Advertise on Bikeforums.net



User Tag List

Results 1 to 11 of 11
  1. #1
    Junior Member
    Join Date
    Sep 2011
    Location
    Rhode Island
    Posts
    9
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Requesting advice regarding a 'vintage' bike purchase

    Hello,
    I'm in the market for a road bike. I came across this bike here online, and am asking the bikeforums community if this a good purchase decision for me.

    I have a mountain bike and am looking for more speed. I am 6'1" and here's the information I was given in an e-mail to the seller:

    it is 25 inches from the crank center to seattube top

    I am new to this, so I'm not entirely sure what the lingo means. Any input would be greatly appreciated!

    Thank you

  2. #2
    Galveston County Texas 10 Wheels's Avatar
    Join Date
    Nov 2007
    Location
    In The Wind
    Posts
    25,651
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Nice bike.
    If you have real long legs you might be able to ride it.

    http://veloweb.ca/bike-fit/

    http://www.bgcycles.com/fitting.html
    Last edited by 10 Wheels; 09-22-11 at 11:38 AM.
    [SIZE=1][B]What I like about Texas[/B]
    http://www.youtube.com/watch?v=PGukLuXzH1E

    Set F1re To The Ra1n ( NY Night Rain Ride)
    http://www.youtube.com/watch?v=W7jfcWEkSrI

  3. #3
    Junior Member
    Join Date
    Sep 2011
    Location
    Rhode Island
    Posts
    9
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I've seen some websites talk about in-seam measurements; I don't know too much about that, just that my length for most pants is 32/32" (I don't wear baggy pants)

  4. #4
    No Money and No Sense sillygolem's Avatar
    Join Date
    Sep 2010
    Location
    Anderson, MO
    Posts
    707
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Read this:
    http://www.sheldonbrown.com/frame-sizing.html

    The length of your legs are going to be a lot more important than your total height, especially with a mountain bike. I'm 6'3", but I mostly ride women's frames because I'm all torso.

    The general rule of thumb is to have a "fistful" (4-6 inches) of exposed seat tube when the height is adjusted correctly. Put your heel on a pedal in its lowest position and straighten your leg. Adjust the seat to meet your butt. When you pedal you'll have the ball of your foot on the pedal: This will give you a full range of motion without fully extending your leg. If you're new to cycling, this is going to seem way too high, but you'll find it makes riding a lot more comfortable. You may need to lean the bike over to put your feet on the ground at stops.
    Quote Originally Posted by Scrodzilla View Post
    I ride fixed because I'm mad at my parents. **** you Mom!

  5. #5
    Nigel nfmisso's Avatar
    Join Date
    Mar 2011
    Location
    San Jose, CA
    My Bikes
    1980s and 1990s steel: CyclePro, GT, Nishiki, Schwinn, SR, Trek........
    Posts
    1,066
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    It is on the tall side for you. You will not be able to have both feet flat on the ground straddling the top tube; which typically takes 8 to 9" less between the crank center line to the top of the seat tube than your trouser inseam. For example; my trousers are 31" inseam, and a 22" or 23" works well for me. Anything larger, and it would not be possible to have the bike straight when stopped off the seat with my feet flat on the ground.
    Nigel
    Mechanical Design Engineer

  6. #6
    Senior Member randyjawa's Avatar
    Join Date
    Apr 2007
    Location
    Thunder Bay, Ontario, Canada - burrrrr!
    My Bikes
    1982 Tomassini, 1963 Peugeot PX10, and eight special issue Canadian lightweights...
    Posts
    5,779
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    The bicycle is too big for you. Have a look at this Does It Fit article I published a while ago. It might help you understand a wee bit about how to figure out if a vintage bicycle will fit you properly.

    My youngest grandson took one look at this Cambio Rino and wanted to take it out for a ride. He had no idea that the bicycle was too big for him. Sadly, this situation manifests itself with adults, me being one at the beginning of my interests in old bikes, quite often...


