Chain Tools
October 8, 2010 – 12:38 pm | No Comment

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Home » Cycling

mountain bike chain too loose?

Submitted by on March 30, 2010 – 10:14 am7 Comments
chain tools
dlax1532 asked:

im goin bikin early tomorrow and dont have time to go to the shop. how can i do this myself without any extremely specialized tools?

well i got the bike used and i can tell its been through alot. im pretty sure the chain is loose because it keeps skipping on the gears when i go up a hill and put tension on the chain. if this sounds like something else let me know

7 Comments »

  • samchuckabutty says:

    The only way I could think of tightening it without a link extractor would be to see if you could loosen the nuts on the back wheel and pull the wheel back as far as you can on the dropout then hold it there and tighten again.

    I’d be tempted to hold of until you can get a new chain,safety first and all that.

  • badbadleroybrown says:

    Depending on how loose we’re talking about here, you can pick up some of the slop using the b-screw or b-nut or whatever they call the nut that sets the distance of the rear-d from the cogs… Typically, there’s about 6mm between the rear-d’s guide wheel and the cogs… You could probably get by with 8mm until you can get to a shop but its generally not a good idea.

    Your best bet is to just go to the shop and have a link removed although this is kind of a weird problem… Did you just put the chain on or something… How did it suddently become so loose its an issue?

    EDIT- It sounds like you have a derailleur problem moreso than a chain length problem. If your rear d is slightly out of alignment, it will work OK on most stuff but when you really start applying torque, it starts skipping off the cog. From what you’re saying about it being used and showing it, I’d say taking it in for a tune-up is going to be your best bet.

  • Spiky says:

    Well you could shorten the chain length but you need tools. But chain tensioners you need to buy it but you dont have time to go to the shop. I guess you’ll just have to stick to one gear until you can go to the shop, sorry.

  • MtBikr says:

    If this bike has gears and not a single speed the problem is that most likely that your shifter cables are out of adjustment. If it is a single speed bike check it could be the gears or chain are worn out.
    One of these two sites should help.

  • mtnbiker8712 says:

    try taking some of the links out with a chain tool

  • extitude says:

    Your rear derailleur has four adjustment screws.Two are stoppers for your chain when going from top gears to lowest gears so the chain does not move off the top most and lowest rings.
    At the back of your derailleur there is a tensioning *****.This can help but I reckon your problem can be fixed by using the 4th adjustment,being your rear barrel adjuster on the derailleur where the cable enters.A skipping chain may take but a half of a turn ,at times, but fiddle around to get the desired feel.You may also change this by your shifters barrel adjuster but this is the last place I go to as the shifter barrel is usually the weakest.Yet you can do this on the fly while driving.
    If these small adjustments are not enough then your actual cable to your rear derailler might need to be retentioned.To do this you must have your shifter set to the smallest gear in the rear.If your bike is set to this then feel the cable,tug it a bit.If there is any slack at all this is too much.Then go to your gear changer on the bar and ***** it all the way in,totally,then turn your rear deraileur screw[at the cable entry point] all the way in.Then Unscrew your cable lock nut [where the cable is locked,the end of the cable]and use a pair a plyers or needlenose plyers to pull it tight.Then tighten the lock *****.
    Then try your bike out and use the rear derailleur [cable entry] ***** to tighten a half turn at a time.To tweak it more ,then use your actual shifter barrel adjuster.
    This is not advice this is how it is done.
    I hope this can help you

  • User80 says:

    If it has gears it’s not the chain:
    All you need to do is adjust the gear cable, its as simple as;
    1)Holding the gear shifter in place
    2)Undoing the cable
    3)Having the shaft in place
    4)Pulling the cable tight and doing up the cable on the shifter.

    If you ever need any further help from me (brett.cass@yahoo.com)

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