The Short Version
- 4×114.3 with a 66 mm hub bore — identical to the S13 Silvia.
- But the factory offset is different. Every 180SX grade reads +45. The S13 Silvia grades read +40.
- So the wheels bolt across and sit five millimetres apart. That is the answer to “are they identical”.
- The early 180SX is chassis RS13, not RPS13. RPS13 only appears from the February 1991 facelift.
The Five Millimetres Nobody Mentions
The 180SX and the S13 Silvia share a platform, and the standard advice is that they are the same car with different bodywork. On the hub, that is true: both are 4×114.3 with a 66 mm bore, confirmed on grade pages from each.
What is not the same is the factory offset. Across the entire 180SX history — the 1989 RS13 Type I through the 1996 RPS13 Type X — every grade reads +45. Across the S13 Silvia grades, the figure is +40.
Five millimetres will not stop anything fitting. It does mean that a set of 180SX wheels on a Silvia sits five millimetres further out, and a set of Silvia wheels on a 180SX sits five millimetres further in, than the car came with.
On a car whose entire aftermarket revolves around getting the wheel exactly where you want it, that is worth knowing rather than discovering.
Factory Specification
| Car | Chassis | Period | Grade | Wheel | Tyre | PCD / Holes / Bore |
|---|---|---|---|---|---|---|
| 180SX | E-RS13 | 1989.03–1991.01 | 1.8 Type I 5MT | 15×6J +45 | 195/60R15 | 114.3 / 4 / 66 |
| 180SX | E-RPS13 | 1996.08–1999.01 | 2.0 Type X 4AT | 15×6J +45 | 205/60R15 | 114.3 / 4 / 66 |
| S13 Silvia | E-S13 | 1988–1993 | 1.8 K’s 5MT | 15×6J +40 | 195/60R15 | 114.3 / 4 / 66 |
RS13 or RPS13?
Worth getting right when you are matching parts listings. The March 1989 to January 1991 cars are RS13 and KRS13. The RPS13 and KRPS13 codes appear from the February 1991 facelift onward.
Both eras show the identical 4×114.3 / 66 mm / +45 specification, so this is a paperwork distinction rather than a fitment one. But a seller listing an “RPS13” from 1990 has the code wrong, and that is worth noticing.
The Sileighty
The Sileighty is a 180SX body with an S13 Silvia front end. Enthusiasts had been doing the conversion for years when Nissan sanctioned a factory version: 500 units built by the tuning shop Kids Heart from 1 May 1998, sold through the Nissan dealer network and serviceable at any Nissan dealer, in five colours, with the name trademarked by Nissan for that run.
It does not appear as a grade in the factory wheel database, so we have no verified wheel specification for it. Since it is an RPS13 underneath with different front bodywork, we would expect it to match the contemporary 180SX Type X at 4×114.3 / 66 mm / +45 — but that is an expectation, not a confirmation.
Our source for the Kids Heart production details is a Japanese encyclopaedia article that carries its own citation warning, so treat the 500-unit figure as well-established enthusiast history rather than as a documented fact we verified.
Sizing
Nobody keeps 15×6J on one of these. The 180SX and S13 are the drift platform, and the usual territory is 17×9J to 18×9.5J at 0 to +25, front and rear, with camber and arch work.
The one thing worth saying: 4×114.3 limits you. Most modern aftermarket wheels in the sizes people want are made in 5×114.3, which is why five-lug conversions using S14 or S15 hubs are so common on these cars. If you are planning a big wheel setup, price the conversion before you price the wheels.
66 mm hub rings are needed with most aftermarket wheels while you are still four-lug.
Importing
The 180SX ran from March 1989 to 1998. The whole model is past the US 25-year mark. North America got the same car as the 240SX fastback, but with the KA24 engine rather than the SR20DET — which is the reason the JDM car gets imported.
What We Could Not Verify
- The Sileighty’s wheel specification. Not a grade in the database.
- The KRS13 and KRPS13 Super HICAS variants and the late Type S and Type G grades individually. We read their offsets from the index, which are consistent at +45.
Seen on the road
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