Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Recreational Cyclocross and Gravelbiking This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like :The Dirty Kanza". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 11-05-07, 11:31 AM   #1
FigBug
Senior Member
Thread Starter
 
FigBug's Avatar
 
Join Date: Jun 2006
Bikes: Glacier Team Ice, Cannondale XR800, Rocky Mountain Hammer Race, Specialized Big Hit Comp, Fuji Track Pro, Burley Tosa, Fiori Roma
Posts: 111
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Chain keeps falling off

My chain keeps falling of during races, usually when I'm putting my bike down. Anything I can do to keep it on? I'd like to keep my large chain ring, since I also commute on the bike. Should I shorten the chain for cross races?
FigBug is offline   Reply With Quote
Old 11-05-07, 11:39 AM   #2
pfwitucki
Junior Member
 
Join Date: Jul 2006
Bikes:
Posts: 14
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Make sure you set your bike down gently. Tough to remember in the middle of a race, but worth it. I got lazy at a couple races in the beginning of the season and dropped the bike (and chain), but a conscientious effort has fixed the problem.

Shortening the chain may help too.

Are you consistently losing it on one side? Which side?
pfwitucki is offline   Reply With Quote
Old 11-05-07, 11:39 AM   #3
xthugmurderx
poser/hipster/whatever
 
xthugmurderx's Avatar
 
Join Date: Apr 2005
Location: milwaukee, philly, and back, minneapolis in july
Bikes: d/a allez -trek t1
Posts: 994
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
yes. turn the limit screw a bit to tighten up the gap. (if that doesn't make sense, take it to a shop). that should help, i assume. maybe the derailleur is also too high? take a few pictures and post them. one looking at the crank, and the other one with the chain in the big ring from the top down. that'll help.
xthugmurderx is offline   Reply With Quote
Old 11-05-07, 11:47 AM   #4
bitterken
Senior Member
 
Join Date: Apr 2005
Location: MD
Bikes:
Posts: 773
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You could also install a chain keeper like Third Eye or the like to keep the chain from falling off to the inside of the small ring. I dropped my chain twice during my first season. After installing a Third Eye and getting better at gently putting the bike down vs. dropping, I've never dropped it again in the 25+ races since.
bitterken is offline   Reply With Quote
Old 11-05-07, 12:10 PM   #5
FigBug
Senior Member
Thread Starter
 
FigBug's Avatar
 
Join Date: Jun 2006
Bikes: Glacier Team Ice, Cannondale XR800, Rocky Mountain Hammer Race, Specialized Big Hit Comp, Fuji Track Pro, Burley Tosa, Fiori Roma
Posts: 111
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It always falls off of the inside of the small chain ring. I think it is falling off of the bottom of the chain ring first, as once, when i went to pick up my bike, I noticed than the chain was off the bottom, but still on a few teeth on the top, so I pushed the crank with my hand as I was shouldering the bike and I got the chain back on. I'll post photos when I get home.
FigBug is offline   Reply With Quote
Old 11-05-07, 02:37 PM   #6
xthugmurderx
poser/hipster/whatever
 
xthugmurderx's Avatar
 
Join Date: Apr 2005
Location: milwaukee, philly, and back, minneapolis in july
Bikes: d/a allez -trek t1
Posts: 994
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
well then i'm totally wrong. but it could be that same problem on the inside. try a 3rd eye (i use an N-stop gear jump thing.). that should fix it
xthugmurderx is offline   Reply With Quote
Old 11-05-07, 09:37 PM   #7
sfcrossrider
Senior Member
 
sfcrossrider's Avatar
 
Join Date: Mar 2006
Location: San Francisco
Bikes: Steelman eurocross, Surly CrossCheck, IRO Rob Roy...
Posts: 2,760
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by pfwitucki View Post
Make sure you set your bike down gently. Tough to remember in the middle of a race, but worth it. I got lazy at a couple races in the beginning of the season and dropped the bike (and chain), but a conscientious effort has fixed the problem.

Shortening the chain may help too.

Are you consistently losing it on one side? Which side?
+1

Don't drop your bike.
sfcrossrider is offline   Reply With Quote
Old 11-05-07, 10:26 PM   #8
ajs26
Senior Member
 
Join Date: Dec 2004
Location: Illinois
Bikes: K2 3.0 ZED
Posts: 108
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
i put my third eye back on. but also i swapped out my mid cage rd which i did not need for a short cage rd, which allowed me to shorten my chain up by 5 or 6 links. being more gentle when setting the bike down has also helped.
ajs26 is offline   Reply With Quote
Old 10-16-09, 10:37 AM   #9
arcellus
Senior Member
 
arcellus's Avatar
 
Join Date: Oct 2003
Location: pdx
Bikes:
Posts: 379
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reviving this old thread after a search - I'm having the same problem as the OP. My chain is constantly (2-3 times per race) falling off to the inside, and it's driving me nuts. My setup is:

