Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: Will this product fit a 28.6mm downtube?
Document: That is WHY I buy the low priced Shimano parts..Cheap does not  mean this will not work..Use the shims to fit your bike. IF your down tube is ROUND more than likely this will work for you..Some down tubes, on some bikes are not totally round so if you don't have a round down tube to mount this on check with someone in the know.
these products are from one of the leaders in bicycle products,quite possibly the leader,but their components are topflight high quality,long lasting gear,you wont be disappointed!!!!! !
This is a cheap bike part but I am not rating it on quality as much as on what it does for the money.. You can buy a MUCH better part for a LOT more money but the good news is this one works just fine and was not expensive. Most people DO NOT change gears properly in the first place.
This derailleur is cheap, but it is well made. I replaced my wife's front derailleur that came on her walmart roadmaster, and with a few adjustments, the front cogs now shift smoothly. I actually bought a second one to put on a bike I recently built,
The price was cheap so I purchased this Tourney FD as a spare FD for my parts bin. I normally use Acera and higher MTB components for my MTBs and touring bikes but will use this FD as an emergency fill in should I need a spare FD.
Recently I bought a cross bike fitted with Shimano Tourney system. Due to improper shifting - riding on oposite gears and shifting when accelerating I lost first gear on chain ring. It was only that I had to adjust lower limit of front derailleur. That was easy. That's all. Very satisfied the part sustained improper shifting. No replacement.
I went to an LBS and had them adjust it after I installed it to the bike frame. I'm new to riding so I have no clue on adjusting it. It shifts just fine for me.
Good luck, Chief.
Bought this to replace C101 front deraillleur on Trek hybrid. Existing one had severe corrosion issue with the alloy frame. This one I installed with a shim made from a drink can and so far all is well. Shifts very well but I use friction thumb shifter instead of indexed for front derailleur.
Answer: no