What criteria should be used to determine when its time to replace headset bearings, and are there any reliable methods for evaluating their condition without relying solely on visual inspection or waiting for symptoms like play or rough turning to appear?
More specifically, is it sufficient to simply track the number of miles or hours ridden, or are there other factors such as road conditions, riding style, and maintenance habits that should be taken into account when deciding when to replace these critical components?
Additionally, are there any tools or techniques available that can help diagnose worn or failing headset bearings, such as measuring the amount of play or using specialized gauges to assess their condition?
Lastly, how do manufacturers recommended replacement intervals align with real-world experience, and are there any instances where its better to err on the side of caution and replace these components more frequently to avoid the risks associated with catastrophic failure?