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Questions and answers about sports

Front derailleur cable keeps snapping, change of riding habits perhaps?

5 min read

Asked by: Renee Jones

How tight should front derailleur cable be?

It is generally a good idea to lubricate the pivot point of the front derailleur with a light lubricant. The cable inner wires should also be lubricated. If you have loosen the inner wire pinch bolt, lubricate those threads as well. When tightening this pinch bolt, secure to approximately 30-40 inch-pounds.

How do you adjust the tension on a front derailleur cable?


Quote from video: On the derailleur now on Shimano. That's just how it is so they've added a little trim function into the derailleur. It's like a half click that allows it to silence it. But if I'm being completely

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.

How do I make my front derailleur smoother?

Quote from video: Between the inner derailleur plate and the chain turning. The screw clockwise will decrease the gap between the chain and the inner derailleur plate and turning the screw counterclockwise.

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.

How do you tighten a cable tension?

Quote from video: The bolt that crimps your cable tight and pull that slack tight with your hand or with a pair of pliers not too tight you don't really need to wrench.

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.

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).

Why is my chain rubbing front derailleur?

The reason the chain rubs is because the cable is too loose. And when it’s too loose, shifting onto the large chainring results in only a partial shift. With sufficient tension on the derailleur cable, the derailleur cage will move to its full outside limit and there will be clearance for the chain – and no rubbing.

Why do mountain bikes have no front derailleur?

Mountain bikes no longer have a front derailleur because of the invention of the wide range rear cassette, meaning you can have the same range of gears with fewer parts, which saves weight, and keeps things simpler. Also making the bike build look cleaner.

What does H and L mean on a bike?

You need to adjust the high (H) and low (L) limit screws on the derailleur. Viewed from behind the bike, the H screw limits how far the derailleur can move to the right, while the L screw limits how far the derailleur can move to the left.

Where should front derailleur sit?

The front derailleur should run parallel to the chainrings. If it doesn’t, slacken the bolt fastening it to the frame and rotate it into the right position. When directly above the largest chainring, the outside edge of the derailleur should sit 2-3mm above the teeth of the chainring.

How do you adjust a front Shimano derailleur?

Quote from video: What we want to go for this one set up a little too high. So Shimano recommends that you have it at between one and three millimeters off the top of this tooth to the bottom of the derailleur cage.

How do you fix the front gears on a bike that won’t shift?

Quote from video: But if the bike has full housing without stops that doesn't work you will need to loosen the pinch bolt to get a feel for how the cable is operating. If it feels gummy install a new cable and housing.

How do you adjust a front derailleur on a road bike?

Quote from video: To select the highest gear. The smallest cog wheel on the rear hub if the bike has three chain rings. Make another shift onto the biggest chain ring if the bike only has two chain rings. It's already

Why won’t my front derailleur shift up?

Common Front Derailleur Problems. Front derailleurs may cause sluggish or inaccurate shifting because (A) the derailleur body is not positioned properly, (B) the derailleur limit screws are not adjusted correctly, (C) the mechanism is dirty or (D) the cable is damaged or improperly tensioned.

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.

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.