From turbinecar.com
The chart below is for conversion of one type of size series with original inch sizes from the 60's and 70's. This is for as close to a direct replacement for each size but is not endorsed by any safety group or manufacturer of tires or automobiles. You should always use the proper size tire but when an older car size is no longer produced, this might help. Please consult your tire dealer before you make any decisions if you are in doubt as to if you should use a certain size tire.
TIRE SIZE COMPARISON
| | | | | | |
"Letter" Size
| Inch Size
| Metric-inch Size
| | | | |
"60 Series"
| "70 Series"
| "78 Series"
| 1965-77
| "60 Series"
| "70 Series"
| "80 Series"
|
|
|
| 5.50-12, 5.60-12
| 165/60-12
| 165/70-12
| 155/80-12
|
|
| Y78-12
| 6.00-12
|
|
|
|
|
| W78-13
| 5.20-13
| 165/60-13
| 145/70-13
| 135/80-13
|
|
| Y78-13
| 5.60-13
| 175/60-13
| 155/70-13
| 145/80-13
|
|
|
| 6.15-13
| 185/60-13
| 165/60-13
| 155/80-13
|
A60-13
| A70-13
| A78-13
| 6.40-13
| 195/60-13
| 175/70-13
| 165/80-13
|
B60-13
| B70-13
| B78-13
| 6.70-13
| 205/60-13
| 185/70-13
| 175/80-13
|
|
|
| 6.90-13
|
|
|
|
C60-13
| C70-13
| C78-13
| 7.00-13
| 215/60-13
| 195/70-13
| 185/80-13
|
D60-13
| D70-13
| D78-13
| 7.25-13
|
|
|
|
E60-13
| E70-13
| E78-13
| 7.75.13
|
|
| 195/80-13
|
|
|
| 5.20-14
| 165/60-14
| 145/70-14
| 135/80-14
|
|
|
| 5.60-14
| 175/60-14
| 155/70-14
| 145/80-14
|
|
|
| 5.90-14
|
|
|
|
A60-14
| A70-14
| A78-14
| 6.15-14
| 185/60-14
| 165/70-14
| 155/80-14
|
| B70-14
| B78-14
| 6.45-14
| 195/60-14
| 175/70-14
| 165/80-14
|
| C70-14
| C78-14
| 6.95-14
| 205/60-14
| 185/70-14
| 175/80-14
|
D60-14
| D70-14
| D78-14
|
|
|
|
|
E60-14
| E70-14
| E78-14
| 7.35-14
| 215/60-13
| 195/70-14
| 185/80-14
|
F60-14
| F70-14
| F78-14, F83-14
| 7.75-14
| 225/60-14
| 200/70-14
| 195/80-14
|
G60-14
| G70-14
| G77-14, G78-14
| 8.25-14
| 235/60-14
| 205/70-14
| 205/80-14
|
H60-14
| H70-14
| H78-14
| 8.55-14
| 245/60-14
| 215/70-14
| 215/80-14
|
J60-14
| J70-14
| J78-14
| 8.85-14
| 255/60-14
| 225/70-14
| 225/80-14
|
L60-14
| L70-14
|
| 9.15-14
| 265/60-14
| 235/70-14
|
|
| A70-15
| A78-15
| 5.60-15
| 185/60-15
| 165/70-15
| 155/80-15
|
B60-15
| B70-15
| B78-15
| 6.35-15
| 195/60-15
| 175/70-15
| 165/80-15
|
C60-15
| C70-15
| C78-15
| 6.85-15
| 205/60-15
| 185/70-15
| 175/80-15
|
| D70-15
| D78-15
|
|
|
|
|
E60-15
| E70-15
| E78-15
| 7.35-15
| 215/60-15
| 195/70-15
| 185/80-15
|
F60-15
| F70-15
| F78-15
| 7.75-15
| 225/60-15
| 205/70-15
| 195/80-15
|
G60-15
| G70-15
| G78-15
| 8.15-15, 8.25-15
| 235/60-15
| 215/70-15
| 205/80-15
|
H60-15
| H70-15
| H78-15
| 8.45-15, 8.55-15
| 245/60-15
| 225/70-15
| 215/80-15
|
J60-15
| J70-15
| J78-15
| 8.85-15, 8.90-15
| 255/60-15
| 235/70-15
| 225/80-15
|
| K70-15
|
| 9.00-15
| 265/60-15
| 245/70-15
| 230/80-15
|
L60-15
| L70-15
| L78-15, L84-15
| 9.15-15
|
|
| 235/80-15
|
| M70-15
| M78-15
|
|
|
| 255/80-15
|
|
| N78-15
|
|
|
|
|
Here is another chart that may be easier to read - they are not exactly the same so use this as a starting point.
