What do the parts of a tire size mean?
The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire’s width. The bigger the aspect ratio, the bigger the tire’s sidewall will be.
What is the inner metal part of a tire called?
inner liner
On each side of the tire, you will find something called the “bead,” which is made of a mix of wire and rubber materials. The bead connects the tire to the rim and creates a seal, preventing air from escaping. The innermost layer of the tire is the inner liner, whose job is to keep the air inside the tire.
What does 265 mean on a tire?
This code gives you the following information about your vehicle’s tire: P = Passenger Tire (Light Truck Tires will begin with the prefix LT). 265 = Section Width in millimeters (measured at the widest part of the tire from sidewall to sidewall) /60 = Aspect Ratio or section height to width ratio as a percentage.
What does the T or H mean on tires?
The “T” or “H” on tires pertain to their speed ratings. A T-rated tire can withstand top speeds of up to 118 mph (190 km/h), while an H-rated tire can support up to 130 mph (210 km/h).
Can I use 245 tires instead of 235?
The quick answer is yes you can replace 245/50-18 tyres with 235/50-18 but they will have 10mm (0.4 in) smaller overall diameter. Will only slightly effect speedo and odometer – ie speedo will read about 1.5% high.
Can I use 235 tires instead of 225?
Are 225 and 235 Tires Interchangeable? Yes, they are. However, this is only possible if your car’s rims can accept the larger millimeter.
What is the metal part of a tire?
Carcass (Casing) Also called the casing, the carcass is the main component of a tire consisting of wire beads and body plies. The tread or sidewalls are not part of the carcass.
What is the thing that holds the tire called?
wheel
A wheel has an inner and outer rim to hold the tire. The centre hole in the wheel fits over the axle hub, and it’s the part that supports the vehicle’s weight. The smaller holes around it go over the wheel studs.
How is the diameter of a tire measured?
The wheel diameter (the number that indicates tire mounting diameter) is measured at the “fl oor” area where the tire bead seats. Since you may not own a large measuring caliper, here’s an easy method to measure wheel diameter. Wheel overall diameter- bead seat height x 2=rim diameter.
How is the width of a St tire measured?
ST tires should never be used on cars. The tire width is measured from sidewall to sidewall of the tire. It is represented by a three digit number and measured in millimeters. In our example above, the width is 185mm. This is the ratio of the height of the tire’s cross-section to its width.
What are the different types of tire sizes?
Example of Tire Size Specifications. 1 Tire Type. Tire sizes will often start with letters. For example P, LT, T, and ST. 2 Tire Width. 3 Aspect Ratio. 4 Construction Types. 5 Wheel Diameter.
What does a 45 aspect ratio tire look like?
In this example, the 45 indicates that the sidewall distance, from the wheel rim to the outside of the tread, is 45% of the section width. A lower aspect ratio means a lower-profile tire with a shorter sidewall, while a tire with a higher aspect ratio will have a taller sidewall and look more like a donut.