Do bike derailleurs wear out?

Derailleurs will last almost indefinitely. The jockey wheels will wear out in time (tens of thousands of km) but the rest of the mechanism shouldn’t see significant wear.

How do I know if my rear derailleur is worn out?

All derailleurs wear out at some point. Check for wear by pulling laterally on the lower cage. Compare this movement in the linkage of a new derailleur. Sloppy pivot and linkages will produce inconsistent shifting, and the only solution is a new derailleur.

How often do you need to adjust derailleur?

I adjust mine every 150-200 miles or so, usually I do it all in one step as I like to clean my chain at that interval and put a stretch indicator to it. Your deraileur should stay properly adjusted if the cable is pre-strechted.

How long do bike derailleurs last?

Derailleurs will last almost indefinitely. The jockey wheels will wear out in time (tens of thousands of km) but the rest of the mechanism shouldn’t see significant wear.

How do I know if I need a new derailleur?

If there’s play, get a new one. Also, drip some Tri-Flow or something into all the pivots. If it’s really dirty and sticky, it’ll have a harder time with the shift you describe. If with clean, lubricated pivots the derailleur still won’t move well, you probably need a new one.

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Do you adjust the front or rear derailleur first?

In a nutshell, adjust the front derailleur first, then the rear. 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.

What do the screws do on a rear derailleur?

Derailleurs are fitted with limit screws that stop the derailleur from moving too far inward or too far outward. If you look closely as the derailleur moves, you can see the limit screws stopping the derailleur at each end of it’s travel.

Can you replace a rear derailleur?

Believe it or not, it’s not difficult to replace the rear derailleur yourself. Before replacing a “bent derailleur” make sure it’s not just the derailleur hanger! … If you can’t (or don’t want to) remove the idler pulley from your new derailleur, you’ll need to break the chain.

Do rear derailleur springs wear out?

Essentially, yes. All bike chains are 1″ pitch (center to center of the pins), but the chain stretches out with use, and the cogs also wear. So after a while, neither is what it is supposed to be. Often a chain and cogs will wear together, so the old chain will fit the cog better than the new chain.

Why does my derailleur keep breaking?

Broken derailleur hangers usually occur as a result of either accidentally shifting the derailleur into the spokes of your rear wheel, or from bending them back and forth too many times.

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Will any derailleur fit my bike?

A derailleur for your mountain bike should match the specifications on the original derailleur. That is, while it doesn’t need to be the same model of derailleur, it does need to be the same brand, in almost every case. It also needs to match the number of gears, or have more intended.