Advertise on Bikeforums.net



User Tag List

Results 1 to 12 of 12
  1. #1
    Member lumpynose's Avatar
    Join Date
    Apr 2010
    Location
    Concord, California
    My Bikes
    Trek, Motobecane
    Posts
    38
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    shifters are "backwards"?

    I bought the Mercier Galaxy from Bikes Direct; the web site says that it comes with Shimano 8-speed STI shifters. (Is STI the model name or simply some generic term for the type of shifters?)

    On the shifters they say Shimano Sora Flight Deck. They don't have a visual indicator to tell you what gear you're in.

    My other bike, a Trek, which also has Shimano Sora shifters, but they have a visual indicator. With those shifters, pushing the brake lever sideways shifts to larger gears, closer to the spokes, and pushing the little thumb lever shifts to the smaller gears, away from the spokes.

    But with the Mercier Galaxy it's the opposite; the thumb lever shifts to larger gears and the brake lever shifts to smaller gears. Has anyone else seen this; is this normal?

  2. #2
    Senior Member
    Join Date
    Mar 2005
    Posts
    1,441
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Some derailleurs are set up this way, with the spring pulling towards the lower (larger cogs) gears. I forget what these are called, or what the supposed advantage is, but they are not uncommon.

  3. #3
    Senior Member clydeosaur's Avatar
    Join Date
    Aug 2009
    Location
    Central PA
    My Bikes
    Cannondale Six5, Specialized Stumpjumper FSR & old Hard Rock
    Posts
    478
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I had an older (02 maybe??) Trek 1000 w/ Sora on it. No shift indicators & the thumb button shifted (dropped the gear)to the next smaller sprocket as well. The brake lever shifted in to the next largest. I can't imagine putting the strain of retracting or climbing the derailleur on those little thumb bars.

  4. #4
    Senior Member CACycling's Avatar
    Join Date
    Feb 2008
    Location
    Oxnard, CA
    My Bikes
    '08 Fuji Roubaix RC; '07 Schwinn Le Tour GS; '92 Diamond Back Ascent EX
    Posts
    4,390
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    With high-normal derailers, the derailer spring moves the chain to larger cogs and the shift lever pulls it to smaller cogs. There is no additional strain on the thumb lever as it is just releasing tension like it would on low-normal derailers.

  5. #5
    Member lumpynose's Avatar
    Join Date
    Apr 2010
    Location
    Concord, California
    My Bikes
    Trek, Motobecane
    Posts
    38
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Bikewer and CACycling got it; pushing the brake lever sideways is increasing the cable tension, but it's moving the derailleur in the opposite direction from the way it works on my Trek. It never occurred to me that things could be different like that. It will definitely be confusing having two bikes with different shifting behavior. I will also miss the visual display of the gear I'm in. But I bought the Mercier intentionally as a "budget" bike so I'm not complaining.

    Thanks for the responses.

  6. #6
    Senior Member
    Join Date
    Apr 2006
    Posts
    2,104
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Shimano called this "rapid rise" and it is another case of Shimano inventing something that was not needed or wanted but was used as a sales tool. Roger

  7. #7
    just pokin' along desertdork's Avatar
    Join Date
    Aug 2008
    Location
    the desert
    Posts
    1,014
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by CACycling View Post
    With LOW-normal derailers, the derailer spring moves the chain to larger cogs and the shift lever pulls it to smaller cogs. There is no additional strain on the thumb lever as it is just releasing tension like it would on HIGH-normal derailers.
    Fixed. You had it backwards.

  8. #8
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    35,866
    Mentioned
    15 Post(s)
    Tagged
    0 Thread(s)
    I wish the high normal front derailleur was still made and in a decent quality,
    having the cable pull the cage towards the
    low gear was a boon for late down shifters on a climb.
    then spring would pull both front and rear into the highest ratio.

  9. #9
    Bianchi Goddess Bianchigirll's Avatar
    Join Date
    Apr 2009
    Location
    Camp Hill, PA
    My Bikes
    Too many to list here check my signature.
    Posts
    19,027
    Mentioned
    5 Post(s)
    Tagged
    1 Thread(s)
    STI = Shimano Total Intergration. what that mean is that starting in about 1990 shimano started to do everything they could to ensure bike makers had to use complete shimano 'kits' on a bike.

    they mounted the MTB shifters on the brake levers, so you could not have shimano shiftin and Dia Compe brakes.

    they also lightened the sring in the road calipers (this was also part of SLR) and put a spring in the brake lever to return the lever to the starting point and pull the cable back. rather than rely on the caliper spring to this. result shimano calipers did not work as well with a non SLR or STI brake lever.

    for the road STI/SLR finally morphed into the integrated shifter/brakelever AKA "Brifter"
    Bianchis '87 Sport SX, '90 Proto (2), '91 Boarala 'cross, '93 Project 3, '88 Trofeo, '86 Volpe, '89 Axis, '79 Mixte, '99 Mega Pro XL Ti, '97 Ti Megatube, , '90 something Vento 603,

    Others but still loved,; '80 RIGI, '80 Batavus Professional, '87 Cornelo, '86 Bertoni (sold), '09 Motobecane SS, '98 Hetchins M.O., '09 K2 Mainframe, '89 Trek 2000, '?? Jane Doe (still on the drawing board), '90ish Haro Escape

  10. #10
    Senior Member CACycling's Avatar
    Join Date
    Feb 2008
    Location
    Oxnard, CA
    My Bikes
    '08 Fuji Roubaix RC; '07 Schwinn Le Tour GS; '92 Diamond Back Ascent EX
    Posts
    4,390
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by desertdork View Post
    Fixed. You had it backwards.
    Thanks. I do that a lot.

    I assume it is only the rear that shifts this way (haven't seen FDs like this lately). If that is the case, swapping out the RD with a standard one would be pretty cheap and a lot less confusing. Sell the old RD to offset the cost.

  11. #11
    Member lumpynose's Avatar
    Join Date
    Apr 2010
    Location
    Concord, California
    My Bikes
    Trek, Motobecane
    Posts
    38
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by CACycling View Post
    I assume it is only the rear that shifts this way (haven't seen FDs like this lately). If that is the case, swapping out the RD with a standard one would be pretty cheap and a lot less confusing. Sell the old RD to offset the cost.
    If I remember correctly the front one is similar; pushing sideways on the brake lever shifts shifts "backwards" to how it is on my other bike. But I like your suggestion of changing the derailleur(s).
    Experience is that marvelous thing that enables you to recognize a mistake when you make it again. -- F. P. Jones

  12. #12
    LBS Employee/Commuter
    Join Date
    May 2008
    Location
    Madison Heights, MI
    My Bikes
    2007 Trek Soho, 2010 Gary Fisher Monona w/ Xtracycle FreeRadical, 198X Facet BioTour 2000
    Posts
    243
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Summary:

    STI = Shimano Total Integration, a product design of integrating brakes and shifters into a single pod or brifter

    In a traditional (Also called: High-Normal, Bottom-Normal) rear derailleur, a movement of the Sora brifter's thumb release would decrease cable tension and move the chain to a smaller rear cog. A movement of the brake lever arm would increase tension and move the chain to a larger rear cog.

    In a Low-Normal (also called Top-Normal) RD, the thumb release would decrease cable tension and move the chain to a larger rear cog. Moving the lever arm would increase tension and move the chain to a smaller rear cog.

    For the follow up question about the front, it takes a lot of torque to move a chain from a small chainring to a big one, so all front derailleurs would move to the larger ring when cable tension was increased by moving the lever arm.

Posting Permissions

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