Are derailleur jockey wheels universal?
Are derailleur jockey wheels universal?
Many jockey wheels are universal, a few are brand or possibly even mech specific. Take care if you have anything particularly exotic, a standard pair may not do the job.
Are all derailleur pulleys the same?
The pulleys that will actually fit on your derailleur are determined by the generation of your group set. This is a number stamped on every part and goes by a four digit number. For instance any number between 9100 and 9199 indicates the latest generation Dura Ace.
Do derailleurs pulleys wear out?
Worn derailleur pulleys (also known as “jockey wheels”) will not cause excessive wear on a chain because they aren’t made of metal. Eventually, though, the bushings inside will become worn and the outer teeth will wear down. Park illustrates the latter progression in their article on rear derailleur overhaul.
Which pulley is which on rear derailleur?
Rear derailleurs use a cage fitted with two pulleys. The lower pulley pulls backwards to give tension to the lower section of chain. It is called the tension pulley, or ‘T’ pulley for short. The upper pulley guides the chain to the sprockets.
Is it worth upgrading jockey wheels?
While well-serviced jockey wheels can work for years, there will come a point when these workhorses will need to be replaced. If the teeth on your jockey wheels are heavily worn, then this can negatively affect the quality of your shifting as the teeth can fail to engage.
Are all Shimano jockey wheels the same?
They’re both 11t. But on stock Shimano pulleys, the upper and lower wheels have a different profile. The lower wheel has shorter teeth than the upper one. The KCNC doesn’t seem to differentiate between upper and lower wheels.
What do oversized derailleur pulleys do?
Kogel: The main goal for an oversized derailleur cage is to reduce drivetrain friction. Larger wheels require the chain to articulate less. Bending a chain causes friction between the plates. By making the wheels larger the chain needs to bend less every time it runs through the derailleur.
Which way round do Shimano jockey wheels go?
The chain needs to go to the right and over the upper jockey wheel, and left and under the lower jockey wheel.
Which pulley is the guide pulley?
The ‘G’ or guide pulley, sometimes called the centeron pulley goes in the top position closest to the cassette. Most can go either way around but some have a certain direction of rotation, if that’s the case with yours they will have a direction arrow on them.
Are oversized pulley wheels worth it?
‘Larger pulley wheels decrease the amount of articulation required from the chain links,’ says Ard Kessels, founder of Kogel Bearings. ‘As friction is created through chain plates sliding back and forth when articulating, there is less friction created when the chain moves less.