When do you need to know the size of your tires?
You may need to know the size of your tires for various reasons, such as for a spare tire or when purchasing wheels, rims, or snow tires. However, measuring the tire size manually with a tape measure will not give you accurate results. Luckily, your tire size is easy to figure out.
How big does a 17 ” tire need to be?
The final number in your tire size (before the separate load index and speed rating) denotes both tire and wheel size. In the diagram just below, the size is 17 which translates to 17″. This tire is fitted to a 17″ wheel. Determining wheel width is a bit trickier.
How big of a tire do I need for a 9.0 wide wheel?
For example a tire size 35X12.50-20 is typically fitted on a 9.0″ wide wheel, therefore the tire width is 12.5″ with the wheel much narrower than the tread width. For sports cars, the general rule of thumb is to match the wheel width to the tread width in inches. For example a tire size 285/35-19 has a tread width of 9.9″.
Can a Stock tire fit a 19 ” wheel?
If these wheel specifications are kept consistent, then your stock (OE) tires will fit the new rims equally well. If you change rim width or diameter, e.g. moving from an 18″ wheel to a 19″ wheel diameter, then your stock tires will no longer fit the rims. How do I tell wheel size?
What’s the best tire size for me in 2018?
By my best recollection, the standard tire size for road racing, time trials, and triathlons hovered between 21 and 23mm up through about 2012 (give or take). By about 2010, rims with a 17mm internal width started to become fairly common, which add 1-2 millimeters to the labeled tire width.
What do the numbers mean on a tire size?
The first three-digit number in the tire size refers to the tire width. For instance, in a size P215/65 R15 tire, the width is 215 millimeters. Is the ratio of the height of the tire’s cross-section to its width. The two-digit number after the slash mark in a tire size is the aspect ratio.
How big of a tire do I Need?
By about 2010, rims with a 17mm internal width started to become fairly common, which add 1-2 millimeters to the labeled tire width. This mostly got ignored, and we all still went by what the label said.
What is the aspect ratio of a tire?
If the tire size is 255 /60 R16, the width of the tire is 255 millimeters. The two digit number after the slash mark is the aspect ratio which measures the tire’s cross-section to it’s width. If the tire size is 255/ 60 R16, the 60 means that the height is 60% of the tire’s width. The bigger the aspect ratio, the bigger the tire’s sidewall will be.