The H/S aspect ratio is approximately equal to 1.00 The section width, given in inches is a whole number Example: 18.00R25 Our size list: 12.00R24, 13.00R25, 14.00R24, 14.00R25, 16.00R25,18.00R25, 18.00R33, 21.00R33, 21.00R35, 24.00R35, 27.00R49, 30.00R51, 33.00R51, 36.00R51, 40.00R57
80 Series ( Wide Base )
The H/S aspect ratio is approximately equal to 0.80 The section width, given in inches is a whole number followed by a fraction Example: 20.5R25= 525/80R25 Our size list: 15.5R25，17.5R25，20.5R25，23.5R25，26.5R25，29.5R25，29.5R29
65 Series (Low Profile Tires )
The H/S aspect ratio is approximately equal to 0.65 The section width, given in millimeters followed by the number 65 Example: 875/65R29 Our size list: 600/65R25，650/65R25，750/65R25， 875/65R29, 35/65R33, 45/65R45
How to Read Tire Sizes?
What does each digital or letter in a tire size mean?
Overall Diameter (OD) “Overall Diameter” is twice the section height of a new tire, plus the nominal rim diameter, including 24-hour inflation growth.
Overall Width (OW) “Overall width” is the width of a new tire, including 24-hour inflation growth, and including protective side ribs, bars or decorations.
Section Width (SW) “Section Width” is the width of a new tire, including 24-hour inflation growth and including normal sidewalls, but nor including protective side ribs, bars, or decorations.
Static Loaded Radius and Width (SLR, SLW) “Static Loaded Radius” is the shortest distance from the axle center to the contact surface of a tire and “Static Loaded Width” is the overall width of a tire, mounted on the approved rim at the specified inflation pressure and placed still and vertically on a flat board, and loaded with the specified load.
Original Tread Depth (OTD) “Original Tread Depth” is the tread depth of a new tire measured at the point of tread-indicator where available or one-fourth the width of the tire crown section from the crown center, including 24-hour inflation growth.
