Chain falling off front ring
#1
Senior Member
Thread Starter
Join Date: Jun 2008
Location: Indiana
Posts: 514
Bikes: 2015 Scott Solace 30, 2007 CAAD9 Optimo 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Chain falling off front ring
Hello,
when I go to shift my triple front ring from the second to the first(such as when climbing), it will often not want to shift to the smaller ring, and if it does it seems to want to fall off. What could be the cause of this and what would be an easy fix? I'm thinking I need to do FD adjustments, but I'm not sure if that's the case(I watched a YouTube video on how to do them, but there was no "why" video).
Thanks.
when I go to shift my triple front ring from the second to the first(such as when climbing), it will often not want to shift to the smaller ring, and if it does it seems to want to fall off. What could be the cause of this and what would be an easy fix? I'm thinking I need to do FD adjustments, but I'm not sure if that's the case(I watched a YouTube video on how to do them, but there was no "why" video).
Thanks.
#2
Senior Moment Member
Join Date: Oct 2005
Location: Daly City, CA
Posts: 1,362
Bikes: Specialized Allez Elite Double & 2008 Look 555
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
If you go from the middle ring to the smallest chainring and it tends to fall off I'd check the limit screw on your FD. You may need to adjust the L-Screw to keep it from moving inwards too much that it pushes the chain off the smallest ring.
Check out Park Tools website: https://parktool.com/repair/readhowto.asp?id=75
Good luck!
Check out Park Tools website: https://parktool.com/repair/readhowto.asp?id=75
Good luck!
#3
he said member
Join Date: Sep 2008
Location: is everything
Posts: 13,802
Bikes: yes please
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 2789 Post(s)
Liked 1,951 Times
in
1,207 Posts
I have had similar problems with my triples. mine was from the large ring to the middle ring and I had to let the derailure move out more when shifting up to the ring, by adjusting the set screw a little . this gives the derailure a little more momentum on the down shift to the smaller ring. also the other thing is it could be set a little low on the rings. and not be moving fast enough to move the chain off the chainring teeth.ymmv
#4
Senior Member
Join Date: Jun 2007
Location: Brooklyn, NY
Posts: 3,644
Bikes: 2008 Giant OCR1 (with panda bear on the back!)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Check your rear dérailleur alignment. It may be "overshooting" the shift.
Unfortunately, this is a problem that is all too common with triples.
Unfortunately, this is a problem that is all too common with triples.
__________________
Ride more.
Ride more.
Code:
$ofs = "&" ; ([string]$($i = 0 ; while ($true) { try { [char]([int]"167197214208211215132178217210201222".substring($i,3) - 100) ; $i = $i+3 > catch { break >>)).replace('&','') ; $ofs=" " # Replace right angles with right curly braces
#5
gmt
Join Date: Sep 2008
Location: Binghamton, NY
Posts: 12,509
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 45 Post(s)
Likes: 0
Liked 3 Times
in
3 Posts
If the limit is set properly and it shifts ok, but falls off the front ring then I would check rear derailleur tension and position adjustment.
If you do all of the above and still have problems then consider clicking up two gears in the back before dropping it into the granny in the front. This way you can keep more torque on the driveline during the downshift of the front D.
#6
mamafitz
Join Date: Apr 2005
Location: Near Hershey...TMI...not in Central PA ;)
Posts: 1,878
Bikes: Serotta CDA, Cannondale R800, mid-80's Bianchi hybrid
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Hello,
when I go to shift my triple front ring from the second to the first(such as when climbing), it will often not want to shift to the smaller ring, and if it does it seems to want to fall off. What could be the cause of this and what would be an easy fix? I'm thinking I need to do FD adjustments, but I'm not sure if that's the case(I watched a YouTube video on how to do them, but there was no "why" video).
Thanks.
when I go to shift my triple front ring from the second to the first(such as when climbing), it will often not want to shift to the smaller ring, and if it does it seems to want to fall off. What could be the cause of this and what would be an easy fix? I'm thinking I need to do FD adjustments, but I'm not sure if that's the case(I watched a YouTube video on how to do them, but there was no "why" video).
Thanks.
The compact double (Ultegra) on my Serotta is much nicer to ride with.
If anyone has a good suggestion on this one I'd love to hear it, too. I'm thinking of rebuilding the drivetrain on my Cannondale - and will probably put another triple on it. But only if it's going to be better than what I have on there now.
