There are two main reasons for stepping away from the traditional 11 tooth derailleur.
Does ceramic pulley make bike easier.
Our sram xx1 compatible 12 tooth pulley set can fit on shimano mountain bike derailleurs by changing a dust.
Recently we have been receiving an increasing amount of questions about oversize pulley wheels.
Fitting ceramic bearings on your bike may be a bit like fitting a formula one gearbox in your ford fiesta and expecting it to perform as well after 100 000 miles.
Rider x mar 8 at 6 41.
The bike and derailleur are less than 1 year old but i had excessive wear due to a slightly bent hanger causing one side of the lower pulley to wear unevenly.
We are always ready for a bit of experimenting on our own bikes.
For that little bit of extra speed fsa ceramic derailleur pulleys use low resistance long wearing silicon nitride ceramic hybrid bearings and pulley wheels made from durable dupont zytel.
For example kogel now offers 12 14t pulleys to fit directly into the latest 11 speed shimano road rear derailleurs and the company even has 14 14t pulleys to fit into 12 speed mountain bike.
Someone should make a brand of bike components for bike geek commuters where you can buy ceramic bushing pulley wheels metal bodied road pedals and frames with full length external cabling external bottom brackets and 1 1 8th head sets.
These pulleys will far outlast normal pulleys and are compatible with most derailleur systems including campagnolo 10t or shimano 11t.
On my bike however even with the b tension screw bottomed out the upper pulley contacted the 28 in the big ring.
Ceramic speed s faq says the ospw is compatible with up to a 28 tooth cassette.
With the ceramicspeed osps system and kcnc s being very visible in the market and recently sram introducing a 14 tooth bottom pulley for their eagle derailleurs it sure is a trend that did not go unnoticed.
For bottom bracket applications the maximum sustained rpm may be 130 explains lew.