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In the world of HO scale model railroading, one of the first choices a hobbyist makes is selecting a track system. While there are several codes available, HO Code 100 track has stood the test of time as the most widely used and durable option. Whether you’re building your first layout or planning a large permanent railroad, Code 100 remains an excellent choice thanks to its strength, affordability, and compatibility with nearly all HO scale rolling stock.
The “Code” of track refers to the rail height measured in thousandths of an inch. In this case:
Code 100 track = 0.100 inches tall.
This makes it slightly taller than Code 83 track (0.083 inches tall), which is more common among hobbyists who prioritize realism. While Code 100 might not be as visually accurate, it provides unmatched strength and is far more forgiving when it comes to handling and long-term use.
Hobbyists often choose HO Code 100 track for several reasons:
Exceptional durability – Its taller profile means rails are stronger and less prone to bending or damage.
Beginner-friendly – Perfect for those just starting out, thanks to its ease of installation.
Budget-friendly – Often more affordable than Code 83, making it ideal for larger layouts.
Compatibility with older models – Many vintage locomotives and cars with deep wheel flanges run smoothly on Code 100.
Club layout tested – Ideal for high-traffic layouts where multiple operators run trains frequently.
For these reasons, Code 100 has remained a staple in the hobby for decades.
The choice between HO Code 100 and HO Code 83 usually depends on a hobbyist’s goals:
Code 100: Stronger, more affordable, and better suited for older models or layouts with heavy use.
Code 83: More realistic in appearance and a closer match to prototype rail standards.
Many modelers actually use both codes together—placing Code 100 in hidden staging yards or tunnels, and Code 83 on visible scenic portions of the layout. This approach provides durability where needed and realism where it counts most.
Like other codes, Code 100 comes in a wide variety of options to accommodate all types of layouts:
Straight track – For mainlines and sidings.
Curved track – Available in multiple radii, from tight curves to broad sweeping arcs.
Flex track – Offers complete freedom in design, allowing custom curves and smooth transitions.
Turnouts and crossings – Essential for yards, junctions, and complex operations.
Snap-track systems – Beginner-friendly sectional track with pre-set radii for quick assembly.
This variety ensures hobbyists can design layouts ranging from simple starter loops to advanced operations.