Track interchange

Whether two brands' HO or N scale track will physically join comes down mostly to whether the rail is the same height — manufacturers publish this as a "Code" number (Code 83, Code 65, and so on). This page cross-checks the Code numbers each manufacturer has published for these three lines. It does not cross-check roadbed height or width, because none of the three publish that measurement on their consumer product pages (see Known gaps below).

For HO, the Code 83 vs Code 100 page sorts these makers' HO lines by rail code and sets out what the makers list for joining Code 83 to Code 100.

Same rail code — compatible Different rail code — needs a transition piece Not published by the manufacturer

Cross-brand rail-code check

4 checks across HO and N scale · 1 same code · 1 different code · 2 not published by the manufacturer. Counted from the table below — see method.

Rail code (rail-height) cross-check, by scale
System A	System B	Scale	Status
Kato USA UNITRACK	Atlas True-Track	HO	Same rail code — compatible Both publish Code 83 for HO — same rail height. Roadbed height and joiner fit haven't been checked (see fact sheets below).
Kato USA UNITRACK	Atlas True-Track	N	Different rail code — needs a transition piece Kato USA Code 80 vs Atlas Code 65 — different rail height, needs a transition piece. Neither manufacturer publishes an official transition track for this pair.
Kato USA UNITRACK	Bachmann E-Z Track® (Nickel Silver w/ gray roadbed line)	HO	Not published by the manufacturer At least one side does not publish a Code number for HO — not published by the manufacturer, not guessed here.
Atlas True-Track	Bachmann E-Z Track® (Nickel Silver w/ gray roadbed line)	HO	Not published by the manufacturer At least one side does not publish a Code number for HO — not published by the manufacturer, not guessed here.

Manufacturer fact sheets

Every field below is either a manufacturer's own published value with its source link and the date we checked it, or is marked not published by the manufacturer.

Kato USA — UNITRACK HON

Roadbed: One-piece molded gray plastic roadbed (built into the track section) source · verified 2026-09-25
Rail code (HO): Code 83 — Kato's shop and overview pages (katousa.com/unitrack/) describe the rail only as nickel silver and don't print a Code number; the Code number comes from Kato's own UNITRACK catalog PDF, page 27, which states the rail height as 2.11 mm (0.083 in.). source · verified 2026-09-25
Rail code (N): Code 80 — From the same catalog PDF, page 8, which states the rail height as 2.03 mm (0.080 in.). Kato's shop and overview pages don't print a Code number for N scale either. source · verified 2026-09-25
Joiner: UniJoiner — removable metal joiner; an insulated version is also sold source · verified 2026-09-25
Cross-brand joiner statement: Kato states the same UniJoiner piece works across N scale and HO scale UNITRACK, and also on other companies' TT scale and HOn3 scale track. — This is Kato's own cross-brand claim, but it names TT scale and HOn3 scale track — it does not name Atlas or Bachmann HO/N track specifically, so it can't be read as a claim that UniJoiner mates with Atlas True-Track or Bachmann E-Z Track. source · verified 2026-09-25
Official transition track to another brand: manufacturer confirms none published (full catalog checked) — Negative check, not a gap: the full 40-page UNITRACK catalog PDF was re-extracted and searched page by page for transition/Atlas/Bachmann/adapter/code 5/code 6/code 100/code 83/code 80/other manufacturer/other companies — the only hits were pages about the UniJoiner itself, power terminals and set-track packages, with no cross-brand or cross-Code transition-track item anywhere. Kato's own site search for "transition track" was also checked and returned only UNITRAM (Kato's separate street-tram track line) results, not this kind of product. This does not prove Kato has none, only that neither the catalog nor the site search turns one up. source · verified 2026-09-25

Atlas — True-Track HON

Roadbed

Removable plastic roadbed (HO version: fine brown ties) source · verified 2026-09-25

Rail code (HO)

Code 83 — Atlas also sells HO rail without integrated roadbed in Code 100 and Code 83, per the shop's own category navigation. source · verified 2026-09-25

Rail code (N)

Code 65 — Atlas also sells N rail without integrated roadbed in Code 80 and Code 55, per the shop's own category navigation. source · verified 2026-09-25

Joiner

Rail joiners built into the True-Track roadbed sections; also sold separately as HO Universal Rail Joiners (Nickel Sil.), item 0170, 48 per pack, and HO True-Track Terminal Joiners, item 0465 source · verified 2026-09-25

Cross-brand joiner statement

not published by the manufacturer — The product page for the Universal Rail Joiners gives the pack spec and item number only; it does not state whether these joiners fit Kato or Bachmann rail. source · verified 2026-09-25

Official transition track to another brand

none found on the maker pages we checked — No Atlas-published transition track for joining True-Track to another manufacturer's (Kato or Bachmann) HO or N track system turned up in our check.

