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"Mike" wrote in message
... Howdy, I have an older (5 years maybe, not really sure) mountain bike. The shifting mechanisms it has a Shimano Altus ST-CT90s (See attached Picture). I've never had a problem with them until this year when I got my bike out. On this shifter, the thumb trigger is for shifting down and the finger trigger is for shifting up. THe thumb trigger works just fine. However when I try to Upshift with the finger trigger the ratcheting things inside there aren't catching on what they are supposed to. The only way I can get it to shif tis to apply a very strong pressure Down (towards the ground) as I pull the trigger forward. THen I can usually get it to catch inside and shift gears. I'm assuming I'll have to take my bike to some local bike shop but thought I'd psot on here first inc ase this is something anyone else has already seen. There may be dirt and crud built-up inside the shifter that's keeping it from working; but have you checked your derailleur? Is it clean and free of grass and debris? Are the cables lubed and moving freely from end to end? I'm willing to bet that your shifter is fine; but your derailleur and cables need maintenance. A new shifter cable is probably a very good idea. It will probably cure the problem. Just cleaning the jockey wheels on the derailleur may work miracles for your shifting. Barry |
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I can feel that when I'm pulling the trigger it's physically not connecting with the mechanism
inside. The problem is definitely in the part that's screwed on to the handle bars. I did take it apart and didn't see anything obviously dirty or bent or anything. Guess I'll have to have someone that knows what they are doing take a look at it. On Sun, 20 Jul 2003 17:55:12 -0500, "B. Sanders" wrote: "Mike" wrote in message .. . Howdy, I have an older (5 years maybe, not really sure) mountain bike. The shifting mechanisms it has a Shimano Altus ST-CT90s (See attached Picture). I've never had a problem with them until this year when I got my bike out. On this shifter, the thumb trigger is for shifting down and the finger trigger is for shifting up. THe thumb trigger works just fine. However when I try to Upshift with the finger trigger the ratcheting things inside there aren't catching on what they are supposed to. The only way I can get it to shif tis to apply a very strong pressure Down (towards the ground) as I pull the trigger forward. THen I can usually get it to catch inside and shift gears. I'm assuming I'll have to take my bike to some local bike shop but thought I'd psot on here first inc ase this is something anyone else has already seen. There may be dirt and crud built-up inside the shifter that's keeping it from working; but have you checked your derailleur? Is it clean and free of grass and debris? Are the cables lubed and moving freely from end to end? I'm willing to bet that your shifter is fine; but your derailleur and cables need maintenance. A new shifter cable is probably a very good idea. It will probably cure the problem. Just cleaning the jockey wheels on the derailleur may work miracles for your shifting. Barry |
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Thread | Thread Starter | Forum | Replies | Last Post |
Why has shifting improved? | David L. Johnson | General | 4 | July 15th 03 01:46 PM |