Note: Every size tire is not listed and many size comparisons are approximate, based on load ratings. Wider tires than those supplied new with the vehicle, should always be checked for clearance.
[h=1]Tire Size Charts[/h]
[h=4]75-series 14" Radial Tires[/h]
Description
| Tread width
| Overall diameter
| Rev / mile
| Rim Width
|
| | | | |
185-75R14
| 4.8
| 24.9
| 809
|
|
195-75R14
| 5.1
| 25.5
| 790
|
|
205-75R14
| 5.3
| 26.1
| 773
|
|
215-75R14
| 5.6
| 26.7
| 755
|
|
225-75R14
| 5.9
| 27.3
| 739
|
|
235-75R14
| 6.1
| 27.9
| 723
|
|
[h=4]70-series 14" Radial Tires[/h]
Description
| Tread width
| Overall diameter
| Rev / mile
| Rim Width
|
| | | | |
165-70R14
| 4.6
| 23.1
| 873
|
|
175-70R14
| 4.9
| 23.6
| 853
|
|
185-70R14
| 5.2
| 24.2
| 834
|
|
195-70R14
| 5.5
| 24.7
| 815
|
|
205-70R14
| 5.8
| 25.3
| 797
|
|
215-70R14
| 6.0
| 25.9
| 780
|
|
225-70R14
| 6.3
| 26.4
| 764
|
|
235-70R14
| 6.6
| 27.0
| 748
|
|
[h=4]60-series 14" Radial Tires[/h]
Description
| Tread width
| Overall diameter
| Rev / mile
| Rim Width
|
| | | | |
165-60R14
| 5.2
| 21.8
| 925
|
|
175-60R14
| 5.5
| 22.3
| 906
|
|
185-60R14
| 5.8
| 22.7
| 887
|
|
195-60R14
| 6.1
| 23.2
| 869
|
|
205-60R14
| 6.5
| 23.7
| 852
|
|
215-60R14
| 6.8
| 24.2
| 835
|
|
225-60R14
| 7.1
| 24.6
| 819
|
|
235-60R14
| 7.4
| 25.1
| 803
|
|
[h=4]75-series 15" Radial Tires[/h]
Description
| Tread width
| Overall diameter
| Rev / mile
| Rim Width
|
| | | | |
135-75R15
| 3.5
| 23.0
| 878
|
|
145-75R15
| 3.8
| 23.6
| 856
|
|
155-75R15
| 4.0
| 24.2
| 835
|
|
165-75R15
| 4.3
| 24.7
| 815
|
|
185-75R15
| 4.8
| 25.9
| 778
|
|
195-75R15
| 5.1
| 26.5
| 761
|
|
205-75R15
| 5.3
| 27.1
| 744
|
|
215-75R15
| 5.6
| 27.7
| 728
|
|
225-75R15
| 5.9
| 28.3
| 713
|
|
235-75R15
| 6.1
| 28.9
| 698
|
|
[h=4]70-series 15" Radial Tires[/h]
Description
| Tread width
| Overall diameter
| Rev / mile
| Rim Width
|
| | | | |
185-70R15
| 5.2
| 25.2
| 800
|
|
195-70R15
| 5.5
| 25.7
| 783
|
|
205-70R15
| 5.8
| 26.3
| 767
|
|
215-70R15
| 6.0
| 26.9
| 751
|
|
225-70R15
| 6.3
| 27.4
| 736
|
|
235-70R15
| 6.6
| 28.0
| 722
|
|
255-70R15
| 7.2
| 29.1
| 694
|
|
[h=4]60-series 15" Radial Tires[/h]
Description
| Tread width
| Overall diameter
| Rev / mile
| Rim Width
|
| | | | |
185-60R15
| 5.8
| 23.7
| 850
|
|
195-60R15
| 6.1
| 24.2
| 833
|
|
205-60R15
| 6.5
| 24.7
| 817
|
|
215-60R15
| 6.8
| 25.2
