50. How To Install a Front Derailleur
Removal and installation of a standard clamp-on front derailleur.
Today we'll learn how to replace a standard band-type clamp-on front derailleur. We'll cover the E-Type bottom bracket mounted derailleurs in a future tutorial.
For this job you'll need a 5mm hex key for the derailleur's mounting bolt, and a phillips(+) screwdriver to adjust the derailleur's limit screws and remove the derailleur cage bolt. If you are removing the chain you may need a chain tool depending on your type of chain. You’ll also need wire cutters and either a 9 or 10mm metric open end wrench or a 5 or 6mm hex key to remove and install the front shift cable.
The first step is to shift your chain onto the smallest front chainring. Then pull off the shift cable's end cap and loosen the cable pinch bolt. Remove the cable from the derailleur.
Now you'll need to remove the chain from the derailleur. Some chains have a special connector pin that need replacing if removed, so if you don't need to remove the chain for cleaning or replacement you can simply undo the derailleur cage's tail screw and flex the cage open to release the chain. Rest the chain on the bottom bracket shell to keep it out of the way.
If you are removing the chain, disconnect a link and pull the chain through the derailleur cage. Now you can undo the derailleur's mounting bolt all the way counter clockwise to remove the derailleur from the frame.
Before installing the new front derailleur, apply some waterproof grease to the mounting bolt. Then place the clamp around the frame and tighten the mounting bolt just enough to keep it in place. At this point you still need to be able to move it by hand.
Now adjust the derailleur's height and angle. For height adjustment, the bottom edge of the outside derailleur cage should sit approximately 2mm above the top of the teeth on the largest chainring. For the angle adjustment, rotate the derailleur until the cage is parallel with your chainrings. Then fully tighten the clamp's mounting bolt.
If your chain is still on the bike, undo the tail screw on the derailleur cage and flex the cage to pull the chain through. Then re-install and tighten the tail screw again. If you have removed the chain, re-route the chain through the derailleur cage and reconnect it. Search the site for tutorials on how to use a chain tool or a quick release chain link.
Now preset the low-limit (L) screw so the small chainring appears halfway between the derailleur cage when viewed from above.
Thread the shift cable back into the derailleur, pull it tight and tighten the anchor bolt so the cable flattens. Then find a bare stretch of cable and give it a good pull to make sure the cable is seated and has no slack. Then loosen the cable, pull it tight again and re-tighten it.
Now you're ready to adjust the front derailleur as shown in previous tutorials. If necessary, trim the cable so there is about 2 inches remaining. Then slide on a cable end cap and crimp it in place.
I wonder if anyone can help with an issue I'm having with my rear derailleur.
I'm not really sure how to describe this but you can see here http://tinypic.com/r/2cwogbb/8 (direct images not working...). Basically when changing gears, the mech (which has recently been professionally fitted) locked up in the stretched out position and now I can't get it back. It has happened a few times before and released itself, but no joy this time.
Sorry if this is discussed el... Read more >>
I bought a very old Mongoose mtn bike from Goodwill for commuting to/from the metro station, and would like to replace its very old Suntour 3000 alpha rear derailleur. Is there a model of derailleur I'm likely to find that will allow me to keep the index shifting? Or should I give up and buy any old other derailleur for continuous shifting?
Thanks!... Read more >>
My bicycle had been shifting erratically on its own. I downshifted and immediately after downshifting a loud CLUNK jammed my tire. This is what the damage looks like---is this ... Read more >>
i bought a raleigh mtrax ht 1.0 but the hanger from the Rear Derailleur is missing ive been in a few bike shops and they are unsure what hanger i need. i've been online and there are hundreds of different shapes and don't want to start wasting money on hangers and they don't fit so if anyone knows the type of hanger i need would be very helpful
here is a stock pic of the bike
I have found what one... Read more >>
i have Hunter Shadow from years ago, probably the 80's, not a high end bike from Hunters in California.
it has 1.25" tubing. i sent it to a bike shop a year ago because I couldn't remedy it and they did a home made type of repair. the bike would never shift into low. same after they repaired it. no difference. the derailleur is the wrong one as it had no cable stop to attached the sheath or jagwire that fed up from the bottom cable stop.. now to the chase. i removed the front derailleur and the small and large chain rings and now have a 36 tooth middle chain ring left on the same crank... Read more >>
Hey guys, I'm a total novice when it comes to working on bicycles and I read through a lot of posts and I watched some youtube videos but I am really confused on how to get my derailleur back on. I was trying to get my back tire off to change the tube and some how the derailleur inadvertently "fell off". Also, a small metal piece fell off with(I did not see any screws land anywhere), which I have no idea where it goes or what it is for.
I don't know hardly any of the biking terminology so it has made it even more difficult for me to understand what I need to do to get it back... Read more >>
My new 10 speed Shimano 105 block came with a skinny aluminum spacer, which was intended to fit behind the block. Does this always need to be fitted or is it for special circumstances? I also have new 10 speed specific wheels and the chain does clear the spokes without the spacer. The new chain is not smooth under pressure, could taking out the spacer be a solution? Thanks.... Read more >>
Dear friends, I wanna buy a bike that will provide me both road and trail usage. and it should be also economical. There are lots of level of quality between shimano accessories such as Tiagra, Xtr.. and also same thing for Sram. Could you advice me the correct hierarchy between models acc to price. And advice a bike for both road and trail usage.Thanks in advance.. http://bikebest.net/versus/... Read more >>
The metal cap at the end of my derailleur cable somehow came loose so now the cable end has unravelled into multiple strands. They are a cut hazard and look ugly. Appreciate any suggestions on how to fix.... Read more >>
It's presently 0 Degrees F, with a -16 wind chill in Chicagoland...
It's been ~3 months since the overhaul of the 2 bikes, and I've been alternating them from the repair stand (Bunji Straps hanging from ceiling joist in basement)..
When I started I figured a squirt of oil was all that was needed. I had no idea what nice bikes I had!
I learned about strange part sizes from Here & Internet.
I learned about parts & "Alternate Parts" procurement from LBS, Here, & Internet.
I learned about loose bearings from the first dis-assembly.. and found b... Read more >>
I have two Deore LX derailleurs... one is a RD550 and the other is a RD565.
Which one is a better derailleur or is there a better one?? Any differences between the two other than the model number?? Both have the SGS long cage.
Trying to figure out the Shimano numbers and quality grades.
Thanks... Read more >>
I have a Boarman Hybrid Pro (2010 Model - White http://road.cc/content/review/4160-boardman-urban-pro-ltd) and the I have had a lot of repairs on it recently.
After the latest repair I noticed the chain was wobbling from left to right more than what I expected. I bought it back to the bike shop but they gave me lip service on the cause and the repair for the problem.
With further inspecition I noticed that that both rear derailleur pulleys are wobbling and are l... Read more >>
Hi, I need to replace and old broken RD-TZ30 drlr 7 speed.
Does anyone know if the Shimano Acera M360 7-8 Speed would be an ok replacement?
It is for an old (but much loved) Schwinn Jaguar beach cruiser.
Thanks!... Read more >>
I took off my rear derailleur to clean my bike and i need help putting it back on. Its a shimano derailleur with the hook. And i have a diamondback mountian bike. If anyone can help it would be appreciated!! I dont remember exactly how it was attached to the frame
Jay... Read more >>