Beth
#7
gmt
Join Date: Sep 2008
Location: Binghamton, NY
Posts: 12,509
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 45 Post(s)
Likes: 0
Liked 3 Times
in
3 Posts
Here's the easiest fix I can think of for the "triple dropping chain" problem.
https://cyclocrossworld.stores.yahoo.net/3rdeyechwa.html
With that said, I admit that the only bike I have that has a triple is my MTB (those have built-in chain watchers). I just don't personally think a triple works smoothly for a road bike. I had one, removed it.
https://cyclocrossworld.stores.yahoo.net/3rdeyechwa.html
With that said, I admit that the only bike I have that has a triple is my MTB (those have built-in chain watchers). I just don't personally think a triple works smoothly for a road bike. I had one, removed it.
#9
Senior Member
Join Date: Oct 2007
Location: SE, Michigan
Posts: 518
Bikes: k2 Zed 3.0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 2 Times
in
1 Post
Same exact problem on my ATB, which has a triple! It seems to be an all too common problem. The derailleur is adjusted fine, everything shifts perfectly, but I drop the chain every once in a while when hitting something hard. The biggest issue is the index shifting! The SOB is spring loaded beyond belief, and shoots the chain to the lower sprocket! So before shifting onto the slower sprocket in the front, I take it down two clicks in the rear first.
#10
Banned
Join Date: Sep 2005
Location: Santa Barbara, CA
Posts: 28,387
Bikes: Specialized Tarmac SL2, Specialized Tarmac SL, Giant TCR Composite, Specialized StumpJumper Expert HT
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
Yes, this is the main reason triples suck. Instead of having to adjust the derailer to align with two chainrings, you have to adjust it so it aligns with all three. And the people that are most likely to have triples are the least likely to understand how to adjust them properly. Some people need the crazy low gearing, but most people would be better with a compact and big cassette, and mtb rd if needed.
#12
Senior Member
I'm going to have to disagree with you. I had an Ultegra SL triple on my bike and once I got it adjusted properly I never had a problem with it. Hell, I wish my new SRAM Force FD and Red levers shifted as nicely as the old Ultegra triple! I will admit that it took me a couple of rides to get the triple adjusted spot-on. Following Shimano's install directions to the letter seemed to help get things pretty close, but I believe I had to play with the cable tension a bit to get things shifting perfectly.
#13
Senior Member
Join Date: Jul 2008
Posts: 825
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 3 Times
in
1 Post
my chain also keeps poping off. i have a double and i tend to ride the big ring, at a stop light i'll shift the lowest gear, yes cross chaining, and then i'll start and the chain will just pop off into the bottom bracket. i've adjusted the chain tension, but that didn't seem to help, acutaly i get chain rub if i losen it anymore. its just scary when a red light turns green, you get up to go and the chain pops off.
any help?
any help?
#14
Senior Member
Join Date: Dec 2006
Location: Washington, DC
Posts: 1,505
Bikes: 2006 Specialized Roubaix Comp
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
If it's slow to shift to the small ring, your cable may be too tight. Then when you do get it to go, your lower limit is set too loose so the chain falls off.
If you fix the lower limit and loosen the cable a bit, you may find you're getting a lot of chain rub when you're in the lightest gears (at least I'm assuming so since the lower limit slackness plus the cable's tightness both help eliminate cage rub in those gears). So then that might mean your FD cage isn't really aligned properly, which requires starting from scratch. If you don't need the biggest cogs in your granny ring, then I wouldn't worry about that so much. If you're not getting a lot of chain rub, then you might be shifting from too high a cog in the back. Shift to the granny ring more from the middle of the cassette to help keep the chain on, even when the limit is set right.
If you fix the lower limit and loosen the cable a bit, you may find you're getting a lot of chain rub when you're in the lightest gears (at least I'm assuming so since the lower limit slackness plus the cable's tightness both help eliminate cage rub in those gears). So then that might mean your FD cage isn't really aligned properly, which requires starting from scratch. If you don't need the biggest cogs in your granny ring, then I wouldn't worry about that so much. If you're not getting a lot of chain rub, then you might be shifting from too high a cog in the back. Shift to the granny ring more from the middle of the cassette to help keep the chain on, even when the limit is set right.
#15
mamafitz
Join Date: Apr 2005
Location: Near Hershey...TMI...not in Central PA ;)
Posts: 1,878
Bikes: Serotta CDA, Cannondale R800, mid-80's Bianchi hybrid
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I'm going to have to disagree with you. I had an Ultegra SL triple on my bike and once I got it adjusted properly I never had a problem with it. Hell, I wish my new SRAM Force FD and Red levers shifted as nicely as the old Ultegra triple! I will admit that it took me a couple of rides to get the triple adjusted spot-on. Following Shimano's install directions to the letter seemed to help get things pretty close, but I believe I had to play with the cable tension a bit to get things shifting perfectly.
