How much bigger can I go on tire size?
When changing tire sizes, we recommend staying within 3% of the diameter/height of the original tire. Any more than this and you face the risk of brake failure. The 3% rule states that when replacing tires, the new tire’s diameter should not differ from the original by more than 3%. This guideline helps maintain proper vehicle performance, safety system functionality, and speedometer accuracy.The Rule of 105% The Rule of 105 states that the rim must be at least 105% the width of the tire if you have any chance of re-capturing airflow from the tire and controlling it or smoothing it.
Is 35 or 45 psi better for a tire?
Most passenger cars’ psi requirement will be between 30 to 35 psi, but several vehicles fall outside of that range and every vehicle will have specific requirements. Good tire air pressure ensures that tires wear evenly, provide a smooth ride, and increase fuel efficiency. Small cars like sedans and hatchbacks typically require a tyre pressure between 30 to 35 PSI. This provides adequate road grip and a comfortable drive. Medium-sized vehicles such as SUVs and crossovers usually need a slightly higher tyre pressure, typically between 35 to 40 PSI.