Originally Posted by
martslc
Component Group Shimano 105 Brake set Cannondale C2 brakes, Shimano 105 levers
Shift Levers Shimano 105
Front Derailleur Shimano 105
Rear Derailleur Shimano 105
Crankset Shimano 105 Compact, 34/50 teeth
Bottom Bracket Shimano 105
Rear Cogs10-speed, 12 - 25 teeth
Chain: Shimano (Current chain): Ultegra CN-6701 Bike Chain 10 Speed
Anything else I need to supply information wise??
Suggested possibilities from you guys:
1. Bent tooth and or burrs on the teeth. - Straighten and or file teeth
2. Worn chainring – Replace
3. Front derailleur out of adjustment. Not sure thing would cause chain suck but I supplied a pic of at least a picture of the derailleur. (Straight on shot). Side picture showing alignment vertically was impossible for me to get.
4. Loose, spider and the arms bolts.
So after zooming in on the teeth what your thoughts, bad or ok?? I know that’s hard to say but maybe pictures help a little.
Thanks a bunch guys!
Your chainrings aren't worn. The front derailer can't cause "chain suck". Your problem is likely due to a burr which we can't see in your picture. Burrs can happen on the first ride or the second or the 100th or... Most of the time they are caused by a bad shift. If you've ever shifted and your chain clatters rather then lifts up on the ring, that's when a burr can form. Just the action of the chain moving from on ring to another on a upshift can cause the problem.
As the chain lifts up onto or off of the rings, it can gouge an aluminum ring and leave a small raised bit of metal. Since 10 speed chains are very narrow, there isn't a lot of room and even a very small burr could cause the chain to stick on a tooth. Shift the chain off the ring and inspect each tooth for any kind of scrape marks or raised bit of aluminum. You may have to look very closely as the burr can be small.