Advertise on Bikeforums.net



User Tag List

Results 1 to 17 of 17
  1. #1
    Senior Member
    Join Date
    Jul 2011
    Location
    Grapevine, Texas
    Posts
    68
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Question about my downtube shifters

    Just purely out of curiousity and nothing else. With my downtube shifters, if I were to ever decide to bump up my speeds from 6 to something higher...can those same downtube shifters be used to be recalibrated for the increase in shifting? Or do they make downtube shifters specifically for different speeds? IE 7, 8, 9 , 10 ETC?

  2. #2
    Noob mikezs's Avatar
    Join Date
    Sep 2011
    Location
    Essex, UK
    My Bikes
    Specialized Rockhopper Expert Disc 2009, Giant Boulder 510 Sports 1999, Olympic Competitor 1978
    Posts
    71
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    IIRC, the whole "number of gears" thing is just how much cable pull your shifter can create compared to the size of the cassette. If you get a cassette that’s the same width as your current one (i think 5,6,7 are the same size, and 8,9,10 are a different, but don't quote me) then your RD and shifters won't mind.

    Edit: Just to note that this all is assuming you haven't got indexed shifters, or they can be used in friction mode.
    Last edited by mikezs; 09-08-11 at 07:55 AM.

  3. #3
    just pokin' along desertdork's Avatar
    Join Date
    Aug 2008
    Location
    the desert
    Posts
    1,015
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If you want indexed shifting, you'll need shifters that match the # of cogs in back. If you don't mind friction shifting, and your current shifters offer a friction setting, then you're probably fine. FWIW, replacing your current shifters is a modest expense when you consider that your current rear wheel won't be compatible, and you might pay to have the rear triangle spread for the wider hub if you go with 8-sp & up.

  4. #4
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    24,852
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Good quality downtube shifters indexed for 7 and 8-speeds are out of production and getting a bit hard to find. Downtube shifters for 9 and 10-speeds are relatively plentiful.

  5. #5
    bike whisperer Kimmo's Avatar
    Join Date
    Dec 2009
    Location
    Melbourne, Oz
    My Bikes
    - - - - - - - - - - - - - - http://velospace.org/node/36949 http://velospace.org/node/47746 http://velospace.org/node/47747
    Posts
    6,555
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    Old hat anyway.

  6. #6
    Senior Member
    Join Date
    Sep 2007
    Location
    Gaseous Cloud around Uranus
    Posts
    3,191
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I run old 105 DT shifters.Came with 6 speeds now has 8,could handle 9 for sure,maybe 10.
    Everything should be as simple as possible...But not more so.---Albert Einstein

  7. #7
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    24,852
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Booger1 View Post
    I run old 105 DT shifters.Came with 6 speeds now has 8,could handle 9 for sure,maybe 10.
    I assume these are friction. Since 8,9 and 10-speed cassettes are all very close in overall width, if they will do 8, they will do 10.

  8. #8
    bike whisperer Kimmo's Avatar
    Join Date
    Dec 2009
    Location
    Melbourne, Oz
    My Bikes
    - - - - - - - - - - - - - - http://velospace.org/node/36949 http://velospace.org/node/47746 http://velospace.org/node/47747
    Posts
    6,555
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    All Shimano DT levers have a friction setting, AFAIK.

    I'm not sure I've even seen friction-only Shimano DTs aside from an old 5spd Dura Ace bike I used to have... other brands were a lot more popular before indexing.

  9. #9
    In the right lane gerv's Avatar
    Join Date
    Dec 2005
    Location
    Des Moines
    My Bikes
    1974 Huffy 3 speed
    Posts
    8,917
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Last year I upgraded my 6 speed cog to an 8 speed. My Shimano 600 DT shifters (friction only) had absolutely no issue with the upgrade. I actually like friction shifters.

  10. #10
    Broom Wagon Fodder reverborama's Avatar
    Join Date
    Jul 2006
    Location
    Minnesota
    My Bikes
    Fuji Supreme; Fuji Royale; Schwinn Varsity; Nishiki International; Schwinn Premis, Falcon Merckx
    Posts
    1,145
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I run Shimano 7-speed shifters in friction mode on a bike with a 9-speed cassette and it works great. I found a set of SunRace indexed 9-speed shifters did not work as well!

