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

Best Black Friday E-Bike Deals 2024 | Up to $1,700 in Savings

New: Take Part in the November Giveaway: Starts November 18th


Gear shift problem from 7th to 8th rear sprockets
#1
Hello Folks,
My name is Girish and I recently bought Trek 4300.<br />
I experience below issue with the bike. Maybe something very simple to correct, but I’m a naive to this.
Here is what I face:<br />
When I shift from 7th to 8th number, the chain does not immediately jump on to the smallest sprocket (8th gear). However it moves only if I paddle very light and if otherwise, I hear a chain sound with the sprocket.
I tried adjusting the cable tension. If I add more tension to the cable (moving the cable tension adjuster anti-clockwise) then when I shift from 8th to 7th sprocket, the chain actually jumps onto the 6th sprocket, and if I reduce cable tension (moving the cable tension adjuster clockwise) it shifts correct from 8th to 7th. However, in either cases, if I shift from 7th to 8th, the chain does not jump swiftly onto the smallest sprocket.
Please can you help?
Many thanks,<br />
Girish

  Reply
#2
Try turning the high adjustment screw (should be marked with an H) anti-clockwise (i.e. letting the derailleur move further away from the wheel. This should work (I had a similar problem not so long ago)

  Reply
#3
It does sound like a problem with the cable tension. If you cannot find a good balance where you can't get it to shift right in both directions, it may be a cable problem or derailleur. Next thing I would try is taking the cable out, re-greasing it, and checking all the cable housing to make sure there are no kinks or splits. The cables need to have nice smooth bends and if there is a sharp turn anywhere it can mess up the shifting.
It could also be caused by a slight bend in the derailleur. If you look from behind the bike, the two pulley wheels should be exactly parallel to the cogs in the back and sit directly in line with the one of the gear that the bike is in. If anything looks like it is not perfectly in line, you might need to get some help to get the alignment fixed.

  Reply


Possibly Related Threads...

Forum Jump:

[-]
10 Latest Posts
Moving in Style: Beyond Regular Transpor...
Today 07:43 AM
Second wheelset for ebike.
Today 01:41 AM
Tire Sizing (Or How to Buy A Tire)
Yesterday 12:36 PM
The Roaming Radrunner Vlog 1 Why ride ...
Yesterday 09:17 AM
Recording Bike Rides
11-20-2024 01:37 AM
Ketone Ester $$$
11-19-2024 01:04 AM
Trek domane tyre
11-18-2024 01:58 PM
Old fossil buys Ebike
11-17-2024 06:39 AM
Bike bus
11-17-2024 12:14 AM
Humber "Eiffel Safety" bike 1800s
11-16-2024 03:05 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. Jesper
22 posts
no avatar 2. enkei
19 posts
no avatar 3. GirishH
14 posts
no avatar 4. Flowrider
11 posts
no avatar 5. ReapThaWhirlwind
11 posts