2025 Aito M9 Flagship EV / EREV
The 2025 Aito M9 Flagship EV / EREV tire size and wheel specifications below reflect standard OEM reference fitment data for this trim level.
Detailed tire and wheel breakdown for the 2025 Aito M9
Tire geometry â 265/45R21
The 265/45R21 fitted to the 2025 Aito M9 has a section width of 265mm and an aspect ratio of 45%, mounted on a 21-inch rim. That gives a sidewall height of 119.3mm (4.69") and an overall outside diameter of 771.9mm (30.39"). At highway speed this tire completes roughly 412 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 Aito M9 while keeping the speedometer accurate, target a 275/39R22 (plus-one). For a softer ride or winter setup, a 255/52R20 (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 Aito M9 uses a 5x114.3 bolt pattern with a 60.1mm hub bore. Safe rim width range for the OEM tire is 8.5J â 9.5J, and offsets in the ET35 â ET45 window will clear suspension and fender without rubbing on most setups.
Staggered setup notes
The 2025 Aito M9 ships staggered: 265/45R21 up front and 285/45R21 on the rear. That is a 285mm vs 265mm 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 Aito M9 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%.
Fitment Specifications
| Engine & Trim | Tire Size | Rim Size | Offset (ET) |
|---|---|---|---|
| Flagship EV / EREV | 265/45R21 Rear: 285/45R21 | 21" x 9.0 | ET40 |
Frequently Asked Questions
What tire size does the 2025 Aito M9 Flagship EV / EREV use?
The 2025 Aito M9 Flagship EV / EREV uses 265/45R21 tires as standard equipment.
What is the bolt pattern of the 2025 Aito M9 Flagship EV / EREV?
The 2025 Aito M9 Flagship EV / EREV has a 5x114.3 bolt pattern with a center bore of 60.1mm.
What is the wheel offset of the 2025 Aito M9 Flagship EV / EREV?
The 2025 Aito M9 Flagship EV / EREV has a wheel offset of ETET40.