  11. #11
    Insane Bicycle Mechanic Jeff Wills's Avatar
    Join Date
    Mar 2008
    Location
    other Vancouver
    Posts
    6,428
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Kimmo View Post
    All Shimano DT levers have a friction setting, AFAIK.

    I'm not sure I've even seen friction-only Shimano DTs aside from an old 5spd Dura Ace bike I used to have... other brands were a lot more popular before indexing.
    True. Shimano's product range was somewhat narrower when they were the #3 producer of bike parts:
    http://www.sheldonbrown.com/shimano1982/pages/14.html
    http://www.sheldonbrown.com/shimano1982/pages/17.html
    http://www.sheldonbrown.com/shimano1982/pages/20.html
    http://www.sheldonbrown.com/shimano1982/pages/23.html
    http://www.sheldonbrown.com/shimano1982/pages/26.html
    http://www.sheldonbrown.com/shimano1982/pages/34.html
    Jeff Wills

    All my bikes.

  12. #12
    Senior Member
    Join Date
    Feb 2001
    Location
    England
    Posts
    12,080
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Rivendell sell a Silver DT shifter which is a copy of the old Suntour microshifting lever. I picked up an old Suntour one and they are really good. They sort of index with everything. I mainly use it as a spare when touring with my STI integrated levers.
    I changed my old DT friction bike from 5 to 6 to7 and its all works well.

  13. #13
    In the right lane gerv's Avatar
    Join Date
    Dec 2005
    Location
    Des Moines
    My Bikes
    1974 Huffy 3 speed
    Posts
    8,917
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by MichaelW View Post
    Rivendell sell a Silver DT shifter which is a copy of the old Suntour microshifting lever. I picked up an old Suntour one and they are really good. They sort of index with everything. I mainly use it as a spare when touring with my STI integrated levers.
    I changed my old DT friction bike from 5 to 6 to7 and its all works well.
    I picked up a pair of these recently. They are also marketed under the Dia Compe label. But they are friction only.

    However, you can also purchase a $30 plug-in for them and use them as bar end shifters.

  14. #14
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    24,852
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by MichaelW View Post
    I picked up an old Suntour one and they are really good. They sort of index with everything.
    Actually they "index" with nothing but as friction shifters they work with nearly everything. The ratchets in the Sun Tour "Power Ratchet" shifters were very fine tooth and worked only in one direction. They ratched as you pulled in cable against the derailleur's springs and used friction to hold them in place and to let out cable. That balanced the force needed to move the levers both ways. Strictly friction levers are noticably harder to move against the spring tension than while releasing it.

  15. #15
    Senior Member
    Join Date
    Jun 2010
    Location
    Pearland, Texas
    My Bikes
    Cannondale, Trek, Raleigh, Santana
    Posts
    5,137
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Kimmo View Post
    All Shimano DT levers have a friction setting, AFAIK.

    I'm not sure I've even seen friction-only Shimano DTs aside from an old 5spd Dura Ace bike I used to have... other brands were a lot more popular before indexing.
    I had a set of SL-R400 levers (?) that were 8S index only for the rear, friction for the front.

    Brad

  16. #16
    Senior Member JTGraphics's Avatar
    Join Date
    Dec 2006
    Location
    So Cal
    Posts
    2,415
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by dinkjs View Post
    Just purely out of curiousity and nothing else. With my downtube shifters, if I were to ever decide to bump up my speeds from 6 to something higher...can those same downtube shifters be used to be recalibrated for the increase in shifting? Or do they make downtube shifters specifically for different speeds? IE 7, 8, 9 , 10 ETC?
    If you are going to upgrade I'd also consider replacing the down tube levers with some updated STI's and it will also make it so much nicer shifting.
    I did this to my old Cannondale SR500 you can see photos here http://www.jtgraphics.net/cannondale_sr500.htm
    It may not be fancy but it gets me were I need to go.
    http://www.jtgraphics.net/cyclist_bicycles.htm

  17. #17
    DRF aka Thrifty Bill wrk101's Avatar
    Join Date
    Jan 2008
    Location
    The NC Mountains
    My Bikes
    Too many to list, all vintage
    Posts
    18,852
    Mentioned
    25 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by Kimmo View Post
    All Shimano DT levers have a friction setting, AFAIK.

    I'm not sure I've even seen friction-only Shimano DTs aside from an old 5spd Dura Ace bike I used to have... other brands were a lot more popular before indexing.
    I've got a drawer full of them.

Posting Permissions

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