lyle.coop

My chain rubs on the front derailleur plate when i'm in the large ring upfront. Happens when I'm in the small cog in the back or somewhere in the middle of the cog stack.

How can I fix this?

Also, I just want to confirm that the limit screw closer to the frame is the small ring limit screw.

Bike is a 2005 Specialized allez comp double.

-Cassette10-speed, 11 - 23 teeth
CranksetFSA G-2, 39/53 teeth
Component GroupShimano Dura-Ace

stevel610 

YouTube "front derailleur adjustment." You'll have to move the little screws shown on the top of the derailleur in the one of the pictures.

genejockey 

Unscrew the 'high' limit screw with the FD in the big ring and the RD on the smallest cog till it clears. Then you may need to add tension to the cable so that it swings that far when you shift.

If you can't figure it out any other way, drop the FD to the small ring and work the little lever on the STI to make sure that it's as low as it goes. The cable should have just a little slack. While watching the FD cage, unscrew half a turn, and see if the cage moves toward the frame. If yes, adjust it. If not, turn it back to where it was and try the other one. I'm pretty sure, based on how these things work, that you're correct about which screw is which.

datlas 

Trim is your friend.

edit: maybe not unless you already pushed the FD lever a smidge to the inside. If not, then you do need to adjust limit screw

cyclezen

You might also check the FD cage alignment. From the images it appears off a bit.
that, for sure, can be cause of rubbibg.
thx Yuri

curbtender

Before you screw with the screw limits, pull on the cable and see if it moves further out. You may just need a cable adjustment.

shelbyfv

Not that it matters but it's an Ultegra derailleur, not DA. Your H limit screw is all the way in so good chance that is the problem. Loosen it a turn and see if that resolves it. If not, start over from scratch with FD height, alignment, etc. Follow the instructions in order.

lyle.coop

The FD cage was slightly twisted. I twisted it just a hair - that solved 75% of the rub. The rest was just loosening the limit scew. Thanks guys!!

WhyFi

Man, I hope that chain is black by design.

lyle.coop

Yeah it's weird. I cleaned the bike maybe 150 miles ago and it picked up all this dirt. I cleaned it with simply green and got everything back to silver. Maybe it's the lube I'm using on my chain.

fujidon

If it picked up that much dirt in just 150 miles, then yes, it could be your choice of lube, but I think it's more likely that it's a case of too much lube.

I lube my chains the day before a ride or just after a ride with the smallest amount that I think will do the job. I choose to lube my chain well before using on the theory (possibly wrong) that the lube will have time to seep into the rollers better and let to allow any evaporative solvents to, uh... evaporate.

I also thoroughly wipe off the chain after lubing because there's no need for any lube on the exterior surfaces.

Sy Reene

Great segue to a new topic! Please tell us what chain lube we evidently should be avoiding.

lyle.coop

Tri-Flow Superior Lubricant Drip Bottle

lyle.coop

I dont put a ton on. I just run the chain and slowly drip some on. Then shift thru the cogs. After that I wipe off the chain.

cxwrench

You're doing it wrong. Do NOT shift until you've wiped the excess off. You don't want lube on the cogs. It's called 'chain lube' for a reason.

shelbyfv

You may have to wipe after each ride for awhile until the excess is gone. I usually wipe the chain either before or after each ride (What Did You Do To Your Bike Today) but that could be wrong for some reason.