Does recommended tire pressure change with tire size?

Because the weight of your car didn’t change just because you changed to a larger tire. A larger tire needs more air volume, but it doesn’t need higher pressure. Weight of the vehicle and handling are what determines air pressure, not tire size.

Can you put H-rated tires instead of V?

Considerations. To support running at higher speeds, V-rated tires will have a stiffer sidewall and slightly firmer ride than H-rated tires. For normal driving conditions the H-rated tire will provide a more comfortable ride and the V-rated should give slightly better handling.

What is the recommended tire pressure for aftermarket wheels?

Air Pressure for Competition Tires

Type of Vehicle	Position	Pressure
Front Engine/Front or All-Wheel Drive	Front Rear	40-45 psi 30-40 psi
Front Engine/Rear Wheel Drive	Front Rear	35-45 psi 30-40 psi
Mid- or Rear-Engine	Front Rear	35-45 psi 35-40 psi

What does 114h mean on tires?

H (Speed Rating): A speed rating of “H” means that this tire is designed to withstand speeds up to 130 miles per hour. In summary, a P255/45R18 103H tire would be a passenger tire with a width of 255 millimeters, a thickness or aspect ratio equal to 45\% of the tire height which here is 114 millimeters.

Do speed ratings on tires matter?

The speed rating tells you the speed the tire can safely maintain over time. A higher speed rating usually means you will have better control and handling at higher speeds – and that the tire can take the extra heat. As a general rule, tires with higher speed ratings also handle better at slower speeds.

What does 100h mean on tires?

An H speed rating indicates the tire is approved for speeds up to 130 mph (210 km/h) under optimal conditions.

What is the difference between 94h and 94V tires?

V and H are speed ratings. V is rated as safe up to 149mph, but H only up to 130mph.

How much of a difference does tire pressure make?

As you say, tire pressure changes along with the outside temperature. For every change of 10 degrees in the outside temperature, tire pressure changes about 1 psi. So if you fill your tires to 33 psi when it’s 75 degrees out, and it drops to 25 degrees at night, your tires will be at 28 psi.

Should your tires be at max psi?

If there’s no sticker on the door, you can usually find the specs in the owner’s manual. Most passenger cars will recommend 32 psi to 35 psi in the tires when they’re cold. That number is the maximum pressure the tire can hold, not the recommended pressure for the vehicle.