes
    http://velospace.org/node/18951
    Posts
    6,883
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by malsr View Post
    So the top tube is about 2cm too long. What are the ramifications of using a stem that is 2 cm shorter to compensate for this? Would this make the handling more twitchy?
    depending on your source, its preferable to not go under 70 or even 90mm, but see what works!

  8. #8
    click. click click.
    Join Date
    Feb 2009
    My Bikes
    Leader 725TR http://velospace.org/node/23532
    Posts
    222
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Shorter stem is my vote. If you don't like it, sell and rebuild!

Posting Permissions

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