The Short Version
- Both are 4×100.
- The Porte’s bore is a published 54 mm. The Raum’s has never been researched — on any grade, of either generation.
- They are close siblings from the same maker in the same class, and only one of them is documented.
- The Raum’s offset drops from +45 to +39 at the 2003 generation change.
The Cleanest Example We Have of a Data Gap
We have written several times now about badge twins where one page is populated and its partner is not — the Carina ED and Corona EXiV, the Wingroad and AD Wagon, the Ipsum and Gaia.
The Raum and Porte are not badge twins — they are separate models — but they are the same maker, the same class, the same era and the same sliding-door small-MPV idea. And the pattern repeats:
| Model | Chassis | Period | Wheel | Tyre | PCD / Holes / Bore |
|---|---|---|---|---|---|
| Raum gen 1 | EXZ10 (2WD), EXZ15 (4WD) | 1997–2003 | 5.5J×14 +45 | 175/65R14 | 100 / 4 / Not researched |
| Raum gen 2 | NCZ20 (2WD), NCZ25 (4WD) | 2003–2011 | 5.5J×14 or 15 +39 | — | 100 / 4 / Not researched |
| Porte | NCP141, NCP145, NSP140, NSP141 | 2004–2012 | 5J×15 +39 | — | 100 / 4 / 54 |
| Porte | NNP10, NNP11, NNP15 | 2012– | 5.5J×14 +33 | — | 100 / 4 / 54 |
We opened Raum grade pages fourteen years apart — an E-EXZ10 from 1997 and a CBA-NCZ20 from 2009 — and both print 調査中. It is not one missing entry; the model has never been researched.
What a Raum Owner Should Actually Do
Toyota’s small-car bore is 54 mm, and the Porte — same maker, same class, same period, same 4×100 — is a documented 54. So is the Sprinter Marino, and so is the Vitz.
A Raum is very likely 54 mm. We are not printing it as the Raum’s specification, for the same reason we never do: the inference is strong but it is still an inference, and this series exists partly to stop plausible inferences becoming published facts.
Measure the hub. Ten minutes, a caliper, and you will have settled something the databases have not managed in twenty-eight years.
The Offset Change Is the Practical Point
The Raum moves from +45 to +39 at the 2003 generation change. Six millimetres, and the bolt pattern does not change — so first-generation wheels bolt straight onto a second-generation car and sit 6 mm further in.
That is small enough not to matter mechanically and visible enough to notice. If you are buying used Raum wheels, ask which generation they came off.
The Porte goes the other way across its own generations, from +39 to +33.
Buying
4×100 is the most common small-car pattern in the world, so wheels are abundant and cheap. Your check is the bore, and on 4×100 it is the whole game:
- 54.1 mm — Toyota
- 56.1 mm — Honda
- 59.1 or 60 mm — Nissan
A Honda or Nissan-bored wheel will sit loose on a Toyota hub. It will bolt up and it will not be located, and on a tall vehicle with a sliding door and a family inside, that is not a corner to cut.
Both cars are narrow with very little arch room. 15×5.5J or 15×6J in the +35 to +45 band is about the limit before you are fighting the bodywork.
Importing
The Raum launched in December 1997, so first-generation cars are eligible for US import now through 2028. The Porte arrived in 2004 and follows from 2029.
Neither was sold outside Japan. The Porte’s single enormous passenger-side sliding door — there is no conventional front passenger door at all on the first generation — is one of the more genuinely unusual packaging decisions in modern car design, and it is the reason to want one.
What We Could Not Verify
- The Raum’s hub bore, on any grade of either generation. Confirmed unresearched on two grade pages fourteen years apart.
- Precise Porte generation-boundary dates. The NNP10 chassis code appears across a wider window than we could cleanly split.
- Tyre sizes for most grades of both cars.