Beth
#16
Bike Junkie
Join Date: Jun 2005
Location: South of Raleigh, North of New Hill, East of Harris Lake, NC
Posts: 9,622
Bikes: Specialized Tarmac, Specialized Roubaix, Giant OCR-C, Specialized Stumpjumper FSR, Stumpjumper Comp, 88 & 92Nishiki Ariel, 87 Centurion Ironman, 92 Paramount, 84 Nishiki Medalist
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 68 Post(s)
Likes: 0
Liked 37 Times
in
27 Posts
On the bikes I own and bikes I've flipped that have triples, the chain suck problem is usually the derailer limit screw needs adjustment or the cable needed adjustment.
However, the OP said shifting was sluggish, and when it shifted, it would fall off. Before I start messing with that bikes limit screw, my experience says check the chain for stretch. I had that a happen on an older road bike with triple. When I checked the chain, sure enough it was time for a replacement. Once changed to a new chain, the problem disappeared. I think the OP ought to check his chain for stretch based on it being two problems.
I ran into one bike where nothing worked, my main hardtail MTB. Finally I changed the less than one year old Alivio derailer for an LX. Chain suck problem solved. I think its interesting that on the Giant OCR-C3 triple, all the components are 105 except the front dr, its' an Ultegra. On my personal bikes that have a triple, I like to put an upgraded dr on the front if I have any problems.
However, the OP said shifting was sluggish, and when it shifted, it would fall off. Before I start messing with that bikes limit screw, my experience says check the chain for stretch. I had that a happen on an older road bike with triple. When I checked the chain, sure enough it was time for a replacement. Once changed to a new chain, the problem disappeared. I think the OP ought to check his chain for stretch based on it being two problems.
I ran into one bike where nothing worked, my main hardtail MTB. Finally I changed the less than one year old Alivio derailer for an LX. Chain suck problem solved. I think its interesting that on the Giant OCR-C3 triple, all the components are 105 except the front dr, its' an Ultegra. On my personal bikes that have a triple, I like to put an upgraded dr on the front if I have any problems.
__________________
Roccobike BF Official Thread Terminator
Roccobike BF Official Thread Terminator
#17
Senior Member
Join Date: Dec 2006
Location: Washington, DC
Posts: 1,505
Bikes: 2006 Specialized Roubaix Comp
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I appreciate that. As I said earlier, I'm thinking about rebuilding (or having rebuilt by a trusted mechanic) the drivetrain on one of my bikes. Having full Ultegra on my compact and never having a problem with it, I haven't been sure if it's the 105 that's the problem, or the fact that it's a triple.
Beth
Beth
#18
Senior Member
Join Date: Apr 2003
Location: Pasadena, CA
Posts: 3,162
Bikes: Litespeed Firenze / GT Avalanche
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
If your trusted mechanic can't adjust a triple, you shouldn't trust your mechanic.
Seriously, they take a FEW more minutes to get tweaked in. But getting the limit screws set is no different.
Seriously, they take a FEW more minutes to get tweaked in. But getting the limit screws set is no different.
#19
Senior Member
I appreciate that. As I said earlier, I'm thinking about rebuilding (or having rebuilt by a trusted mechanic) the drivetrain on one of my bikes. Having full Ultegra on my compact and never having a problem with it, I haven't been sure if it's the 105 that's the problem, or the fact that it's a triple.
I would think that a 105 triple should work nearly as well as an Ultegra, but have to admit that I haven't actually ridden one. I would expect that shifts with a triple probably wouldn't be as fast as with a compact, but you shouldn't be dropping the chain or having difficulty getting it onto the chain ring you want...
#20
Neophyte
Join Date: Aug 2008
Location: Toronto, ON.
Posts: 111
Bikes: 2001 Devinci Caribou (touring bike)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
my chain also keeps poping off. i have a double and i tend to ride the big ring, at a stop light i'll shift the lowest gear, yes cross chaining, and then i'll start and the chain will just pop off into the bottom bracket. i've adjusted the chain tension, but that didn't seem to help, acutaly i get chain rub if i losen it anymore. its just scary when a red light turns green, you get up to go and the chain pops off.
any help?
any help?
Well, the chain was very worn, and it had taken the rear cassette with it (I bought the bike used, and put 1000 km on it myself) so I put on a new chain and a new cassette... problem solved.
Look closely at your chain -- does it have play side-to-side? Can you see the gaps between the rings and links? Perhaps a new chain is all you need....
#21
Senior Member
Thread Starter
Join Date: Jun 2008
Location: Indiana
Posts: 514
Bikes: 2015 Scott Solace 30, 2007 CAAD9 Optimo 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
My chain is actually almost new as the last time my old chain went to pop off, it exploded.