In terms of function, both front and rear derailleurs have the same principle.
They guide the chain to a higher or lower sprocket by pushing it while pedaling
. This pushing is assisted by specially shaped teeth, known as shift ramps, which help the chain rise/fall to another sprocket.
Do derailleurs make a difference?
It is more about the package not just difference in a single part.
The higher end parts are going to perform somewhat better
. How much really depends on the person and how they are going to use it. If you are going to only ride your bike a few times a month, then the Deore level is a great component set.
How does front derailleur work?
Why is my derailleur hitting my spokes?
Often, the derailleur hits the spokes
when its hanger is bent following a heavy hit
. If that’s not the case, it could be due to wobbly spokes, misadjusted limit screws, or incorrect cable tension.
How do you adjust a derailleur?
Who invented the derailleur?
So who invented the derailleur? The first, and best, candidate, much favoured by the French, is
Jean Loubeyre
of Paris. He indisputably patented a 2 speed derailleur device called ‘La Polyceler’ in 1895 (French Patent # 245,148).
Can you mix front and rear derailleur?
Do not mix and match derailleurs with other parts of the drivetrain from other manufacturers
. E.g Use only Shimano rear derailleurs with a Shimano drivetrain. While some elements of a drivetrain may be cross-compatible between brands, when it comes to derailleurs and shifters, they are most often not.
What is a derailleur clutch?
The clutch on Shimano derailleurs adds tension to the chain, reducing chain bounce in rough terrain, therefore minimizing “chain slap” against the frame, and keeping as much chain wrapped snuggly around the chainring as possible to prevent it from dropping off the ring.
Why do derailleurs have clutches?
The point of the clutch mechanism is
to tension the chain to keep it in place when riding over rough and uneven ground
, eliminating or at least decreasing ‘chain slap’ — when the chain lashes the chainstay, potentially causing damage — and the risk of the chain unshipping completely.
Can I use a 7 speed derailleur on an 8 speed cassette?
8 speed shifter and cassette, 7 speed derailleur?
You’ll be fine
. There’s no “probably” about it. 6-, 7- and 8-speed gear is all cross-compatible in terms of chain width.
Do SRAM derailleurs have a clutch?
SRAM’s unique clutch system
eliminates chain slack, providing for smoother, quieter, and more secure chain travel.
How do I know what derailleur I need?
When buying a new rear derailleur be sure to
match it with your drivetrain ‘speed’
. 10-speed drivetrains use narrower chains than 9-speed so you’ll need a mech to match. Most rear mechs are made of a polymer and alloy mix but you’ll find carbon fibre in top-end models to shave even more weight.
Why MTB has 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 is L and H on a bike?
The front derailleur is controlled by the left shifter. Many shifters are marked in some way, often numbered or with an
‘H’ for the high gear and an ‘L’ for the low gear
. The ‘1’ or ‘L’ refers to the innermost chainring (closest to the bike).
Why is my derailleur hitting my cassette?
When the spring breaks or wears down, the derailleur becomes “weak”, and the chain pulls it forward too much
. In some cases, the derailleur assumes an awkward position causing rubbing against the cassette. If you have a bad derailleur spring, the solution is to replace it or buy a new derailleur.
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.
How do I stop my rear derailleur from hitting spokes?
How do you adjust a Shimano derailleur?
Do derailleur springs wear out?
That said,
derailleur springs will lose tension overtime
, and pivots will get sloppier. Shifters can wear out too (if you ride enough), and most cannot be serviced back to health. But before you go sinking money into these more expensive components, best try a new cable/housing or get a second opinion.
Why is my front derailleur not shifting?
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.
How do you clean a derailleur?
How do you use a derailleur clutch?
Can you put any derailleur on a bike?
Shimano derailleur compatibility
This means that
you can use an 8 -or 9-speed mountain bike derailleur with road shifters or vice versa
. The only exception is pre-1997 9-speed Dura-Ace gearing, which won’t play nicely with anything because it uses a totally different cable pull ratio.
Can you mix shifters and derailleurs?
In many instances,
it is possible to mix different levels of shifters and derailleurs from the same brand
(e.g. Dura-Ace/Ultegra/105; Red/Force/Rival; Super Record/Record/Chorus), however it’s not safe to assume that this will always be the case.
Can I use a 9 speed derailleur on a 8 speed cassette?
Condensed answer: 8 and 9-speed derailleurs have the same rear shift ratio but only when both models are made either by Shimano or SRAM. In consequence,
a 9-speed derailleur can work just fine with an 8-speed cassette produced by the same brand
.
Can I use a 9 speed derailleur on a 7 speed cassette?
SRAM and Shimano derailleurs, cassettes, chains mix just fine
. You just have to be careful with the shifters. SRAM numbered shifters only work with SRAM numbered rear derailleurs.
