Originally Posted by
Steve_sr
The current symptom is that you have to overshift... a lot, especially in the smaller cogs... Almost to the next gear to get it to shift. The pulley does have some noticeable wobble to it. Peripheral wear of the pulley? What do I look for and how much is too much?
FWIW I've never seen a pulley outlast it's bearings.
However, you've answered your own question. Regardless of how and why, pulley performance will degrade over time, causing sloppier shifting.
So, it's purely a question of when it's bad enough for you to call it quits.
Originally Posted by
Steve_sr
..... I wonder why Shimano just didn't use two regular sealed bearing pulleys like the lower wheel.
Marketing hype aside, things like cable friction make index shifting less than perfectly precise. A floating jockey wheel buys a degree of forgiveness, and reduces or eliminates clatter when trim is a bit off. The tradeoff is needing more overshift and recovery as you shift.
So, some float is a positive, but more float becomes a liability.
-----
Like Andy, I prefer the added crispness of non-floating pulleys, but sometimes need to tweak the trim by plucking the bare wire at the downtube.