Go Back  Bike Forums > Bike Forums > Road Cycling
Reload this Page >

SRAM Etap Front Derailleur Chain Drop

Notices
Road Cycling ďIt is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.Ē -- Ernest Hemingway

SRAM Etap Front Derailleur Chain Drop

Old 10-10-21, 08:09 AM
  #1  
Amelio 
Letís discuss bikes
Thread Starter
 
Join Date: Jun 2021
Location: Toronto
Posts: 93

Bikes: Apollo something, 1983 Bianchi Super, Specialized Road

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
Liked 22 Times in 14 Posts
🦃Happy Thanksgiving 🦃 SRAM Etap Front Derailleur Chain Drop

Good morning everyone, happy Thanksgiving 🦃 to those celebrating!

I just started getting some chain drop on my sram front derailleur, surprise surprise! The chain is falling off the small ring. I was winding down from a nice 23km ride on the small side street and it also shifted down to the small rain and I topped the rear derailleur to go up another couple rings chain fell off. A passerby had a huge grin on her face watching me put my chain back on, A bit embarrassing but whatever hahaha. Not as embarrassing as slowing down and getting my tire caught in a tar-filled rut beside curb, popping up out and up onto the sidewalk not being able to get my foot out of the pedals and crashing into a bush which kept me totally upright! That was the luckiest minicrash of my life! Felt like such a stupid boneheaded move. I just canít think quickly enough to twist my feet and pull them up and out of the pedal clips. 😐

anyway!

I tried adjusting the lower limit screw which is the bottom screw and while testing, hanging vertically from the front wheel, the chain keep falling off but perhaps itís the position of the bicycle? The mechanism is definitely not designed to operate vertically, if the gene requires gravity is pulling in the wrong direction.

I need to get out and give it a test ride.

any ideas folks? Am I in the right group? Is there a group for shifting sram front shifting issues?

p.s. someone told me SRAM canít make a proper shifting front derailleur which is why they push 1x.


Last edited by Amelio; 10-10-21 at 09:23 AM.
Amelio is offline  
Old 10-10-21, 10:38 AM
  #2  
datlas 
Beyond Bogus
 
datlas's Avatar
 
Join Date: Dec 2007
Location: Malvern, PA (20 miles West of Philly)
Posts: 36,357

Bikes: 1986 Alpine (steel road bike), 2009 Ti Habenero, 2013 Specialized Roubaix

Mentioned: 508 Post(s)
Tagged: 2 Thread(s)
Quoted: 16176 Post(s)
Liked 3,900 Times in 1,934 Posts
I await input from SRAM experts, but consider a chain catcher? I use one on my bikes to prevent that rare but frustrating chain drop. The K-edge style works better than the dog-fang style fwiw.
__________________
Originally Posted by rjones28 View Post
Addiction is all about class.
datlas is offline  
Likes For datlas:
Old 10-10-21, 11:48 AM
  #3  
DaveSSS 
Senior Member
 
Join Date: Sep 2008
Location: Loveland, CO
Posts: 6,568

Bikes: TWO Cinelli superstar disc with SRAM Force AXS

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 747 Post(s)
Liked 352 Times in 285 Posts
Sram etap axs 12 speed is what I have and is different than etap 11, but I see the same type of alignment marks on the FD cage. 12 speed has a height window stamped inside the cage that's used to set the height to the tallest teeth on the big ring. The chain really needs to be off to setup the FD. A common problem is alignment the marks on the cage with the clamp bolt lightly tightened, then failing to notice that the FD has rotated slightly out of alignment when the clamp bolt is fully tightened. I have to set mine slightly crooked to start with so it ends up with the marks parallel to the big ring after tightening. I also take an accurate gap measurement between the derailleur cage and crankarm, before and after tightening.

I've setup my two bikes 8 times with 6 cranks and never had a chain drop. I first used Campy chorus 12 cranks, then shimano grx 46/30 and now grx 48/31.

Last edited by DaveSSS; 10-11-21 at 07:05 AM.
DaveSSS is offline  
Likes For DaveSSS:
Old 10-10-21, 06:43 PM
  #4  
Amelio 
Letís discuss bikes
Thread Starter
 
Join Date: Jun 2021
Location: Toronto
Posts: 93

Bikes: Apollo something, 1983 Bianchi Super, Specialized Road

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
Liked 22 Times in 14 Posts
thanks for all the great info Dave, really appreciate it. Mine is also SRAM

12 speed and I saw the side to side marks but didnít realize there were height marks as well. The yaw marks donít actually line up with the big ring, at least the back of the derailleur is a little off, Iíll have to fix that.

After my adjusting of lower limit screw last night, I took it out for a spin today with lots gear changes and couldnít get it to drop chain, it seems pretty solid, but Iíd like to adjust the FD height and yaw.

The groups you mentioned at the bottom are mostly Shimano and my experience with Shimanoís been great with no drops at all. I really hope this SRAM setup can tweaked to be similar.

Originally Posted by DaveSSS View Post
Sram etap axs 12 speed is what I have and is different than etap 11, but I see the same type of alignment marks on the FD cage. 12 speed has a height window stamped inside the cage that's used to set the height to the tallest teeth on the big ring. The chain really needs to be off to setup the FD. A common problem is alignment the marks on the cage with the clamp bolt lightly tightened, then faling to notice that the FD has rotated slightly out of alignment when the clamp bolt is fully tightened. I have to set mine slightly crooked to start with so it ends up with the marks parallel to the big ring after tightening. I also take an accurate gap measurement between the derailleur cage and crankarm, before and after tightening.

