Advertise on Bikeforums.net



User Tag List

Results 1 to 9 of 9
  1. #1
    Weekend Warrior
    Join Date
    Mar 2008
    Location
    Vancouver, WA
    My Bikes
    Giant OCR and a couple Bridgestone road bikes + mnt bike
    Posts
    24
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Suntour Command Shifter Question

    Hi- In the next week I should receive a pair of Suntour Command shift levers (7 speed friction or index). My goal is to mount these on my Bridgestone 450 12 speed bike. Obviously with this setup I'm probably going to have to use friction mode as I'm short one cog in the rear. I'm not even sure how this will workout. I am considering getting another freewheel with 7 cogs but I'm wondering do I need to get a rear derailleur to match or can I get away with what I have by re-adjusting the H/L limit screws? (RD=Suntour alpha 5000).

    Anyone have suggestions or advice to share?

    BL

  2. #2
    Senior Member Mhendricks's Avatar
    Join Date
    Nov 2004
    Location
    San Jose, ca.
    My Bikes
    2006 Orbea Volata, 84 Trek 760, 83 Trek 720,
    Posts
    1,326
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    6 and 7 use 126mm hubs so I see no problems and you shouldn't have to adjust the limit screws. The spacing of the freewheels shouldn't cause any problems but you'll see that the minute you put the wheel back in. I've put on 7 speed freewheels to take the place of six. If the Alpha 5000 RD accushift then you can use in index mode.
    They call me "Mr. Mixte"

  3. #3
    Weekend Warrior
    Join Date
    Mar 2008
    Location
    Vancouver, WA
    My Bikes
    Giant OCR and a couple Bridgestone road bikes + mnt bike
    Posts
    24
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    But do you think I can use the Suntour RD Alpha 5000 with a 7 speed freewheel? I think it was originally designed for a 6 but I cannot find any details about this RD.
    bl

  4. #4
    Senior Member
    Join Date
    Dec 2005
    Location
    Atlanta
    My Bikes
    1982 Schwinn Super Sport S/P, 1984 Miyata 610, 1985 Panasonic LX 1000
    Posts
    579
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Frickencrazy View Post
    But do you think I can use the Suntour RD Alpha 5000 with a 7 speed freewheel? I think it was originally designed for a 6 but I cannot find any details about this RD.
    bl
    the 1987 suntour dealer catalog, will answer your questions... http://www.wooljersey.com/gallery/v/.../SunTour/1987/

    ...in combination with the Suntour Accushift Tech manual
    http://www.yellowjersey.org/sturtech.html

    ...taken together they are the Accushift rosetta stone and will answer your questions about what models work with what, and how to make it all work. Happy Hunting!

  5. #5
    Weekend Warrior
    Join Date
    Mar 2008
    Location
    Vancouver, WA
    My Bikes
    Giant OCR and a couple Bridgestone road bikes + mnt bike
    Posts
    24
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    All I can say is "Wow"

    This is great information.
    Thank you.
    b

  6. #6
    Weekend Warrior
    Join Date
    Mar 2008
    Location
    Vancouver, WA
    My Bikes
    Giant OCR and a couple Bridgestone road bikes + mnt bike
    Posts
    24
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    To go along with the shift commands (7 speed) I went and found a Suntour XC Sport 7000 rear derailleur. Apparently this combo should work. My problem is I cannot find an Suntour 7 Ultra freewheel. I tried ebay but lost the auction by $1 and the next available one is like $69. So I'm debating using a Shimano HG 7 Speed 14-28T or a Nashbar 7 Speed Freewheel 13-32. Thoughts? Could the cog spacing of the Shimano or Nashbar effect the Accushift indexed shifting feature by much?

    thanks
    b

  7. #7
    Senior Member
    Join Date
    Dec 2005
    Location
    Atlanta
    My Bikes
    1982 Schwinn Super Sport S/P, 1984 Miyata 610, 1985 Panasonic LX 1000
    Posts
    579
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Frickencrazy View Post
    To go along with the shift commands (7 speed) I went and found a Suntour XC Sport 7000 rear derailleur. Apparently this combo should work. My problem is I cannot find an Suntour 7 Ultra freewheel. I tried ebay but lost the auction by $1 and the next available one is like $69. So I'm debating using a Shimano HG 7 Speed 14-28T or a Nashbar 7 Speed Freewheel 13-32. Thoughts? Could the cog spacing of the Shimano or Nashbar effect the Accushift indexed shifting feature by much?

    thanks
    b
    1. For best Accushift results, use an Accushift Plus derailer manufactured in 1989 to 1992. Earlier ones work, but they don't have the double pivot design that Shimano sued Suntour over.

    2. Freewheel. You MUST pay attention to spacing. With an Accushift 7 speed shifter mated to an Accushift derailer, either
    (a) use any Suntour 7 cog freewheel requiring a 4 notch removal tool, OR
    (b) custom space your Shimano freewheel or modern Shimano Hyperglide cassette.

    The Accushift spacing center to center starting from the smallest cog is 5.3, 5.3, 4.8, 4.8, 4.8 and 4.8mm

    Here is a link explaining how to construct an Accushift compatible custom spaced Shimano Hyperglide cassette Help with late Suntour Compatibility

    As to custom spacing a freewheel--it's theoretically possible but outside my experience.

  8. #8
    Weekend Warrior
    Join Date
    Mar 2008
    Location
    Vancouver, WA
    My Bikes
    Giant OCR and a couple Bridgestone road bikes + mnt bike
    Posts
    24
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Update- I installed the new Command Shifter for the RD with the 5000 and man it works like a charm! First Accushift setup that actually works. I'll probably play around with this for while and then swap over to a different RD with a 7 cog freewheel. Last weekend I purchased a Suntour XC Pro for $12 and also a Suntour AP 7 cog w/4 notch @ the local bike co-op for $8 in practically new shape. You can still see the stamps on the cogs from manufacturing. They had no idea this was in their old freewheel pile. It isn't an Ultra but still should help with experimenting with the XC Pro.

    Thanks again for all of your assistance mrmw. By the way I'm the guy that also asked you to upload the high resolution instructions. I didn't realize this until I looked up your other post. Suntour Command Shifters Installation Questions

    Thanks,
    BL

  9. #9
    Senior Member
    Join Date
    Dec 2005
    Location
    Atlanta
    My Bikes
    1982 Schwinn Super Sport S/P, 1984 Miyata 610, 1985 Panasonic LX 1000
    Posts
    579
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Frickencrazy View Post
    Update- I installed the new Command Shifter for the RD with the 5000 and man it works like a charm! First Accushift setup that actually works. I'll probably play around with this for while and then swap over to a different RD with a 7 cog freewheel. Last weekend I purchased a Suntour XC Pro for $12 and also a Suntour AP 7 cog w/4 notch @ the local bike co-op for $8 in practically new shape. You can still see the stamps on the cogs from manufacturing. They had no idea this was in their old freewheel pile. It isn't an Ultra but still should help with experimenting with the XC Pro.

    Thanks again for all of your assistance mrmw. By the way I'm the guy that also asked you to upload the high resolution instructions. I didn't realize this until I looked up your other post. Suntour Command Shifters Installation Questions

    Thanks,
    BL
    I'm on the prowl for an Accushift Plus 4 notch 7 cog freewheel like 13-28 if you see another one, pls PM me.

Posting Permissions

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