shoot, now after doing some research I'm not so sure i want to bother with replacing them. seems like a large amount of people who purchased the AFC pulleys claimed for poor shifting because there was no lateral movement, while others claimed it had no effect on their shifting. The KCNC ceramic weighs in at 8g and has the lateral movement available.
I have just ebayed and found the KCNC ceramic pulleys all listed with 9gr -so 18gr for the pair- and within a price range of 77 to 62 bucks.
Available on a offer made so you may try to get them for 40 usd plus shipping.
No pulley has a build-in lateral movement if I have understood correct.
Question is if you can mount them with a slight lateral movement.
I am running the AFC pulleys now for 6900kms in my dura ace 7900 derailleur with a KMC chain currently and am very happy with the shifting performance and quiteness.
Purchased them in black and they still are black.
May be people should follow the manufacturer instructions while mounting.
AFC instructed me to build them in with a slight lateral movement of 0.5 mm and do not tighten them against the derailleur cage walls because o/wise their Delrin dustcaps will get squeezed towards the bearings which will cause stopping the bearings from turning.
This is exactly how I am running them.
I have read that some folks had pulleys sliding from the bearings with AFC.
Do not know if this is happening with big casettes in MTB set ups where the top pulley is laterally more stressed .
I run them with a 12-25 dura ace casette.
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