18×9.5″ BBS RG-R Wheels for Nissan Skyline
BBS RG-R is a premier choice for the Nissan Skyline GT-R (R32, R33, R34) due to its one-piece die-forged monoblock construction. This process creates an incredibly high stiffness-to-weight ratio, which improves handling response and reduces unsprung mass.
Listing Details
- Set of Four BBS 18″ Wheels
- Forged Alloy Construction
- Silver Finish
- Manufactured by BBS in Japan
- Red BBS Center Caps
- 4x RG708 18×9.5″ ET20
For a Skyline, the 18×9.5″ size is the ideal “square” setup. It fills the flared arches of the GT-R while maintaining the balanced grip levels required for the ATTESA E-TS all-wheel-drive system.
1. Key Performance Specifications
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Construction: One-piece die-forged 6000-series aluminum.
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Weight: Approximately 18.9 lbs (8.6 kg) to 20.6 lbs per wheel, depending on the offset.
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Bolt Pattern: $5\times114.3$ mm (standard for Skylines).
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Hub Bore: Features the BBS PFS (Precision Fitment System), using hub-centric rings to match the Nissan $66.1$ mm hub perfectly.
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Load Rating: Optimized using FEM analysis to ensure high durability under spirited driving.
2. Fitment Guide by Skyline Model
Fitment is primarily determined by the offset (ET). Two specific BBS RG-R part numbers are commonly used for the Skyline platform:
| Offset | Part Number | Fitment Profile |
| ET20 | RG708 | “Flush” Spec: The gold standard for R33 and R34 GT-Rs. It pushes the wheel out to sit flush with the fenders. |
| ET38 | RG701 | “Conservative” Spec: Better suited for the R32 GT-R or for owners who want to avoid any fender rolling/modifications. |
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R34 GT-R: The ET20 offset is a direct bolt-on. It clears the factory gold Brembo calipers easily and typically runs a 265/35R18 tire for a meaty, functional look.
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R33 GT-R: Also fits the ET20 perfectly. This setup fills the R33’s wide arches without the need for spacers.
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R32 GT-R: The ET20 is aggressive and may require fender rolling or slight camber adjustment if the car is lowered. The ET38 is the safer “no-mod” choice but sits slightly further inside the wheel well.
3. Comparison: RG-R vs. Other BBS Forged Wheels
If you are deciding between the RG-R and other iconic BBS options, here is how they stack up for a Skyline build:
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