155 | 
                        
                             Section Width : Tyre width in mm  | 
                    
                            70 | 
                        
                             Aspect Ratio : Sidewall height as a percentage of section width  | 
                    
                            13 | 
                        
                             Wheel diameter : Tyre diameter in inches  | 
                    
Section Width | 
                                Aspect Ratio | 
                                Wheel diameter | 
                                |||
                                    155 | 
                                / | 
                                    70 | 
                                R | 
                                    13 | 
                                V |