Advertise on Bikeforums.net



User Tag List

Results 1 to 6 of 6
  1. #1
    Banned.
    Join Date
    Sep 2007
    Posts
    1,548
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Touring Bike Fit Question (top tube measurement)

    Alright...so my road bike has a horizontal top tube measurement of 518mm. I'm trying to get myself a Surly Long Haul Trucker. The 46cm frame has a TT of 508.3mm and the 50cm frame has a TT of 525.1mm. Which would be a better fit?

    Thanks!

  2. #2
    Senior Member
    Join Date
    May 2007
    Location
    Syracuse, NY
    Posts
    585
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    A shorter or longer stem could be used to help with either. What is your seat tube measurement on your road bike?

  3. #3
    Banned.
    Join Date
    Sep 2007
    Posts
    1,548
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Podolak View Post
    A shorter or longer stem could be used to help with either. What is your seat tube measurement on your road bike?
    450mm (C-T), 410mm (C-C)

  4. #4
    Senior Member
    Join Date
    Aug 2005
    Posts
    1,936
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Either one as long as you can get the reach the same with the right stem (without using one that is too long or too short), and get the seat in the right place. Keep in mind that a smaller frame may or may not allow you enough adjustment room to get your saddle as far back as you want it (because they tend to have steeper seat tubes), so check that. The other thing is that it can depend on how high you want your handlebars. The smaller the frame, the less chance you can raise those bars high enough if you like them higher. You might not even be able to get them as high as the saddle if you want that. Personally, I would say the largest frame that fits you for a touring bike rather than the smallest one.

  5. #5
    Violin guitar mandolin
    Join Date
    Sep 2005
    Location
    Friendsville, TN, USA
    My Bikes
    Wilier Thor, Fuji Professional, LeMond Wayzata
    Posts
    1,171
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Consider steering geometry as well. Bars forward tend to be quite different to drive than bars back.

  6. #6
    Seņor Wences jwbnyc's Avatar
    Join Date
    Jul 2005
    Posts
    1,041
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You want to be considering effective TT not actual TT.

    The 46 has an effective TT of 51.5cm.

    The 50 has an effective TT of 53cm.

    These measurements correspond to a horizontal TT measurement.

Posting Permissions

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