| 802
|
|
225-60R15
| 7.1
| 25.6
| 787
|
|
235-60R15
| 7.4
| 26.1
| 773
|
|
245-60R15
| 7.7
| 26.6
| 759
|
|
255-60R15
| 8.0
| 27.0
| 746
|
|
275-60R15
| 8.7
| 28.0
| 720
|
|
[h=4]50-series 15" Radial Tires[/h]
Description
| Tread width
| Overall diameter
| Rev / mile
| Rim Width
|
| | | | |
205-50R15
| 7.0
| 23.1
| 874
|
|
225-50R15
| 7.7
| 23.9
| 845
|
|
[h=4]78-series 14" Bias Ply Tires[/h]
Description
| Overall diameter
| Rev / mile
| Design Rim Width
|
| | | |
A78-14
| 24.2
| 835
| 4.5
|
B78-14
| 24.7
| 817
| 4.5
|
C78-14
| 25.2
| 799
| 5.0
|
D78-14
| 25.5
| 791
| 5.0
|
E78-14
| 26.0
| 776
| 5.5
|
F78-14
| 26.5
| 761
| 5.5
|
G78-14
| 27.1
| 745
| 6.0
|
H78-14
| 27.8
| 727
| 6.0
|
J78-14
| 28.2
| 715
| 6.0
|
[h=4]70-series 14" Bias Ply Tires[/h]
Description
| Overall diameter
| Rev / mile
| Design Rim Width
|
| | | |
E70-14
| 25.8
| 783
| 5.5
|
F70-14
| 26.2
| 769
| 5.5
|
G70-14
| 26.8
| 752
| 6.0
|
H70-14
| 27.5
| 733
| 6.0
|
[h=4]60-series 14" Bias Ply Tires[/h]
Description
| Overall diameter
| Rev / mile
| Design Rim Width
|
| | | |
E60-14
| 24.8
| 814
| 6.5
|
F60-14
| 25.3
| 798
| 7.0
|
G60-14
| 25.8
| 782
| 7.0
|
H60-14
| 26.4
| 764
| 7.0
|
[h=4]78-series 15" Bias Ply Tires[/h]
Description
| Overall diameter
| Rev / mile
| Design Rim Width
|
| | | |
A78-15
| 24.8
| 813
| 4.5
|
B78-15
| 25.4
| 795
| 4.5
|
C78-15
| 25.8
| 781
| 5.0
|
D78-15
| 26.2
| 769
| 5.0
|
E78-15
| 26.6
| 757
| 5.0
|
F78-15
| 27.2
| 741
| 5.5
|
G78-15
| 27.7
| 729
| 5.5
|
H78-15
| 28.4
| 711
| 6.0
|
J78-15
| 28.7
| 702
| 6.0
|
L78-15
| 29.3
| 688
| 6.0
|
[h=4]70-series 15" Bias Ply Tires[/h]
Description
| Overall diameter
| Rev / mile
| Design Rim Width
|
| | | |
E70-15
| 26.4
| 764
| 6.0
|
F70-15
| 26.9
| 749
| 6.0
|
G70-15
| 27.5
| 734
| 6.0
|
H70-15
| 28.1
| 718
| 6.0
|
J70-15
| 28.4
| 709
| 6.5
|
L70-15
| 28.9
| 697
| 6.5
|
[h=4]60-series 15" Bias Ply Tires[/h]
Description
| Overall diameter
| Rev / mile
| Design Rim Width
|
| | | |
E60-15
| 25.5
| 791
| 6.0
|
F60-15
| 25.9
| 777
| 6.5
|
G60-15
| 26.4
| 763
| 7.0
|
H60-15
| 27.1
| 745
| 7.0
|
J60-15
| 27.4
| 736
| 7.0
|
L60-15
| 27.9
| 724
| 7.0
|
Vintage Tire Size Conversion Chart
