Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take part in the February Giveaway for a Reflective Backpack & Spine Protector from RiderBag


What is wrong with my bike's gear shifting?
#1
my brand new mountain bike's shifting is very bad. the chain keeps moving between gears by its own and it doesnt shift right when i want it to. i must keep holding on the shift down hand a bit so that the chain stay in place.
i thought messing a bit with the limit screws would solve it but i think i have over done it and made it worse.
what should i do?
  Reply
#2
Limit screws do not have any effect on shifting between gears. A brand new bike will generally have free adjustments available for 30+ days - best to take advantage rather than risk messing up and maybe voiding the warranty. If you bought unassembled then consider a bike co-op for help if there's one nearby.
  Reply
#3
I have a 6 year old Next 18 speed mountain bike and it is not shifting at the rear very well and the front only works on two sprockets. It had been sitting for a considerable time outside. I rode it three days per week for about 8 to 10 miles for exercise. I had to revert to walking because of it.
It the cost of repair exceeds what I paid for it, I plan to let it go to charity.
  Reply
#4
(10-13-2014, 05:34 PM)Old Retired Petty Officer Wrote:  I have a 6 year old Next 18 speed mountain bike and it is not shifting at the rear very well and the front only works on two sprockets. It had been sitting for a considerable time outside. I rode it three days per week for about 8 to 10 miles for exercise. I had to revert to walking because of it.
It the cost of repair exceeds what I paid for it, I plan to let it go to charity.

If the levers move the derailleurs it's often just a matter of adjusting the cable and perhaps some lubrication. Bike co-op can help if you have one nearby, videos on this site are supposed to be pretty good, but I suggest you look at written instructions on a good site first. Google "adjust (front/rear) derailleur" - sheldonbrown.com and parktool.com sites are recognized as being the best.
  Reply
#5
(10-13-2014, 07:06 PM)cny-man Wrote:  
(10-13-2014, 05:34 PM)Old Retired Petty Officer Wrote:  I have a 6 year old Next 18 speed mountain bike and it is not shifting at the rear very well and the front only works on two sprockets. It had been sitting for a considerable time outside. I rode it three days per week for about 8 to 10 miles for exercise. I had to revert to walking because of it.
It the cost of repair exceeds what I paid for it, I plan to let it go to charity.

If the levers move the derailleurs it's often just a matter of adjusting the cable and perhaps some lubrication. Bike co-op can help if you have one nearby, videos on this site are supposed to be pretty good, but I suggest you look at written instructions on a good site first. Google "adjust (front/rear) derailleur" - sheldonbrown.com and parktool.com sites are recognized as being the best.

Thanks for the info cny-man!
  Reply


Possibly Related Threads...

Forum Jump:

[-]
10 Latest Posts
Can you help me find out which Koga Miya...
Today 02:42 PM
Chain for specialized rockhopper
Today 01:28 PM
How to stay safe while biking?
Today 01:20 PM
Cold toes during long bike rides
Today 12:40 PM
Singlespeed freewheel chain compability
Today 12:12 PM
How many people ride everyday?
Yesterday 07:05 PM
Tricycle rear axel removal
02-27-2021 07:52 PM
What kind of frame do I have here?
02-27-2021 03:01 AM
Restoration of a 1980 Falcon Road Bike
02-26-2021 01:39 PM
New bike
02-26-2021 12:52 PM

[-]
Top 5 Posters This Month
no avatar 1. Jesper
12 posts
no avatar 2. Criminal
10 posts
no avatar 3. Painkiller
7 posts
no avatar 4. ILv2MTB
5 posts
no avatar 5. JoJoJo
4 posts