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Caint get the gear shifter to work on my roadmaster mt sport 16 gear bike

The shifters wont turn so I can shift gears

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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cogdoc
  • 7 Answers

SOURCE: Ultegra Flight Deck shifter problem

My guess is the shift cable has slipped, only allowing you the top end of the rachet positions. Drop the shifter to the very lowest cog, make sure the cable is tight, and adjust the tension at the derailleur so that on the first single click it climbs one gear, and isn't noisy there. More tension 9 winding the barel out ) causes it to rise, less, to drop down. It should then hopefully select all the gears, unless the upper stop, the L screw is set too low. This screw stops the derailleur hitting the spokes and going past 1st gear. That shouldn't ever change though.

Posted on Jul 01, 2009

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  • 61 Answers

SOURCE: shimano tiagra 9 speed shifters how to change gear

Go to http://techdocs.shimano.com/techdocs/index.jsp

Search in drop down list to go to all tiagra items and identify your particular components. Shimano are good at numbering their parts and you should find the number you seek on the bicycle component. You will usually be able to download an exploded parts diagram and service instructions. The service instructions are prefixed by the letters SI.

Posted on Nov 22, 2009

dunnbiker
  • 8546 Answers

SOURCE: Hi, Just bought a new bike with shimano tiagra

You don't mention which shifter(s) malfunction or if you're even pedaling the bike while shifting (I make NO assumptions).

If you operate the inner shift lever (NOT the brake lever) on each side through several clicks that should RELAX any tension in the shifter cables. Then if you pick the bike up and pedal it forward a couple of turns the front shifter should drop the chain the the lowest chainring and the rear derailleur should shift out the the smallest cog.

With the bike suspended (say, hanging from a low tree branch by the tip of the seat) you should be able to turn the cranks and manually pull sideways on either exposed shifter cable where it runs down along the downtube then release it.

This should cycle each respective derailleur through its entire range. If the cables don't travel sufficiently in this manner, the shifters will never make them do it either.

Perhaps you could CALL the Bike Shop and they would talk you through a quick operational check.

Posted on Apr 27, 2010

agent91
  • 2100 Answers

SOURCE: how to use thumb shifters on a 21 speed Schwinn Highplains bike

OK, for a beginner in the world of 18 speed bikes, put the chain on the big sprocket up front, it should be about 46 teeth, make sure it is center and doesn't make noise, if it does, adjust it just a hair either way, now, the rear, put the chain on the big sprocket in the rear, make sure the front didn't start making noise, if it did, adjust it again. You are now ready to take off, in low gear, as you start out, it is easy to pedal, soon you will be peddling air, shift into second gear in the rear only, don't touch the front. Just a little push with the thumb will make it shift, now were going faster, easy peddling, shift into 3rd, then 4th, etc, coming to a stop, down shift the back sprocket back into low gear (big sprocket) and be ready to take off again. Soon you will be shifting that thing like a Ferrari! The front sprocket, will be used for moderate terrain, wheelies, and mountain climbing, that will come later, learn how to shift the rear first. As each gear climaxes, hit the shifter, it will get smoother as you go, and keep the chain quiet, no climbing on the next sprocket or falling out of gear. Hope this helps.

Posted on May 03, 2010

  • 190 Answers

SOURCE: My daughters mt sport sx

phililisa03-

This problem is caused by improperly adjusted derailers/shifters, the mechanism that move the chain from one gear to the next. It is not uncommon for the derailers to be out of adjustment after sitting unused through the winter. Over time the cables that run between the shifters and the derailers stretch just a bit and the derailers no longer work as well without a little tuning up. Unfortunately, for the novice, adjusting the derailers is frustrating at best. The effort and patience it requires is nothing to take lightly. If you're game for giving it a try, there are a number of websites out there that will provide extensive guidance on the process - just "google" how to adjust bike derailers" and you will find plenty of options. My local bike shop will make adjustments like this for a small set price, around $20 or so - you may have a shop nearby that will do the same.

Hope this helps.

Regards,

DIYpro

Posted on May 03, 2011

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