Gear problems

alexp90
alexp90 Posts: 15
edited July 2007 in MTB workshop & tech
Im having some trouble with the rear derailleurs on my bike, Its an shamino deore LX i think.
I have 9 gears on my rear wheel and when i put it into 7th (i think) it dosnt switch, then when i go to 8 it jumps from 6-8 and then from 8-7 and 7-8 as it pleases as im riding. However it doesnt do this when i put the bike upside down and just spin the pedals and theres no pressure on the "system" as it where. Any suggestions? :(

Comments

  • nicklouse
    nicklouse Posts: 50,675
    what bike?

    is the cassette clean between the cogs.
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  • rubber side up
    rubber side up Posts: 2,150
    Are the end stops on the mech setup properly? How old is the chain? How old is the cassette?
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  • supersonic
    supersonic Posts: 82,708
    Check your cables for gunk and tension.
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  • Drfabulous0
    Drfabulous0 Posts: 1,539
    At check your hanger alignment, jockey wheels and that the wheel is fitted correctly.
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  • exmachina
    exmachina Posts: 57
    alexp90 wrote:
    Im having some trouble with the rear derailleurs on my bike, Its an shamino deore LX i think.
    I have 9 gears on my rear wheel and when i put it into 7th (i think) it dosnt switch, then when i go to 8 it jumps from 6-8 and then from 8-7 and 7-8 as it pleases as im riding. However it doesnt do this when i put the bike upside down and just spin the pedals and theres no pressure on the "system" as it where. Any suggestions? :(

    I had a similar problem ..the cable was too tight..
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  • alexp90
    alexp90 Posts: 15
    Right did some work and reajusted end points.
    Now it seems to go 1-2 fine. 3-4 fine. BUt from 4-5 it seems to stay at 4 or skip to 6. then 7-8-9 is fine but sometimes it dosnt go from 9-8 but jumps from 9-7 when i switch to 7.
    The bikes about 4 years old so thats probably a factor too. But i have no money to do repairs :( So anyone got any good bodge jobs they know of :P
  • nicklouse
    nicklouse Posts: 50,675
    is this happening in the stand or on a ride?

    and again what bike?
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • alexp90
    alexp90 Posts: 15
    hapens when im riding. And its some halfords job from about 4 years ago so im unsure on what type of bike
  • nicklouse
    nicklouse Posts: 50,675
    a fully or a HT or a ridged?
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • alexp90
    alexp90 Posts: 15
    a crappy full sus
  • nicklouse
    nicklouse Posts: 50,675
    right. it sounds like the cables do need replacing.

    as the sus is working the friction between the inners and outers is causing the mech to move. if the cables are new then it will be poor routing or an outer some where is too short.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • sunsetyellow
    sunsetyellow Posts: 5
    It may be worth cleaning your entire drivetrain first though. My '05 Kona did this for a bit until I attacked the chain and cassette with degreaser and then relubricated. Of course it may not work either... :?

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