Is this front derailer snapped and/or bent?

Asked by: Danny Branch

Why is my front derailleur bent?

A bent cage can result from a crash or getting the chain jammed at the ring and being forced open by pedaling. Re-bending a cage is difficult. You often end up with multiple bends because it is difficult to isolate the first bend when attempting a fix. Replacement is really the best option.
Jul 29, 2017

How do you test a front derailleur?

To check the position of your front derailleur, shift it so that the derailleur arm is positioned over the outermost chainring. The derailleur “cage” (the long, curved section of the derailleur that the chain passes through) should be approximately 2mm above the teeth of the chainring (when viewed from the side).

How do you fix a front derailleur that won’t shift?

Pull the cable as tight as feasible with your fingers and retighten the anchor bolt. Try to shift up to the larger chainring. If the chain won’t shift or feels sluggish, twist the inline barrel adjuster further up the cable (turn it anti-clockwise) to increase the tension and try again.

Can I remove front derailleur without breaking chain?

If the derailleur is riveted closed, you won’t be able to take it off the bike without breaking the chain or destroying the derailleur. If you’re going to replace it, then you’ll need to break the chain anyway to put the new derailleur on. So if that’s the case, then just buy a chain tool and new derailleur.
Aug 18, 2015

How can I tell if my derailleur is bent?

Quote from video: The key is to look at the rear derailleur we can see it's bent slightly inward. And also look at the guide pulley which doesn't seem to line up with the chain or cog above.

How do you fix a bent derailleur?

Quote from video: It's not always so obvious when it's straight but what you can do. If you really had to is pop an adjustable spanner onto. The hanger like that and from the back of the bike.

How tight should front derailleur cable be?

1. Before you get too worked up about cable tension it’s vital to know that your front derailleur is positioned accurately. The gap between the lower edge of the front derailleur cage and the top of the outer chainring teeth should be 1-3mm for optimal performance.
May 29, 2020

What’s a braze on front derailleur?

The braze-on front derailleur has a small nub and an internal thread to accept a mounting bolt. If a bike has a braze-on front derailleur, it means that there is a bracket on the bike frame to bolt the bike’s front derailleur rather than having a clamp around the bike’s seat tube.

Should you adjust the front or rear derailleur first?

In a nutshell, adjust the front derailleur first, then the rear. Show activity on this post. If the derailers just need minor tweaking (they are basically in adjustment but are “not quite right”) then you adjust the one that is obviously wrong, check the overall adjustment again, then again adjust what needs adjusting.
Jun 9, 2016

Why are my bike gears not shifting?

This is usually caused by an overly tight gear cable or the low limiting screw that needs adjusting. You can test this by shifting to the lowest gear and seeing if your front derailleur is in line with the smallest chainring. If not, try adjusting the limiting screw. Alternatively, your gear cable may be too tight.
Dec 14, 2020

What happens if front derailleur is too high?

Derailleur Alignment & Positioning



Most front derailleurs can be adjusted for height and rotation. If the cage is set too high over the largest ring, it may not perform well. Too high a cage can cause a slow shift, and can allow the chain to shift over the largest ring.
Jul 29, 2017

How do you fix a stuck bike gear?

Quote from video: I'm gonna renew brigate with a little bit of white lightening or chain lube or any of that other stuff that you got into.

Is my derailleur or hanger bent?

Sometimes, you can visually confirm that a derailleur hanger is bent by looking at your bike from behind. If a hanger is straight, the rear derailleur pulleys and cage will be vertically aligned with the cassette cogs. Even if a hanger isn’t visibly bent, it might still need straightening to ensure good shifting.
Feb 23, 2022

How much does it cost to fix a bent derailleur?

There can be a range of prices for replacement derailleurs, starting around $20 and going all the way up to $700.

What causes derailleur to bend?

A common cause of a misaligned hanger is from the bike falling over to the right side. This pushes the derailleur body inward, bending the hanger. It is often possible to repeatedly re-bend many derailleur hangers. This is because there is very little stress from riding the bike or shifting gears.
Aug 30, 2015

How do you fix a bent front derailleur cage?

Quote from video: And so basically this just screws right into the derailleur hair like this and then so I'll screw that in it's fine we'll go there and I can use this to go ahead and one bend the thing and.

How do you bend a front derailleur cage?

Quote from video: So if you don't have any the correct tool to do it you can use a crescent wrench. And I will put the crescent wrench right there in the very bottom as high up as you can get on this jockey pulley set.

How do you adjust a front derailleur?

Quote from video: Listen Jen mounting bolt and move it up or down as needed keep in mind also any changes needed in rotation secure the mounting bolt and inspect the cage.

How do you tension a front derailleur cable?

Quote from video: Just how far the derailleur can move either out or in but to actually control the movement of the derailleur. That's all down to cable tension. So limit screws limit the derailleur.

How tight should a derailleur cable be?

Make sure the derailleur mounting bolt is tight, or shifting will be sloppy no matter how well adjusted the cable is. This usually takes a 5-millimeter hex wrench. If you can’t find the exact specification, 5 to 8Nm is the typical range for this bolt.
Mar 24, 2020

Should you adjust the front or rear derailleur first?

In a nutshell, adjust the front derailleur first, then the rear. Show activity on this post. If the derailers just need minor tweaking (they are basically in adjustment but are “not quite right”) then you adjust the one that is obviously wrong, check the overall adjustment again, then again adjust what needs adjusting.
Jun 9, 2016