For a job like this we stock standard steel rollers with sealed bearings, and nylon rollers for owners who want quieter operation - nylon doesn't rattle in cold track the way an older steel roller does, which matters in a climate band this cold where metal contracts and clearances tighten up in January. We also carry the common stem lengths used on torsion-hardware doors from the 1960s and 70s, since that's most of what's installed on this side of the service area. What we don't carry on the truck is obsolete stamped hinge hardware specific to a handful of older door brands - if your hinge plates themselves are cracked or stripped, not just the rollers, that sometimes means a short parts wait rather than a same-visit fix. We'd rather tell you that up front than pretend every door from 1963 uses parts off today's shelf.