Rear Cog
12-07-05, 07:10 PM
#1
Junior Member
Thread Starter
Join Date: Dec 2005
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Rear Cog
when i am in about 3-5th gear it jumps around or the pedals just freewheel. anyone know what to do or why this is the case?
12-07-05, 07:59 PM
#2
如果你能讀了這個你講中文
Join Date: Feb 2005
Location: New York
Posts: 3,542
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Clarity is lacking.
Do you mean big ring in front and 5th (from bottom, from top) in back?
How many speeds?
What sort of setup (roadbike, mountain bike, bike from kmart?)
What jumps around?
When you say that the pedals freewheel, do you mean that the cranks jsut spin?
Do you mean big ring in front and 5th (from bottom, from top) in back?
How many speeds?
What sort of setup (roadbike, mountain bike, bike from kmart?)
What jumps around?
When you say that the pedals freewheel, do you mean that the cranks jsut spin?
12-07-05, 07:59 PM
#3
Senior Member
What's your setup? If your chain is jumping when it's in your most frequently-used cogs, it could be that the cogs are starting to get worn-out. This will be particularly noticeable if you've got a new chain. But your description is rather unclear. Can you tell us more?
__________________
"c" is not a unit that measures tire width
"c" is not a unit that measures tire width
12-07-05, 08:46 PM
#4
Senior Member
Join Date: Feb 2005
Location: Oklahoma
Posts: 9,438
Bikes: Trek 5500, Colnago C-50
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 7 Times
in
6 Posts
This is common if you install a new chain on worn out cogs. Or you may simply need a shift cable adjustment.
Al
Al
12-07-05, 09:20 PM
#5
Junior Member
Thread Starter
Join Date: Dec 2005
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
sorry guys. im on a road bike with 2 chain rings on the front and 10 on the back. the bike is about 4 days old and on the 4 largest cogs on the back groupset, the chain will jump up or down a cog or just sort of freeze, or the chain doesnt connect with anything and my front crank freewheels and is most uncomfortable. hope this helps
12-07-05, 10:37 PM
#6
Senior Member
Join Date: Sep 2001
Location: Montreal
Posts: 6,521
Bikes: Peugeot Hybrid, Minelli Hybrid
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
Try adjusting the shifter cable tension (where the cable goes into the rear derailler) 1/4 turn in either direction. Better idea is to take the bike back to the place you bought it and get them to adjust. Could also be a bent derailler hanger.
12-07-05, 11:07 PM
#7
Senior Member
Join Date: Feb 2005
Location: Oklahoma
Posts: 9,438
Bikes: Trek 5500, Colnago C-50
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 7 Times
in
6 Posts
Also be sure you have a 10-speed chain. The problem in the rear sounds like a need for a shift cable tension. When the cranks turn and the chain is not engaged is the chain spinning around the cassette cogs or is it lifting off of the front chainrings?
If you bought the bike from a bike shop you should get a free tuneup including cable adjustments.
Al
If you bought the bike from a bike shop you should get a free tuneup including cable adjustments.
Al
12-07-05, 11:39 PM
#8
Junior Member
Thread Starter
Join Date: Dec 2005
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
yep the chain is kind of riding on the edge of the rear cogs, only 3 of them though. yep im racing it tonight anyway with it like that and taking it down to the shop over the next couple of days
12-08-05, 03:12 AM
#9
Senior Member
Join Date: Sep 2003
Location: fogtown...san francisco
Posts: 2,276
Bikes: Ron Cooper, Time VXSR, rock lobster, rock lobster, serotta, ritchey, kestrel, paramount
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
on a new bike, the cables will strench out. turn the cable adjusters.
