Replacing Drum Glides And Felt

Im Gonna Try To Replace The Glides And Felt But How Do U Know If U Need To Replace The Top Bearing?it Looks Ok To Me But I Dont Know What To Look For!!almost All Of Glides Were Torn Off.does Anyone Have Any Suggestions As To What Would Wear The Glides Just In Case I Get It Together And That Aint The Problem I Would Love To Know What To Look For

If there is no visible damage then replacing the glides and felt should be just fine.