    I should add that the boy did not realize that my slippers did not fit him well, either:-)
    Last edited by randyjawa; 09-22-11 at 12:58 PM. Reason: little joke added
    Learn how to find, restore and maintain vintage road bicycles at... MY "TEN SPEEDS"

  7. #7
    DRF aka Thrifty Bill wrk101's Avatar
    Join Date
    Jan 2008
    Location
    The NC Mountains
    My Bikes
    Too many to list, all vintage
    Posts
    19,529
    Mentioned
    65 Post(s)
    Tagged
    1 Thread(s)
    Pant inseam does not equal bicycle inseam. Do a little google search, I would be surprised if your bicycle inseam isn't quite a bit more than 32 inches, maybe 34 inches. You need to figure out what size you need first, then pounce on a deal in your size. A good deal on a bike the wrong size is a bad deal.

    That bike ad you attached is quite large, I would be surprised if it fit you.

  8. #8
    Decrepit Member Scooper's Avatar
    Join Date
    Aug 2005
    Location
    San Francisco California
    My Bikes
    Waterford 953 RS-22
    Posts
    8,797
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'm 6' tall with nearly half of my height (35.5") in my leg length, and a 25" center-to-top frame would be too big for me. 24" (61cm) frames fit me well.

    Use this table as a rough guide for traditional geometry frame sizing.

    - Stan

  9. #9
    Senior Member
    Join Date
    Jan 2011
    Location
    phoenix
    My Bikes
    Miyata 110, Schwinn super le tour 12.2, Schwinn super sport, Lemond Zurich
    Posts
    513
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I loved my super le tour 12.2, but the ding in the tt bugged me too much. Still regret giving it away.
    Even a turkey can fly in a hurricane

  10. #10
    Junior Member
    Join Date
    Sep 2011
    Location
    Rhode Island
    Posts
    9
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks to everyone that replied.

    Let me recap:
    After measuring, my bike inseam is close to 34".
    For a comfortable fit, there should be 4-6" of seat tube visible when adjusted.
    The top tube should be less than my bike inseam to avoid discomfort (as well as dangerous accidents in areas!).
    I am assuming the crank center is the apparatus containing the pedals and chains.
    Therefore, the bike advertised with a 35" standover height is too big for me to ride.
    I don't entirely understand why I need to know the distance from the crank center to the seat tube top.

    Is this correct? If so, what would be the ideal bike specs for a guy like me?
    Once again, many thanks to all of you.

  11. #11
    Decrepit Member Scooper's Avatar
    Join Date
    Aug 2005
    Location
    San Francisco California
    My Bikes
    Waterford 953 RS-22
    Posts
    8,797
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by pants2422 View Post
    Thanks to everyone that replied.

    Let me recap:
    After measuring, my bike inseam is close to 34".
    For a comfortable fit, there should be 4-6" of seat tube visible when adjusted.
    The top tube should be less than my bike inseam to avoid discomfort (as well as dangerous accidents in areas!).
    I am assuming the crank center is the apparatus containing the pedals and chains.
    Therefore, the bike advertised with a 35" standover height is too big for me to ride.
    I don't entirely understand why I need to know the distance from the crank center to the seat tube top.

    Is this correct? If so, what would be the ideal bike specs for a guy like me?
    Once again, many thanks to all of you.
    The reason you need to know the distance from the crank center to the seat tube top is because that is how frame sizes are specified by manufacturers who use the "center-to-top", or c-t-t (sometimes c-t) method of specifying frame size. There are other manufacturers who use the distance from the crank center to the intersection of the centerlines of the seat tube and the top tube. This is called the "center-to-center", or c-t-c (sometimes c-c) method of frame measurement. To further complicate things, some manufacturers measure the frame size of a frame with a sloping top tube using a "theoretical" horizontal top tube and size the frame by where a horizontal top tube would intersect the seat tube.

    Schwinn uses the center-to-top method, so when a seller says it's a Schwinn 24" or 61cm frame, you know what size he's talking about.

    - Stan

Posting Permissions

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