The R34 is the easy one. After two generations of splitting the range between four lugs and five, Nissan standardised: every R34 Skyline is 5×114.3, 66.1 mm, M12x1.25. From the 2.0-litre 20GT up to the BNR34 GT-R, the studs are the same.
What remains is the offset split that has run through the whole Skyline line: ET30 for the GT-R, ET40 for everything else. Ten millimetres, and about two and a half inches of rim width.
Section 1: OEM Wheel Specifications by Model
| Model | Chassis Code | Bolt Pattern | Hub Bore | Thread | OEM Wheel | OEM Tyre |
|---|---|---|---|---|---|---|
| GT-R | BNR34 | 5×114.3 | 66.1 mm | M12x1.25 | 9Jx18 ET30 | 245/40R18 |
| 25GT-t Type M | ER34 | 5×114.3 | 66.1 mm | M12x1.25 | 7.5Jx17 ET40 | 225/45R17 |
| 25GT | ER34 | 5×114.3 | 66.1 mm | M12x1.25 | 6.5Jx15 ET40 6.5Jx16 ET40 |
205/60R15 205/55R16 |
| 25GT-4 | ENR34 | 5×114.3 | 66.1 mm | M12x1.25 | 6.5Jx15 ET40 | 205/60R15 |
| 20GT | HR34 | 5×114.3 | 66.1 mm | M12x1.25 | 6.5Jx15 ET40 7Jx16 ET40 |
205/60R15 205/55R16 |
Bolt pattern, hub bore and thread size are identical across the entire R34 range. Only rim size and offset differ by model.
Section 2: Offset Comparison & Fender Clearance Visualization
A Japanese-market BNR34 on 18-inch wheels close to the factory ET30 window. — via @@masaki_snowman_bnr34
Section 3: The GT-R’s 9Jx18 ET30
The BNR34 arrived with a specification that has become a reference point for the entire JDM aftermarket: 18×9 +30 on a 245/40R18, wearing a NISMO LM GT4 in five-spoke form on many cars.
Two things follow from it:
- The R34 GT-R’s arches were designed around it. Going wider than 9.5J or lower than about ET20 on standard bodywork will start contacting the rear arch lip under load.
- It set the template for replicas. A very large proportion of the 18×9 +30 wheels sold today exist because of this car. If you are buying an LM GT4 secondhand, verify the forging marks and the JWL/VIA stamp — the design is heavily copied.
The genuine NISMO LM GT4 remains in production in 18×9.0J +22 among other specifications — note that +22 is not the factory GT-R offset, it is 8 mm more aggressive. That is intentional, and it is the number most people actually want on a modernised car, but it is not a stock replacement.
The LM GT4 in bronze — a modern production run of the wheel most associated with the R34 GT-R. — via @@trust_kikaku_en
Section 4: The 25GT-t Type M
The ER34 25GT-t is the R34 most people actually buy, and its 7.5Jx17 ET40 is a genuinely useful starting point: a proper 17-inch wheel on a narrow-body car, with enough offset headroom to go two sizes wider without touching the bodywork.
Common upgrades:
- 18×9 ET30–ET35 — the sensible modern fitment. 235/40R18 or 245/40R18. No arch work on a car at stock ride height.
- 18×9.5 ET22 rear — staggered street setup. Expect a fender roll and a degree or two of camber at the rear.
- 17×9 ET25 — keeps the smaller diameter for tyre budget and sidewall compliance.
Below ET20 on a narrow-body R34 you are into over-fender territory. The GT-R’s arches are not interchangeable in any practical sense.
Section 5: What Fits From Elsewhere
- R32 GT-R / R33 GT-R: 5×114.3 / 66.1 mm / ET30. Direct swap in both directions, subject to brake clearance — the BNR34’s Brembo package needs 18 inches. See our R33 guide and R32 guide.
- S15 Silvia: 5×114.3 / 66.1 mm, ET40–45. Fits any R34, sits conservatively. See our S15 guide.
- Z32 300ZX / 350Z: 5×114.3 / 66.1 mm. Fits.
- Toyota, Mitsubishi, Mazda 5×114.3 cars: wrong hub bore in every case. 60.1 mm Toyota wheels will not go on at all; 67.1 mm Evo and RX-7 FD wheels need hub-centric rings.
Section 6: Brake Clearance on the BNR34
The GT-R runs Brembo four-piston front calipers on 324 mm discs. In practice that means 18 inches is the working minimum, and 17-inch wheels only fit specific track-oriented designs with a deliberately clear inner barrel. If you are shopping 17s for a BNR34, confirm caliper clearance for the exact model — not just the size.
Related Fitment Guides
- Nissan Skyline R33 — the previous GT-R
- Nissan GT-R R35 — the successor
- Nissan Z (RZ34) — Nissan’s current fitment
- Nissan Silvia S15 — a direct wheel swap
Every guide in this series is built the same way: verified factory specifications, an offset diagram, and an honest account of what fits and what does not.
Buying Wheels for Your R34
The R34 removes the bolt-pattern trap that defines the R32 and R33, which leaves four numbers: diameter, width, offset and — on a GT-R — brake clearance. Get those and you have one of the most straightforward cars in Japan to fit wheels to.
Looking for a specific set? We specialise in genuine Japanese wheels — RAYS, Volk, Enkei, SSR, WORK, BBS Japan and the rare discontinued sets that never left the country. Tell us the wheel, the fitment, the year — our team searches our networks until we find it.
Specifications in this guide reflect factory equipment for Japanese-market vehicles. Trim levels, optional wheel packages and market-specific variants can differ. Always confirm the fitment against your own car before purchase.