A vehicle's tyres play a crucial role in the overall design, performance, and handling. A simple process like upsizing the tyres, or getting your car fit with tyres that are one size bigger may add heaps of design benefits.
While upsizing adds to the appeal, it may also affect its performance significantly. Therefore, Vehicle owners may like to consider a number of factors before upsizing their tyres
A car's suspension setup is designed to take a particular tyre size. If the tyre has been upgraded to a size bigger than what the company has recommended, the suspension will not be able to soak up bumps as efficiently compared to a vehicle with the original tyre size. Also, if the wheel wells do not have sufficient space, you would risk the tyre scraping against the vehicle's body.
Similar to gaining better handling, the contact patch goes up as well, since upgrading the size means there's more rubber. Better contact patch also means better braking.