Recently we introduced new over-sized derailleur pulleys for Shimano and Sram derailleurs.
Adding another option for derailleur pulleys may have made it more challenging choosing the best setup for your bike.
I created this short derailleur pulley buyers guide to help, so let's have a look at what fits best on which derailleur:
The monikers for different price and quality of group sets has not changed in many years: everybody knows Dura Ace, Ultegra and 105 for road bikes and XTR, XT and SLX for mountain bikes.
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. Numbers in the 8000 determine the latest generation Ultegra.
Recently Shimano started synchronizing the Road and Mountain classification: R9100 is Dura Ace, M9100 is XTR.
This is what works best for your setup:
Dura Ace R9100, Ultegra R8000 and 105 R7000 series:
Our 12 tooth pulleys are slightly larger than the stock Shimano pulleys. The narrow wide tooth profile makes the shifting nice and crisp.
If you like the oversized pulleys that are gaining popularity fast nowadays, we can fit a 12 and 14 tooth combo in these derailleurs without the need to swap the cage.
Dura Ace 9000
Installing the 12 tooth pulleys on these derailleurs will cause interference between the chain and cage. For this reason, the 11 tooth pulleys work best. They are available with hybrid ceramic and full ceramic bearings.
Ultegra 6800 and 105 5700
These derailleurs work best with the 12 tooth pulleys. It is a tight fit on the short cage derailleurs, but we have tested the setup for thousands of miles on road and gravel without any hiccups.
10 speed Shimano road groups:
The 11 tooth pulleys are a great fit, but require a slightly different spacing between the cages. Just ask for the 10 speed setup with your order and we will make sure they ship correct for your derailleur.
11 speed mountain bike derailleurs:
The 12 tooth narrow wide pulleys work like a dream for chain retention and accurate shifting on all group sets.
10 speed mountain bike derailleurs
Your choice is simple; use the 11 tooth pulleys with cross seals.
2x road systems
1x 11 speed derailleurs
The one by eleven systems that are very popular on gravel bikes and mountain bikes that go a few years back run on the 12 tooth narrow wide pulleys.
1x12 speed Eagle derailleurs
In order to achieve a better ground clearance for the long chain that needs to wrap around that huge 50 tooth cassette, Sram increased the size of the bottom pulley to 14 teeth. Here is the Eagle set by Kogel.
11 speed derailleurs
10 speed derailleurs are not compatible with Kogel pulleys
Your Still Not Sure
Hopefully, this helps clear up confusion about which ceramic derailleur pulley set will work best for your bike. Still need help? Not a problem. Just drop us an email or call. We love talking with fellow cyclist helping simplify your buying process.