2021 Ginetta G40 Bolt Pattern & Tire Size
The 2021 Ginetta G40 OEM tire size, bolt pattern, and wheel specifications are listed below. All data is based on industry-standard OEM reference specifications.
The 2021 Ginetta G40 has a 4x108 bolt pattern, an OEM tire size of 195/50R15, and a 63.4mm center bore.
Other years of the Ginetta G40
2021 Ginetta G40 Engine & Trim Levels
Detailed tire and wheel breakdown for the 2021 Ginetta G40
Tire geometry — 195/50R15
The 195/50R15 fitted to the 2021 Ginetta G40 has a section width of 195mm and an aspect ratio of 50%, mounted on a 15-inch rim. That gives a sidewall height of 97.5mm (3.84") and an overall outside diameter of 576.0mm (22.68"). At highway speed this tire completes roughly 553 revolutions per kilometre, which is what your speedometer and odometer are calibrated against.
Plus-sizing window
If you want to upsize wheels on the 2021 Ginetta G40 while keeping the speedometer accurate, target a 205/41R16 (plus-one). For a softer ride or winter setup, a 185/60R14 (minus-one) keeps the overall diameter within ±3% of stock, which is the industry tolerance for ABS and stability control to stay calibrated.
Wheel fitment specs
The 2021 Ginetta G40 uses a 4x108 bolt pattern with a 63.4mm hub bore. Safe rim width range for the OEM tire is 6.5J – 7.5J, and offsets in the ET30 – ET40 window will clear suspension and fender without rubbing on most setups.
Tire pressure guidance
Manufacturer-recommended cold tire pressure for the 2021 Ginetta G40 is printed on the driver-side door jamb sticker — always defer to that value, not to the maximum pressure printed on the tire sidewall. Check pressure monthly and before long trips; under-inflation by 20% can reduce tread life by 25%.
OEM Wheel & Tire Specs
Frequently Asked Questions
What tire size does the 2021 Ginetta G40 GRDC use?
The 2021 Ginetta G40 GRDC uses 195/50R15 tires as standard equipment.
What is the bolt pattern of the 2021 Ginetta G40?
The 2021 Ginetta G40 has a 4x108 bolt pattern with a center bore of 63.4mm.
What is the wheel offset of the 2021 Ginetta G40?
The 2021 Ginetta G40 has a wheel offset of ET35.
Other Vehicles with 4x108 Bolt Pattern
The following vehicles share the same 4x108 bolt pattern as the 2021 Ginetta G40, making wheel interchangeability possible (verify offset and center bore before swapping).