2025 Alpina B3 Bolt Pattern & Tire Size
The 2025 Alpina B3 OEM tire size, bolt pattern, and wheel specifications are listed below. All data is based on industry-standard OEM reference specifications.
The 2025 Alpina B3 has a 5x112 bolt pattern, an OEM tire size of 255/35R20, and a 66.6mm center bore.
2025 Alpina B3 Engine & Trim Levels
Detailed tire and wheel breakdown for the 2025 Alpina B3
Tire geometry â 255/35R20
The 255/35R20 fitted to the 2025 Alpina B3 has a section width of 255mm and an aspect ratio of 35%, mounted on a 20-inch rim. That gives a sidewall height of 89.3mm (3.51") and an overall outside diameter of 686.5mm (27.03"). At highway speed this tire completes roughly 464 revolutions per kilometre, which is what your speedometer and odometer are calibrated against.
Plus-sizing window
If you want to upsize wheels on the 2025 Alpina B3 while keeping the speedometer accurate, target a 265/29R21 (plus-one). For a softer ride or winter setup, a 245/42R19 (minus-one) keeps the overall diameter within Âą3% of stock, which is the industry tolerance for ABS and stability control to stay calibrated.
Wheel fitment specs
The 2025 Alpina B3 uses a 5x112 bolt pattern with a 66.6mm hub bore. Safe rim width range for the OEM tire is 8.0J â 9.0J, and offsets in the ET20 â ET30 window will clear suspension and fender without rubbing on most setups.
Staggered setup notes
The 2025 Alpina B3 ships staggered: 255/35R20 up front and 265/35R20 on the rear. That is a 265mm vs 255mm width difference â do not rotate front-to-rear, and replace tires in axle pairs to keep ABS and traction control balanced.
Tire pressure guidance
Manufacturer-recommended cold tire pressure for the 2025 Alpina B3 is printed on the driver-side door jamb sticker â 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
| Engine & Trim | Tire Size | Rim Size | Offset (ET) | |
|---|---|---|---|---|
| Biturbo Sedan AWD | Rear: 265/35R20 | 20x8.5J | ET25 | |
| Biturbo Touring AWD | Rear: 265/35R20 | 20x8.5J | ET25 |
Frequently Asked Questions
What tire size does the 2025 Alpina B3 Biturbo Sedan AWD use?
The 2025 Alpina B3 Biturbo Sedan AWD uses 255/35R20 tires as standard equipment.
What tire size does the 2025 Alpina B3 Biturbo Touring AWD use?
The 2025 Alpina B3 Biturbo Touring AWD uses 255/35R20 tires as standard equipment.
What is the bolt pattern of the 2025 Alpina B3?
The 2025 Alpina B3 has a 5x112 bolt pattern with a center bore of 66.6mm.
What is the wheel offset of the 2025 Alpina B3?
The 2025 Alpina B3 has a wheel offset of ET25.
Other Vehicles with 5x112 Bolt Pattern
The following vehicles share the same 5x112 bolt pattern as the 2025 Alpina B3, making wheel interchangeability possible (verify offset and center bore before swapping).