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Old 10-03-2012, 01:20 AM   #1
albaraptor
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Bike not changing between 3 main gears

Ok so today I did some big hill climbs on my 2007 fuji newest and when I needed to go down or up? To my easier gears it wouldn't shift down. Any ideas on what it could be? Rear derailleur works fine going thru the 8 back there. Only problem is with the front. Any help would be appreciated.



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Old 10-03-2012, 01:30 AM   #2
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So...are you asking about shifting between the front chain rings?



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Old 10-03-2012, 01:46 AM   #3
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Is the deraileur mounted tightly to the frame?
Is the deraileur dirty?
Is anything caught in it?
When shifting from the large chain rings to the small chain rings the deraileurs movement is controled by the spring.
Is the Spring intact?

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Old 10-03-2012, 09:14 AM   #4
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As Davereo mentioned, check your derailleur is secured to the frame as if it has dropped/slid lower on the frame it will jam.

The spring that returns the derailleur to the lower gears could be broken.

Is the shift lever working correctly, some older bikes I have worked on recently have a shift lever that is sticking inside and wont release the shift therefore not releasing cable tension allowing the derailleur to swing inwards.

Check to see if you feel/hear a click sound or feel the shift lever engage when shifting up and back down at the front.

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Old 10-03-2012, 07:00 PM   #5
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Also check you cable. If it's stretched and too loose your shifting will suffer.

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Old 10-04-2012, 12:26 AM   #6
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Front derailleur limit screw may be impeding the travel of the derailleur in the small chainring direction.

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Old 10-04-2012, 12:48 AM   #7
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Are your cables corroded?

Is the cable jammed in the cable guide beneath the bottom bracket?

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Old 10-04-2012, 03:45 AM   #8
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Well, hate to admit this, but since it may help you and has an easy solution...

My front derailleur seized on me this summer. My LBS asked me if my electrolyte drink spilled, but I only ever ride with water, so that wasn't it. After a few additional questions we figured out that it was due to my sweat falling onto it and then drying. Was a really hot summer here in the mid-Atlantic area. A bit of hot water, followed by a good drying and some lubricant and I was back in business.

Might want to give that a try if you've not yet solved the problem.

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Old 10-05-2012, 03:50 PM   #9
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Quote:
Originally Posted by Rock_my_Roll View Post
Well, hate to admit this, but since it may help you and has an easy solution...

My front derailleur seized on me this summer. My LBS asked me if my electrolyte drink spilled, but I only ever ride with water, so that wasn't it. After a few additional questions we figured out that it was due to my sweat falling onto it and then drying. Was a really hot summer here in the mid-Atlantic area. A bit of hot water, followed by a good drying and some lubricant and I was back in business.

Might want to give that a try if you've not yet solved the problem.
A bit embarrassing, but great info, and a unique problem source! Great thing to remember. Thank you for sharing it.
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Old 10-05-2012, 08:16 PM   #10
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Thanks guys ended up taking it to LBS and they fixed it for $8.



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