I've setup my two bikes 8 times with 6 cranks and never had a chain drop. I first used Campy chorus 12 cranks, then shimano grx 46/30 and now grx 48/31.

Last edited by Amelio; 10-10-21 at 07:04 PM.
Amelio is offline  
Old 10-10-21, 09:24 PM
  #5  
chaadster
Thread Killer
 
Join Date: Aug 2008
Location: Ann Arbor, MI
Posts: 10,860

Bikes: '15 Kinesis Racelight 4S, '76 Motebecane Gran Jubilťe, '17 Dedacciai Gladiatore2, '12 Breezer Venturi, '09 Dahon Mariner, '12 Mercier Nano, '95 DeKerf Team SL, '19 Tern Rally, Ď21 Breezer Doppler Cafe+, Ď19 T Lab X3

Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 1758 Post(s)
Liked 796 Times in 495 Posts
I have no drop problems with Force AXS FD, but it does require proper setup to function properly. Shocker, right? SRAM have setup instruction vids on YouTube, and my FD came with a tool for proper cage height placement.
chaadster is offline  
Likes For chaadster:
Old 10-11-21, 07:08 AM
  #6  
DaveSSS 
Senior Member
 
Join Date: Sep 2008
Location: Loveland, CO
Posts: 6,568

Bikes: TWO Cinelli superstar disc with SRAM Force AXS

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 747 Post(s)
Liked 352 Times in 285 Posts
One thing I should add is that the marks on the cage must be parallel to the big ring, but they won't be located directly over the big ring. It's the parallelism that's critical. I'm not fond of SRAM's limited 13T difference at the crank, so I use other cranks to get more range.
DaveSSS is offline  
Likes For DaveSSS:
Old 10-11-21, 07:28 AM
  #7  
Amelio 
Letís discuss bikes
Thread Starter
 
Join Date: Jun 2021
Location: Toronto
Posts: 93

Bikes: Apollo something, 1983 Bianchi Super, Specialized Road

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
Liked 22 Times in 14 Posts
Oh thatís really interesting, you are so we passed me in an experience, thanks very much!

Youíre using other cranks and it still shifts just fine? Thatís great!

I bought the front derailleur alignment tool today, should make things a bit easier:





Originally Posted by DaveSSS View Post
One thing I should add is that the marks on the cage must be parallel to the big ring, but they won't be located directly over the big ring. It's the parallelism that's critical. I'm not fond of SRAM's limited 13T difference at the crank, so I use other cranks to get more range.
Amelio is offline  
Old 10-11-21, 07:30 AM
  #8  
Amelio 
Letís discuss bikes
Thread Starter
 
Join Date: Jun 2021
Location: Toronto
Posts: 93

Bikes: Apollo something, 1983 Bianchi Super, Specialized Road

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
Liked 22 Times in 14 Posts
But itís electronic, it should just do it all itself! 😂

thanks Chaadster I purchased that tool today.

Originally Posted by chaadster View Post
I have no drop problems with Force AXS FD, but it does require proper setup to function properly. Shocker, right? SRAM have setup instruction vids on YouTube, and my FD came with a tool for proper cage height placement.
Amelio is offline  
Old 10-11-21, 07:51 AM
  #9  
DaveSSS 
Senior Member
 
Join Date: Sep 2008
Location: Loveland, CO
Posts: 6,568

Bikes: TWO Cinelli superstar disc with SRAM Force AXS

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 747 Post(s)
Liked 352 Times in 285 Posts
I've never used the sram tool. Even with it, you should do an eyeball check for parallelism after tightening the clamp bolt. The tool won't stop the FD from rotating when the clamp bolt is tightened. I have to deliberately set the cage a little crooked, so it ends up parallel when tightly in place.
DaveSSS is offline  
Likes For DaveSSS:
Old 11-09-21, 05:48 PM
  #10  
flx100
Member
 
Join Date: Sep 2018
Posts: 48
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 20 Post(s)
Liked 9 Times in 6 Posts
Originally Posted by DaveSSS View Post
I've never used the sram tool. Even with it, you should do an eyeball check for parallelism after tightening the clamp bolt. The tool won't stop the FD from rotating when the clamp bolt is tightened. I have to deliberately set the cage a little crooked, so it ends up parallel when tightly in place.
I just want to confirm this - i have the same experience. This parallel alignment is super important for proper front shifts, and yes, check again after tightening as it will have moved.
I also have the derallieur as low as it can possibly go without touching the chainrings.
In my experience these two things need to be adjusted very accurately, and the limits also need to be spot on. Not easy to get right.
flx100 is offline  
Old 11-14-21, 11:18 AM
  #11  
JohnJ80
Senior Member
 
Join Date: Feb 2011
Location: Minnesota
Posts: 4,475

Bikes: N+1=5

Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 783 Post(s)
Liked 159 Times in 119 Posts
You should be good with the alignment tool but I'd also install a chain catcher at the same time (as long as you are fiddling with the FD position). The parallel alignment is exceptionally critical on eTap (at least it was on my 11 speed eTap). I just spent some time putting on an oval chain ring where it is even more critical, and it takes some patience and fiddling time. That said, both parallel and the height above the chainring matter and the SRAM ones have been touchier IMO than the Shimano ones.

J.
JohnJ80 is offline  

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.