1.  Tyre Conversion Chart I
2.  Tire Conversion Chart II
 


TYRE SIZE CONVERSION CHART

1949
to
1964		 1965
to
1970		 1970 to 1980 1960 - On 1980 - On
NUMERIC ALPHA NUMERIC* EURO-METRIC P-METRIC EURO-METRIC or P-METRIC 
"90" to "80"
Series		 78 to 50
Series		 "82"
Series		 80, 75
Series		 70
Series		 65
Series		 60
Series		 50
Series
5.20-10 145R10 165/70R10
5.20-12 145R12 P145/80R12 165/70R12
5.60-12 6.00-12 155R12 P155/80R12
165/65R13
145R13
155R13 P155/80R13 175/70R13 195/60R13 215/50R13
5.60-13 6.00-13 A 165R13 P165/80R13 185/70R13 205/60R13
6.50-13 B 175R13 P175/80R13
C P185/80R13
7.00-13 D 185R13
195R13
5.60-14 6.00-14 145R14 175/65R14
6.00-14 6.45-14 155R14 175/70R14 185/65R14
B 165R14 P175/75R14 185/70R14 195/65R14 205/60R14
6.50-14 6.95-14 C 175R14 P185/75R14 195/70R14 215/60R14
D
7.00-14 7.35-14 E 185R14 P195/75R14 205/70R14 225/60R14 245/50R14
7.50-14 7.75-14 F 195R14 P205/75R14 215/70R14 235/60R14
8.00-14 8.25-14 G 205R14 P215/75R14 225/70R14 245/60R14 265/50R14
8.50-14 8.55-14 H 215R14 P225/75R14
9.00-14 J 225R14
9.50-14 L
5.60-15 A 155R15 P155/80R15 185/65R15 195/60R15
6.00-15 B 165R15 P165/80R15 185/70R15 195/65R15 205/60R15 225/50R15
6.50-15 6.85-15 C 175R15 195/70R15 205/65R15 215/60R15
D
7.35-15 E 185R15 P195/75R15 205/70R15 215/65R15 225/60R15
6.70-15 7.75-15 F 195R15 P205/75R15 215/70R15 235/60R15
8.15-15
7.10-15 G 205R15 P215/75R15 225/70R15 235/65R15 245/60R15 265/50R15
8.25-15
8.45-15
7.60-15 H 215R15 P225/75R15 235/70R15 255/60R15 275/50R15
8.55-15
8.00-15 8.85-15 J 225R15 P225/75R15 235/70R15 265/60R15
8.20-15 9.00-15 K
9.15-15 L 235R15 P235/75R15 255/70R15 275/60R15 295/50R15

When replacing Alpha Numeric tires with Euro-metric or P-metric tires, look for the Euro-metric or P-metric size listed in the equivalent aspect ratio. For example, when replacing a FR78-14, you would look up the appropriate 75-series size, the 205/75R14. If replacing a FR70-14, you would look up the appropriate 70-series size, the 215/70R14. If replacing a FR60-14, you would look up the appropriate 60-series size, the 235/60R14.

  • Listing in chart does not imply complete interchangeability. 
  • When changing tire sizes, dimensional clearances must be checked. See HERE

Tire Conversion Chart, Old Sizes To Radial Size

Old Size Letter Size 82 Series 80 Series 75 Series 70 Series 65 Series 60 Series 50 Series
6.00-14   155R14     175/70R14 185/65R14    
6.45-14   155R14     175/70R14 185/65R14    
6.50-14   175R14 185/75R14   195/75R14   215/60R14  
6.95-14   175R14 185/75R14   195/75R14   215/60R14  
7.00-14 E 185R14   195/75R14 205/75R14   225/60R14 245/50R14
7.35-14 E 185R14   195/75R14 205/75R14   225/60R14 245/50R14
7.50-14 F 195R14   205/75R14 215/70R14   235/60R14  
7.75-14 F 195R14   205/75R14 215/70R14   235/60R14  
8.00-14 G 205R14   215/75R14 225/70R14   245/60R14 265/50R14
8.25-14 G 205R14   215/75R14 225/70R14   245/60R14 265/50R14
8.50-14 H 215R14   225/75R14        
8.55-14 H 215R14   225/75R14        
9.00-14 J 225R14            
9.50-14 L              
6.00-15 B 165R15 165/80R15   185/70R15 195/65R15 205/60R15 225/50R15
6.50-15 C 175R15     195/70R15 205/65R15 215/60R15  
6.70-15 F 195R15   205/75R15 215/70R15   235/60R15  
6.85-15 C 175R15     195/70R15 205/65R15 215/60R15  
7.10-15 G 205R15   215/75R15 225/70R15 235/65R15 245/60R15 265/50R15
7.35-15 E 185R15   195/75R15 205/70R15 215/65R15 225/60R15  
7.60-15 H 215R15   225/75R15 235/70R15   255/60R15 275/50R15
7.75-15 F 195R15   205/75R15 215/70R15   235/60R15  
8.00-15 J 225R15   225/75R15 235/70R15   265/60R15  
8.20-15 K              
8.85-15 J 225R15   225/75R15 235/70R15   265/60R15  
9.00-15 K              
9.15-15 L 235R15   235/75R15 255/70R15   275/60R15 295/50R15
9.15-15 N             305/50R15

When changing tire sizes, dimensional clearances must be checked. Click HERE to check