WHAT DO EACH NUMBER ON TIRE SIZE STAND FOR
The first number stands for the height, the second stands for the width and the last stands for the tire rim size. In a 235/85/16 the 235 is the height in millimeters. The 85 is the width in millimeters and the 16 is in inches. There is another type of sizing, 31/10.5/15 that means that the tire is 31 inches tall 10.5 inches wide and 15 inch rim.
Height, width and rim/wheel size. Example 33-12.50-R15LT = 33 tall, 12.50 wide on a 15 wheel. LT = light truck.
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205 = Tyre width, this is the width of the tyre measured from bead to bead in mm. This is also known as section width, this is the width of an inflated tyre not including lettering or decoration on the side wall. 55 = Aspect ratio, the aspect ratio also known as profile is the height of the side wall in a term of percentage. So therefore a tyre with the aspect ratio/ profile of 55 is a tyre who height is 55% of its width. 16 = Wheel diameter, 16” would be the wheel diameter that the tyre has been made to fit and is measured in inches. 91 = Load index 91 is a number that equates to a load index which is what weight the tyre can carry. It is important to choose the same load rating or go higher please see table for weights. V = Alphabetical code for speed In this instance the v means the tyre is rated to travel at speeds of upto 149mph/240kmh. Again when choosing new tyres the speed symbol must be the same or higher please see the table for speeds.
