Set the lower limit adjustment

Q: My front derailleur never works right. It has always been it will not downshift when it dropped chain. How do I solve this problem? From: Joe
Almost everyone struggles with the front derailleur, including many professional mechanics. However, they are actually very easy to set up. There is a front derailleur adjustment only four parameters: position, upper and lower limits, the cable tension. The secret is to build them right in the correct order.
First, the location of the front derailleur outer cage plate, so 1 - 3MM between the above is the largest chainring (I prefer to stay close to the bottom of the adjustment range) maximum teeth. Ensure that the outer cage is parallel to the outer ring.
Next, set the lower limit adjustment (screw, is labeled "L"). The largest coke oven gas and the smallest sprocket chain. Introduction of anchor, so that the cable hanging. If you have a road bike, adjust the limit, the transmission is close to the cage without touching the inside of the chain as possible. This will prevent the fall inside the small sprocket chain. If you have a mountain bike, adjusted so that the positioning of the chain between the way the inner cage plate and the outer cage plate of the third. If you feel confused, should chain plates than outside.
Now set the cable tension. This will adjust the transmission over the future changes. Anchor anchor the cable tight. Perform some test changes. You want to shift the front derailleur to the next tooth plate and inner plate eventually become possible, and as close to the chain back to the largest coke oven gas. This will ensure you have adequate clearance between the chain and the transmission plate, when you are at the other end of the cassette.
What remains is to adjust the high limit (labeled "H" screw). As the chain transfer to the COG to ensure minimal outside the front derailleur plate, and the gap between the gear chain is 1 - 2mm. Do a lot of testing changes to ensure that you do not throw chain outside. If you do, then tighten the screws outside the limit, until it will not happen.
You are done! This is not so bad? There are many, many products on the market these days, aid the front derailleur set up. One of the most popular is the K - side chain catcher. Install one of them, you can adjust a bit to make downshifts a little easier your inner limit screw. You do not have to worry about down to take advantage of these changes to improve performance is with them, not only as a decline in the insurance chain, one of the chain.