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.
Seen on the road
Which wheels are you looking for? Tell us the wheel, the size and the fitment — send us a request and we will go and find it.
Wheel identification is taken from the hashtags the owner applied to their own post.
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.