Advertise on Bikeforums.net



User Tag List

Results 1 to 4 of 4
  1. #1
    Senior Member Capecodder's Avatar
    Join Date
    Jul 2010
    Location
    Somewhere Between The Beginning And The End
    Posts
    1,991
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Shifter/Derailleur Copmpatability

    Can anyone tell me for sure if Shimano 600 SL-6208 shifter and a Shimano 600 6401 (Trocolor) rear derailleur are compatible on a 6 speed rear cluster?

    The shifters are said to be 6 speed and the rear derailleur 8 speed, but I'm not 100% sure if everything will work correctly together......

    TIA
    Amy, I'll always remember you...... I miss you so much, for you filled my days with so much joy.

  2. #2
    Senior Member Monster Pete's Avatar
    Join Date
    Apr 2010
    Location
    Warwick, UK
    My Bikes
    2000-something 3 speed commuter, 1990-something Raleigh Scorpion
    Posts
    1,048
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    IIRC, the sprocket spacing and cable pull are different for 5/6 and 7/8-speed. If you replace the existing 6-speed freewheel with a 7-speed one it should match up. If you're doing a mismatched setup like this, it's better to make the 'extra' shifter position 8th rather than 1st. That way, if you accidentally try to shift into the nonexistent 8th gear, all that will happen is the cable will go slack. If you used positions 2-7 instead, trying to shift to 1st could stretch the cable or pull it through the anchor bolt, messing up your shifting.
    I've got a bike, you can ride if you like it's got a basket, a bell that rings and things to make it look good- Pink Floyd, 1967

  3. #3
    Senior Member
    Join Date
    Apr 2009
    Location
    New Rochelle, NY
    My Bikes
    too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
    Posts
    19,977
    Mentioned
    31 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by Monster Pete View Post
    IIRC, the sprocket spacing and cable pull are different for 5/6 and 7/8-speed. If you replace the existing 6-speed freewheel with a 7-speed one it should match up.
    I don't get this. As you point the spacing of 6s and 7s freewheels is different. The indexing comes from the levers and the OP has 6s levers and a 6s freewheel, so it will match as is. Changing to a 7s freewheel, will yield mis-matched spacing (as you correctly point out), and one unusable sprocket.

    The fact that he has an 8s RD doesn't matter as much, since Shimano has been very consistent if the cable response ratio (how far the RD moves for any given cable movement) over the years. However if the RD and levers are many years apart in generation, the OP should confirm that the ratio is correct.
    FB
    Chain-L site

    An ounce of diagnosis is worth a pound of cure.

    “Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

  4. #4
    Senior Member Monster Pete's Avatar
    Join Date
    Apr 2010
    Location
    Warwick, UK
    My Bikes
    2000-something 3 speed commuter, 1990-something Raleigh Scorpion
    Posts
    1,048
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by FBinNY View Post
    I don't get this. As you point the spacing of 6s and 7s freewheels is different. The indexing comes from the levers and the OP has 6s levers and a 6s freewheel, so it will match as is. Changing to a 7s freewheel, will yield mis-matched spacing (as you correctly point out), and one unusable sprocket.

    The fact that he has an 8s RD doesn't matter as much, since Shimano has been very consistent if the cable response ratio (how far the RD moves for any given cable movement) over the years. However if the RD and levers are many years apart in generation, the OP should confirm that the ratio is correct.
    Yeah I misread it and thought we were dealing with 8-speed shifters. The derailleur itself doesn't really care, of course, as long as the cable pull matches the shifter.
    I've got a bike, you can ride if you like it's got a basket, a bell that rings and things to make it look good- Pink Floyd, 1967

Posting Permissions

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