Road Bike, Cycling Forums banner
1 - 12 of 12 Posts

·
Registered
Joined
·
269 Posts
Discussion Starter · #1 ·
Hi, my friends Shimano 105 (5800) compact set up feels like the chain wants to jam while shifting to the big ring, the FD is braze on. I can complete the shift by hand but it is not smooth. The FD seems seated properly with a slight touch of tail angle in the back. The FD will shift back to small ring no problem. Thanks
 

·
Registered
Joined
·
2,580 Posts
The obvious things to check are the height and alignment. Check out YouTube for some how-to videos.

Otherwise you haven't given us much to work with here

Sent from my Pixel using Tapatalk
 

·
'brifter' is f'ing stupid
Joined
·
15,567 Posts
Support screw adjusted properly? Outside derailleur cage needs to be parallel to the big ring, not angled at all. Height should be 2-3 mm over the teeth.

Is this happening in the work stand or on the road?
 

·
Forever a Student
Joined
·
4,963 Posts
After setting the cage parallel, as stated above, and being sure the support bolt is at least touching, and getting the height right...

Shift into the big ring and the biggest cog in the back, cross chain style (the pro's gear).

Click down to the trim position for the big ring, but keep it in the big ring.

Adjust tension on the barrel adjuster, which you have to have installed inline by the way, until the inner of the plate just barely has a gap, maybe half a millimeter or so. Same sort of way you set the low limit.

Oh, and of course make sure your limits are set right before any of this cable adjustment stuff.
 

·
Registered
Joined
·
269 Posts
Discussion Starter · #6 ·
The FD was in its proper positioning (for this particular FD Shimano has the tail end 1-1.5mm toward the frame. I decided to adjust it so that it was parallel just so see if there was any difference and the change was quite noticeable.
 

·
'brifter' is f'ing stupid
Joined
·
15,567 Posts
The FD was in its proper positioning (for this particular FD Shimano has the tail end 1-1.5mm toward the frame. I decided to adjust it so that it was parallel just so see if there was any difference and the change was quite noticeable.
You've failed at reading the instructions. Try again.

"1. After tentatively tightening the clamp bolt, adjust the low adjustment screw and align the front end of the outer plate of the chain guide parallel to the surface of the largest chainring.
At this point, adjust the chain guide so that its rear end is 0.5 – 1.0 mm inside."

Followed by height adjustment instructions, then this:

"4. Adjust the support bolt so that the flat portion of the outer plate of the chain guide is parallel to the surface of the largest chainring.
* Check by holding an Allen key against the flat surface of the largest chainring."
 

·
Registered
Joined
·
269 Posts
Discussion Starter · #9 ·
Thank you everyone, it was an off angle FD and has been corrected!

"You've failed at reading the instructions. Try again. "

To be honest I didn't like the tone of this comment. No one is making you reply. I wrench for friends and the like, mostly to help them get of of mechanical jams and any money I earn I put into my charity ride fundraising kitty. Thus I avoid having to hit people up for money and I give my time and my bicycle mechanical knowledge in return. I am a pretty good wrench and if I have a question this forum is the first place I turn. There is enough obnoxiousness in the world, let's not add to it.
 

·
'brifter' is f'ing stupid
Joined
·
15,567 Posts
I've been refining my act here for over a decade. It's been honed to near perfection...just the right amount of obnoxiousness tempered w/ sometimes valuable information. If that really bothers you then maybe the interwebs are the wrong place to look for help like this. You never know when some guy like me will show up and be mean. Sorry if I offended.
 

·
Registered
Joined
·
14,713 Posts
I've been refining my act here for over a decade. It's been honed to near perfection...just the right amount of obnoxiousness tempered w/ sometimes valuable information. If that really bothers you then maybe the interwebs are the wrong place to look for help like this. You never know when some guy like me will show up and be mean. Sorry if I offended.
Yeah, that's about right. It can be a mistake to be too sensitive in a place like this. When I find myself the target of one of your bluntly-phrased corrections, I usually try to get rid of my hurt feelings by replying, "Oops; you're right; thanks."

Because, like, you're usually right, so I learned something. Though once or twice I've caught you in a mistake, which gives me a wholly unreasonable amount of satisfaction.

FreeRojo, I'm glad you got things straightened out.
 

·
Banned Sock Puppet
Joined
·
14,452 Posts
To be honest I didn't like the tone of this comment. No one is making you reply. There is enough obnoxiousness in the world, let's not add to it.
CX can be grumpy at times. Just give him a back rub and some treats and he'll purr like a kitten.
 
1 - 12 of 12 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top