Same-brand transition track (different Code, same manufacturer)

This is Atlas's own product line for joining its different rail-code lines together — not a cross-brand transition track for connecting to another manufacturer's HO or N scale track.

N CODE 80 TRANSITION TRACK, item 2590, 2 pcs/pkg, Code 65 to Code 80 source · verified 2026-09-25
N CODE 55 TRANSITION TRACK, item 2093, 2 pcs/pkg, Code 65 to Code 55 source · verified 2026-09-25
N CODE 80 GRAY BALLAST TRANSITION TRACK, item G2590, Code 65 to Code 80 source · verified 2026-09-25
N CODE 55 GRAY BALLAST TRANSITION TRACK, item G2093, Code 65 to Code 55 source · verified 2026-09-25

Bachmann — E-Z Track® (Nickel Silver w/ gray roadbed line) HO

Roadbed: Gray plastic roadbed (Nickel Silver product line) source · verified 2026-09-25
Rail code (HO): not published by the manufacturer — Bachmann's own shop describes this line only as “nickel silver track and gray roadbed”; the product page does not print a Code number. source · verified 2026-09-25
Joiner: not published by the manufacturer — Bachmann sells an “E-Z Track® Connector Assortment” (item 44592) for jumpering/filling gaps, but the shop does not give the standard rail joiner a product name of its own. source · verified 2026-09-25
Cross-brand joiner statement: not published by the manufacturer — No cross-brand joiner compatibility statement found on Bachmann's shop pages we checked.
Official transition track to another brand: none found on the maker pages we checked — No Bachmann-published transition track for joining E-Z Track to another manufacturer's (Kato or Atlas) HO track system turned up in our check, even after checking additional paths (instruction sheets, the Track Planning Book PDF, and other E-Z Track category/product pages).
Not to be confused with: Bachmann also sells a separate "Flex Track" line (item 44371) stated as Code 100 nickel silver rail conforming to NMRA standards — this is a different product line from E-Z Track (which still has no published Code value) and must not be used to fill in E-Z Track's Code value. source · verified 2026-09-25

Known gaps

Roadbed height and width (in millimeters) were not found on any of the three manufacturers' consumer product pages — that measurement usually only appears in a printed manual or has to be measured by hand, so we mark it not published rather than guessing.
Bachmann also sells a separate “Steel Alloy w/ black roadbed” E-Z Track line; we only checked the Nickel Silver w/ gray roadbed line.
Bachmann's N scale E-Z Track line has no sourced product page here (only the HO Nickel Silver line does), so it is left out of this page's N scale comparisons rather than listed with guessed values. Its curve radii, from Bachmann's own category pages checked 2026-09-26, are on the minimum curve radius page.
None of the three manufacturers publish a transition track for connecting to either of the other two brands' HO or N track. For Kato we went further and confirmed that none is published, after re-checking the full UNITRACK catalog PDF and Kato's own site search; for Atlas and Bachmann it remains not found on the pages we checked, which is a weaker, non-exhaustive statement, not a claim that none exists.
Atlas does publish an official N scale transition-track line (items 2590/2093/G2590/G2093), but it only joins Atlas's own Code 65 True-Track to Atlas's own bulk Code 80 or Code 55 rail — a same-brand, cross-Code product, not a cross-brand transition track to Kato or Bachmann track. Don't read the existence of this Atlas line as evidence that cross-brand transition track exists anywhere.
Bachmann's "Flex Track" line (item 44371) is a separate product from E-Z Track and is stated as Code 100; E-Z Track's own Code value is still not found even after checking additional paths (instruction sheets, the Track Planning Book PDF, N scale and HO Steel Alloy product pages).