Use the following chart to figure out the closest modern tire size to your car's original tires. Keep in mind these are close approximations and may not be exact replacements. Before purchasing any tires you should compare outside diameters and the tread footprint to get a better idea on how close a match they are. Your local tire dealer should have this information. Variations in tire diameter will have an effect on speedometer accuracy while the tread footprint will have an aesthetic affect on the appearance of the car. The best way to ensure a 100% correct look for your antique car is to buy reproduction vintage tires in the originally recommended size.
Pre-1964
| 1965-72
| 80 series metric
| Alpha Numeric 78 series
| P-Metric 75 series Radial
| P-Metric 70 series Radial
|
5.90-13
| 600-13
| 165-13
| A78-13
| P165/75R13
| P175/70R13
|
6.40-13
| 650-13
| 175-13
| B78-13
| P175/75R13
| P185/70R13
|
7.25-13
| 700-13
| 185-13
| D78-13
| P185/75R13
| P205/70R13
|
5.90-14
| 645-14
| 155-14
| B78-14
| P175/75R14
| P185/70R14
|
6.50-14
| 695-14
| 175-14
| C78-14
| P185/75R14
| P195/70R14
|
7.00-14
| 735-14
| 185-14
| E78-14
| P195/75R14
| P205/70R14
|
7.50-14
| 775-14
| 195-14
| F78-14
| P205/75R14
| P215/70R14
|
8.00-14
| 825-14
| 205-14
| G78-14
| P215/75R14
| P225/70R14
|
8.50-14
| 855-14
| 215-14
| H78-14
| P225/75R14
| P235/70R14
|
5.90-15
| 600-15
| 165-15
| A78-15
| P165/75R15
| P175/70R15
|
6.50-15
| 685-15
| 175-15
| C78-15
| P175/75R15
| P185/70R15
|
6.40-15
| 735-15
| 185-15
| E78-15
| P195/75R15
| P205/70R15
|
6.70-15
| 775-15
| 195-15
| F78-15
| P205/75R15
| P215/70R15
|
7.10-15
| 825-15
| 205-15
| G78-15
| P215/75R15
| P225/70R15
|
7.60-15
| 855-15
| 215-15
| H78-15
| P225/75R15
| P235/70R15
|
8.00-15
| 885-15
| 230-15
| J78-15
| P225/75R15
| P235/70R15
|
8.20-15
| 900-15
| 235-15
| L78-15
| P235/75R15
| P255/70R15
|
Rim/Wheel Widths
Each tire has a specific rim width range on which the tire can be mounted. Failure to follow rim width recommendations may result in poor tire performance or possible wheel and/or tire failure.
Below is a quick reference chart listing each tire size and the acceptable rim widths for that size. (The chart does not show all sizes, but gives a good example) Choosing a wheel near the middle of the range will give a balance between ride quality and handling. A wider wheel will improve handling at the expense of ride quality, while a narrower wheel will improve ride quality at the expense of handling. Consider these compromises when selecting wheels.
