Advertise on Bikeforums.net



User Tag List

Results 1 to 6 of 6

Thread: STI problems

  1. #1
    Senior Member cyclodan's Avatar
    Join Date
    Feb 2004
    Location
    S.E. Mi.
    Posts
    277
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    STI problems

    Seems that Shimano 9 speed Ultegra & Dura ace shifters are prone to failure especially when exposed to particularly dirty environments like a cyclocrosser is. They will shift to larger cogs/rings but will not release to shift to smaller ones. Two questions: Anyone know of a service that rebuilds STI shifters? Did Shimano ever fix the problem?

  2. #2
    Member
    Join Date
    Oct 2004
    Location
    Portland Oregon
    My Bikes
    Litespeed Arenberg, Litespeed Atlas, Fuji Track, Trek Fuel 90, Felt S32 TT bike, Bianchi Axis '05, and a lot of older bikes...
    Posts
    41
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I haven't heard of a re-build service. Several people I know in Portland claim that 105 is more resistant to grit and the elements in general than Ulltegra or Dura Ace.

    You've probably already tried re-cabling with new housings- but if not, try that before chucking the levers. If all else fails, you can flush the lever assembly with teflon chain lube to wash out the contaminents. Once you start putting lubricants in your levers, you have to keep doing it. It will start collecting debris more easily and require flushing more often.

    Hopefully cables and housing will clear it for you.

    One last thing- make sure your chain and cogs aren't really worn. Worn chains shift late when the shift at all.

  3. #3
    Bike Shop Girl Arsbars's Avatar
    Join Date
    Oct 2002
    Location
    Mooresville, NC
    My Bikes
    Lots, road - mtb - cyclocross- commuting
    Posts
    682
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    There is minimum parts you can rebuild in the STI system. That's one reason I like to go with Campy.

    On another note, I agree with Ultegra/105 being a bit more durable....I've had 105/Ultegra equipped cross bikes in the past that I put through hell.. with a through cleaning every once in awhile you should be good.
    BikeShopGirl.com : Helping women find their way in cycling
    CommuteByBike.com : Tips, news, reviews and safety for bike commuters

  4. #4
    The 'net ruined cycling ajkloss42's Avatar
    Join Date
    Jul 2004
    Location
    Minneapolis, MN USA
    My Bikes
    Steelman Eurocross, Peugeot U08 fixie, Specialized Expidition, Raleigh Sprite 27, Serotta CDA
    Posts
    257
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I froze water inside an Ultegra shifter. When it finally thawed out, it worked okay for a while but eventually siezed up in the halfway position. My right shifter is starting to get a bit clunky, but new housings and cables did make a huge difference, so much so I think I'll replace the rear housings everytime I replace tires.

  5. #5
    Senior Member
    Join Date
    Oct 2004
    Posts
    49
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I've actually found that this can usually be fixed by simply changing the cable tension, may wanna try that if you haven't yet.

    my two cents,
    Dave

  6. #6
    Senior Member
    Join Date
    Oct 2004
    Posts
    49
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    also, if you're looking to perhaps rebuild them yourself you can get parts at http://aebike.com/site/page.cfm?PageID=30&Category=1499

Posting Permissions

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