1x9 - 36t in front, 11-25 in back
Ultegra Short Cage Rear Der
N-Gear Jump Stop chain keeper

I've experimented with the Jump Stop's adjustment quite a bit, but it's still not doing the job. At my last race, the chain fell off to the inside and jammed under the Jump Stop so badly that it took the better part of two minutes to get it back on, costing me at least 30 places or so. In my haste to get the chain back on, I moved the Jump Stop so that it rubbed loudly when in the top two or three cogs. Two laps later, crossing a set of barriers I lightly grazed the second barrier with my rear wheel and it went off again to the inside. Luckily I was able to quickly replace it.

What could I be doing wrong? I've already tried shortening the chain by two links, should i shorten it more? Those of you who use those plastic chain keepers, do you have this same problem?
arcellus is offline   Reply With Quote
Old 10-16-09, 10:51 AM   #10
hocker
Senior Member
 
hocker's Avatar
 
Join Date: Jul 2008
Location: Denver
Bikes: Road and Mountain
Posts: 619
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by arcellus View Post
My chain is constantly (2-3 times per race) falling off to the inside, and it's driving me nuts. My setup is:
1x9 - 36t in front, 11-25 in back
Ultegra Short Cage Rear Der
N-Gear Jump Stop chain keeper
I thought the Jump Stop was designed so your chain can't fall off to the inside? With a single chain ring in front it would make sense if it fell off to the outside because you aren't running a chain guard. Are you dropping the bike too hard? 2-3 times per race is unexceptionable and I hope you figure this out.

For $52 you can get a Paul's chain keeper and the problem is solved.
hocker is offline   Reply With Quote
Old 10-16-09, 10:59 AM   #11
arcellus
Senior Member
 
arcellus's Avatar
 
Join Date: Oct 2003
Location: pdx
Bikes:
Posts: 379
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yeah - you're telling me! I've been having great races lately except for dropping the chain. It's incredibly frustrating. I'm definitely conscious of dropping the bike too hard, and feel that in general I'm pretty gentle with it - after watching rider after rider losing their chain by dropping their bike too hard at the top of a steep runup a while back, I vowed to avoid it at all costs.

I know that's the idea with the Jump Stop - it's just not working for me. I'm going to try again, moving it as close as possible to the chain while it's on the largest cog and dealing with the small amount of rub noise, but I'm not confident that it's going to work.

Forgot to mention that I am using a chain guard, and losing the chain to the outside has never been a problem.
arcellus is offline   Reply With Quote
Old 10-16-09, 11:03 AM   #12
jonestr
Senior Member
 
Join Date: Jul 2008
Location: ABQ, NM
Bikes: Neuvation F100, Surly Cross Check, Van Dessel Holeshot
Posts: 1,152
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
your chain length should be such that your derailleur pulleys line up with each other, and are perp to the ground when in your smallest cog.
jonestr is offline   Reply With Quote
Old 10-16-09, 11:09 AM   #13
arcellus
Senior Member
 
arcellus's Avatar
 
Join Date: Oct 2003
Location: pdx
Bikes:
Posts: 379
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Ok - good advice there, I think my chain is a bit longer than that. I'll check that out.
arcellus is offline   Reply With Quote
Old 10-16-09, 11:25 AM   #14
darkmagus
Senior Member
 
darkmagus's Avatar
 
Join Date: Nov 2008
Location: Portland, OR
Bikes:
Posts: 256
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Run a bash ring on the inside and outside. I'm pretty sure that will end the chain dropping.
darkmagus is offline   Reply With Quote
Old 10-16-09, 12:07 PM   #15
jfmckenna
Tiocfáidh ár Lá
 
jfmckenna's Avatar
 
Join Date: Dec 2003
Location: The edge of b#
Bikes: A whole bunch-a bikes.
Posts: 5,440
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Bash rings are the best solution but a FD works just as well too. Just get an old junker front derailleur and fix it on there. You can even bend the cages if necessary for cross chain rub.
jfmckenna is offline   Reply With Quote
Old 10-16-09, 12:36 PM   #16
flargle
Senior Member
 
Join Date: Jul 2007
Bikes:
Posts: 2,118
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Chain Length Sizing

flargle is offline   Reply With Quote
Old 10-20-09, 11:41 AM   #17
arcellus
Senior Member
 
arcellus's Avatar
 
Join Date: Oct 2003
Location: pdx
Bikes:
Posts: 379
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Problem solved - too much chain. Shortened it by 3 links, no more chain drop. Thanks!
arcellus is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 07:47 PM.