Metric Rim Widths
Aspect Ratio
| Metric Size Designations
| Approved RimWidth Ranges
| 35 Series
| 275/35R17
| 9.0-10.5
|
| 335/35R17
| 11.0-13.0
|
| 345/35R15
| 11.0-13.5
| 40 Series
| 285/40R15
| 11.0-13.5
|
| 215/40R15
| 7.0-8.5
|
| 245/40R17
| 8.0-9.5
|
| 255/40R17
| 8.5-10.0
|
| 265/40R17
| 8.5-10.0
|
| 235/40R18
| 8.0-9.5
| 45 Series
| 195/40R15
| 6.5-7.5
|
| 215/45R15
| 7.0-8.5
|
| 255/45R15
| 8.5-10.0
|
| 205/45R16
| 7.0
|
| 225/45R16
| 7.5-9.0
|
| 245/45R16
| 8.0-9.5
|
| 215/45R17
| 7.0-8.5
|
| 235/45R17
| 8.0-9.5
|
| 255/45R17
| 8.5-10.5
| 50 Series
| 175/50R13
| 5.0-6.0
|
| 195/50R14
| 5.5-7.0
|
| 205/50R15
| 5.5-7.5
|
| 215/50R15
| 6.0-7.5
|
| 225/50R15
| 6.0-8.0
|
| 195/50R16
| 5.5-7.0
|
| 205/50R16
| 5.5-7.5
|
| 225/50R16
| 6.0-8.0
|
| 235/50R16
| 6.5-8.5
|
| 215/50R17
| 6.5-7.5
| 55 Series
| 205/55R14
| 5.5-7.5
|
| 185/55R15
| 6.0-6.5
|
| 195/55R15
| 5.5-7.0
|
| 205/55R15
| 5.5-7.5
|
| 205/55R16
| 5.5-7.5
|
| 225/55R16
| 6.0-8.0
|
|
Aspect Ratio
| Metric Size Designations
| Approved RimWidth Ranges
| 60 Series
| 185/60R13
| 5.0-6.5
|
| 205/60R13
| 5.5-7.5
|
| 185/60R14
| 5.0-6.5
|
| 195/60R14
| 5.5-7.0
|
| 205/60R14
|
|
| 195/60R15
| 5.5-7.0
|
| 205/60R15
| 5.5-7.5
|
| 215/60R15
| 6.0-7.5
|
| 225/60R15
| 6.0-8.0
|
| 235/60R15
| 6.5-8.5
| 65 Series
| 185/65R15
| 5.0-6.5
|
| 195/65R15
| 5.5-7.0
|
| 205/65R15
| 5.5-7.5
|
| 215/65R15
| 6.0-7.5
| 70 Series
| 165/70R10
| 4.5-5.5
|
| 175/70R12
| 5.0-6.0
|
| 175/70R13
| 5.0-6.0
|
| 185/70R13
| 5.0-6.5
|
| 185/70R14
| 5.0-6.5
|
| 195/70R14
| 5.5-7.0
|
| 205/70R14
| 5.5-7.5
|
| 185/70R15
| 5.0-6.5
|
| 205/70R15
| 5.5-7.5
|
| 215/70R15
| 6.0-7.5
| 82 Series
| 155R12
| 4.0-5.0
|
| 155R13
| 4.0-5.5
|
| 165/70R13
| 4.0-5.5
|
| 175R14
| 4.5-6.0
|
| 185R14
| 4.5-6.0
|
| 165R15
| 4.0-5.5
|
|
P-Metric Rim Width
Aspect Ratio
| Metric
Size
Designations
| Approved
Rim Width
Ranges
| 75 Series
| P205/75R15
| 5.5-7.5
|
| P215/75R15
| 5.5-7.5
|
| P225/75R15
| 6.0-8.0
|
| P235/75R15
| 6.0-8.0
| 80 Series
| P155/80R13
| 4.5-5.5
|
| P165/80R13
| 4.5-6.0
|
| P175/80R13
| 4.5-6.0
|
| P185/80R13
| 5.0-6.5
|
|
Aspect Ratio
| Metric
Size
Designations
