Is it acceptable for a car's front wheels to be one size larger than the rear wheels?

[LeEleanor]

It is not acceptable for a car's front wheels to be one size larger than the rear wheels. Here are the relevant explanations: Reasons why front wheels cannot be one size larger than rear wheels: Uneven friction distribution between front and rear wheels will lead to increased fuel consumption. The vehicle will fail relevant annual inspections. Automotive wheel regulations: The total lateral runout and radial runout of wheel assemblies should not exceed 5mm for vehicles with total mass ≤3500kg. The length of tread wear or sidewall damage must not exceed 25mm in length or depth, as this may cause abnormal wear and deformation. Special school buses must use tubeless radial tires; highway coaches, tour buses and school buses must use retreaded tires for all wheels and undergo regular inspections.