Advertise on Bikeforums.net



User Tag List

Results 1 to 7 of 7
  1. #1
    Senior Member JosephLMonti's Avatar
    Join Date
    Sep 2006
    Location
    Atlanta, GA
    Posts
    462
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Derailleur with horizontal dropouts

    Question - if you can use both a derailleur and a hub gear system with horizontal dropouts, then what is the point of vertical dropouts (that don't allow the use of a hub gear system)???

  2. #2
    rhm
    rhm is offline
    multimodal commuter rhm's Avatar
    Join Date
    Nov 2006
    Location
    NJ, NYC, LI
    My Bikes
    1940s Fothergill, 1948 Raleigh Record Ace, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1972 Fuji Finest, 1983 Trek 720, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...
    Posts
    12,716
    Mentioned
    62 Post(s)
    Tagged
    1 Thread(s)
    One drawback of horizontal dropouts is that if the QR or axle bolts aren't tight enough, the torque of pedaling can pull the right side of the axle forward, so the tire hits the frame on the left side. It is thus possible to ride a bike with vertical dropouts even if the rear wheel isn't properly installed. By some twisted logic, perhaps, this is intended as a safety feature.

    But I don't know if that's the reason for them.

  3. #3
    Senior Member Loch's Avatar
    Join Date
    Feb 2007
    Location
    MT, USA
    My Bikes
    Dahon Speed Pro
    Posts
    167
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    It's a little easier for me to remove and install the wheel with vertical dropouts, but not by much.

  4. #4
    Senior Member JosephLMonti's Avatar
    Join Date
    Sep 2006
    Location
    Atlanta, GA
    Posts
    462
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Loch View Post
    It's a little easier for me to remove and install the wheel with vertical dropouts, but not by much.
    I assume that you say this b/c we generally use quick releases w/ vertical dropouts but not with horizontal dropouts...probably b/c a quick release is not strong enough to hold the axle in place against the force of pedaling. But what if someone were to put the axle all the way forward in the (horizontal) dropouts like this (post #10):

    Problem with a Xootr Swift

    By doing this, there is no concern about the axle slipping forward b/c it in the most forward position already.

    It just seems to me that vertical dropouts offer "the best of both worlds"...as in, hub gear system and derraileur option, like on the xootr swift.

  5. #5
    jur
    jur is online now
    Senior Member
    Join Date
    May 2005
    Posts
    6,294
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by JosephLMonti View Post
    It just seems to me that vertical dropouts offer "the best of both worlds"...as in, hub gear system and derraileur option, like on the xootr swift.
    I suppose you mean horizontal...?
    My folding bike photo essays www.dekter.net/

  6. #6
    Senior Member JosephLMonti's Avatar
    Join Date
    Sep 2006
    Location
    Atlanta, GA
    Posts
    462
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by jur View Post
    I suppose you mean horizontal...?
    oops, thanks for catching that...I do mean HORIZONTAL.

  7. #7
    Member
    Join Date
    Nov 2006
    Posts
    20
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by rhm View Post
    One drawback of horizontal dropouts is that if the QR or axle bolts aren't tight enough, the torque of pedaling can pull the right side of the axle forward, so the tire hits the frame on the left side..
    Something like a Surly Tugnut should solve that problem. It is also handy for removing the cap from your cold beverage.

    Nick

Posting Permissions

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