| Approved
Rim Width
Ranges
| 35 Series
| P315/35R17
| 10.0-12.0
| 40 Series
| P275/40R17
| 8.5-10.0
| 50 Series
| P215/50R13
| 5.5-8.5
|
| P235/50R13
| 6.0-9.0
|
| P245/50R14
| 6.5-9.0
|
| P225/50R15
| 6.0-8.0
|
| P295/50R15
| 7.5-11.0
|
| P225/50R16
| 6.0-8.0
|
| P245/50R16
| 6.5-9.5
|
|
OLD TIRE DIMENSIONS
All Dimensions Are Approximate - Street Tire Sizes
Size
| Diameter
| Cross Section
|
| Size
| Diameter
| Cross Section
|
5.20-10
| 19.90
| 5.55
|
| 155HR15
| 24.80
| 6.10
|
5.50-12
| 21.90
| 5.50
|
| 175/70HR15
| 24.85
| 6.90
|
155HR13
| 22.80
| 6.50
|
| 180HR15
| 26.80
| 6.90
|
185HR13
| 25.00
| 7.10
|
| 185/70R15
| 25.71
| 7.30
|
5.20-13
| 22.80
| 5.65
|
| 400/425-15
| 23.00
| 4.70
|
5.60-13
| 23.70
| 5.90
|
| 5.00-15
| 24.40
| 4.75
|
5.90-13
| 24.10
| 6.60
|
| 5.60-15
| 25.90
| 4.38
|
6.00-13
| 23.70
| 6.20
|
| 5.90-15
| 25.40
| 5.90
|
6.40-13
| 25.10
| 6.60
|
| 6.40-15
| 26.90
| 6.25
|
6.50-13
| 24.70
| 6.70
|
| 6.70-15
| 27.40
| 7.00
|
7.00-13
| 25.70
| 7.10
|
| 7.00-15
| 29.20
| 7.35
|
7.25X13
| 25.70
| 7.10
|
| 7.10-15
| 28.00
| 7.40
|
6.70/7.25-13
| 25.70
| 7.40
|
| 7.75-15
| 27.40
| 7.70
|
7.50-13
| 25.80
| 7.60
|
| 7.60-15
| 28.70
| 7.90
|
D70-14
| 25.32
| 7.85
|
| 8.00-15
| 29.08
| 8.30
|
E70-14
| 25.76
| 8.05
|
| 8.15-15
| 28.66
| 7.90
|
F70-14
| 26.24
| 8.30
|
| 8.20-15
| 29.60
| 8.50
|
G70-14
| 26.82
| 8.75
|
| 890-15
| 31.00
| 9.30
|
205VR14
| 26.80
| 8.10
|
| 185X16
| 27.90
| 7.10
|
5.20-14
| 24.20
| 5.40
|
| 475/500-16
| 24.13
| 3.94
|
5.90-14
| 25.30
| 6.10
|
| 500/525-16
| 26.80
| 5.00
|
6.95-14
| 25.90
| 7.00
|
| 5.50-16
| 26.90
| 5.25
|
7.00-14
| 26.50
| 7.00
|
| 6.00-16
| 26.36
| 6.25
|
7.50-14
| 27.30
| 7.40
|
| 6.50-16
| 29.30
| 6.80
|
7.75-14
| 26.70
| 7.75
|
| 7.50-16
| 31.45
| 8.20
|
8.00-14
| 27.60
| 8.10
|
| 8.25-16
| 32.45
| 8.80
|
8.25-14
| 25.80
| 8.05
|
| 4.50-17
| 25.35
| 4.70
|
8.50-14
| 28.10
| 8.35
|
| 5.50-17
| 28.13
| 5.25
|
9.00-14
| 28.70
| 8.80
|
| 7.00-17
| 31.12
| 7.38
|
F70-15
| 26.94
| 8.35
|
| 7.50-17
| 31.75
| 8.00
|
F60-15
| 25.94
| 9.20
|
|
|
|
|
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Page up-dated 11-12-2008
