Shower Seal Fit Fit by the numbers

Shower Door Replacement Parts

Seals stop the water; these parts move the door. Each page shows how to identify the exact roller, guide, handle, hinge, or track you have — the one or two measurements that decide fit — plus failure symptoms and a compact replacement walkthrough.

Sliding bypass shower door, end view End-on cross-section of a bypass shower door: rollers hang both glass panels from the header rail; below, the panels pass through a bottom track with weep holes and are steadied by a small plastic guide. header (top rail) rollers ride inner rails inner panel outer panel bottom guide bottom track weep hole — keep clear tub rim / curb
Bypass doors hang from the rollers on the header — the bottom track carries no weight. The track only channels water (weep holes drain it back into the shower) and the center guide keeps the panels tracking straight.

  • Shower Door Rollers

    Shower door rollers are the small nylon wheels that carry each sliding bypass panel along its track. Most house doors take a 3/4″ (19mm) or 7/8″ (22mm) wheel. Match three things to your old roller: wheel diameter, edge profile (flat or gro…

  • Shower Door Bottom Guide

    The shower door bottom guide is the small plastic U-clip screwed to the sill at the center of the opening. It carries no weight, since bypass panels hang from rollers on the top track; it only stops the panel bottoms from swinging. Before …

  • Shower Door Handles

    Replacement shower door handles are matched by two numbers: how many holes are drilled in the glass and how far apart they sit. One hole about 1/2 inch across takes a knob; two holes take a pull, and 6 or 8 inch center-to-center covers nea…

  • Shower Door Hinges

    Frameless shower door hinges are solid brass clamps that grip the glass through fitted gaskets and pivot on a pin, mounted to the wall or to a fixed panel and weight-rated per pair. Before buying, confirm five things: hinge style (pivot or…

  • Shower Door Track

    The shower door track is the aluminum extrusion the sliding panels run in: the top rail carries the rollers on a tub slider, the bottom rail positions the panels and dams water. Replacements are cut-to-length extrusions, so the only critic…

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