Passenger Tyre Conversion Table & Speed Ratings
Car Radial Interchangeability Guide
To find conversion size options, identify your current fitted tyre size and choose a new tyre
size along the same horizontal line.
Still need help? Contact us.
OD = Overall diameter of the tyre.
Please note:
- The conversion table is a guideline only as not all options are practical.
- Vehicle clearance must be verified for section width and height when considering a wider tyre.
- When considering tyre conversions, correct selection of wheel rims for tyre size/sizes chosen is critical.
| 80 |
OD |
70 |
OD |
65 |
OD |
60 |
OD |
55 |
OD |
50 |
OD |
45 |
OD |
40 |
OD |
35 |
OD |
30 |
OD |
| 145/80 R10 |
486 |
165/70 R10 |
486 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 155/80 R13 |
578 |
175/70 R13 |
576 |
175/65 R14 |
584 |
185/60 R14 |
578 |
185/55 R15 |
585 |
195/50 R15 |
577 |
215/45 R15 |
575 |
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
205/50 R15 |
587 |
|
|
|
|
|
|
|
|
| 165/80 R13 |
594 |
165/70 R14 |
588 |
185/65 R14 |
596 |
195/60 R14 |
590 |
195/55 R15 |
595 |
205/50 R15 |
587 |
205/45 R16 |
590 |
205/40 R17 |
596 |
|
|
|
|
| |
|
175/70 R14 |
602 |
|
|
175/60 R15 |
591 |
|
|
|
|
|
|
|
|
|
|
|
|
| 175/80 R13 |
610 |
185/70 R14 |
616 |
175/65 R15 |
609 |
185/60 R15 |
603 |
205/55 R15 |
607 |
225/50 R15 |
607 |
225/45 R16 |
608 |
215/40 R17 |
604 |
245/35 R17 |
604 |
|
|
| |
|
|
|
195/65 R14 |
610 |
195/60 R15 |
615 |
|
|
205/50 R16 |
612 |
205/45 R17 |
616 |
225/40 R17 |
612 |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
195/50 R16 |
602 |
|
|
|
|
|
|
|
|
| 185/80 R13 |
626 |
195/70 R14 |
630 |
185/65 R15 |
621 |
205/60 R15 |
627 |
205/55 R16 |
632 |
225/50 R16 |
632 |
215/45 R17 |
626 |
235/40 R17 |
620 |
|
|
|
|
| |
|
|
|
|
|
|
|
195/55 R16 |
620 |
|
|
245/45 R16 |
626 |
|
|
|
|
|
|
| 165/80 R14 |
620 |
185/70 R14 |
616 |
185/65 R15 |
621 |
205/60 R15 |
627 |
|
|
|
|
215/45 R17 |
626 |
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
245/45 R16 |
626 |
|
|
|
|
|
|
| 175/80 R14 |
636 |
195/70 R14 |
630 |
195/65 R15 |
635 |
205/60 R15 |
627 |
205/55 R16 |
632 |
225/50 R16 |
632 |
215/45 R17 |
626 |
245/40 R17 |
628 |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
245/45 R16 |
626 |
255/40 R17 |
636 |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
225/45 R17 |
634 |
225/40 R18 |
637 |
|
|
|
|
| |
|
|
|
|
|
|
|
215/55 R16 |
642 |
235/50 R16 |
642 |
235/45 R17 |
644 |
265/40 R17 |
644 |
265/35 R18 |
643 |
|
|
| 185/80 R14 |
652 |
195/70 R15 |
655 |
205/65 R15 |
647 |
225/60 R15 |
651 |
225/55 R16 |
654 |
225/50 R17 |
658 |
245/45 R17 |
652 |
235/40 R18 |
645 |
275/35 R18 |
649 |
285/30 R19 |
655 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
245/40 R18 |
653 |
255/35 R19 |
661 |
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
255/40 R18 |
661 |
|
|
|
|
| |
|
205/70 R15 |
669 |
|
|
225/60 R16 |
676 |
|
|
|
|
245/45 R18 |
677 |
265/40 R18 |
669 |
275/35 R19 |
675 |
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
275/40 R18 |
677 |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
245/40 R19 |
679 |
|
|
|
|
| |
|
|
|
|
|
235/60 R16 |
688 |
225/55 R17 |
680 |
235/50 R18 |
693 |
255/45 R18 |
687 |
255/40 R19 |
687 |
|
|
|
|
| |
|
|
|
|
|
245/60 R16 |
700 |
|
|
|
|
245/45 R19 |
703 |
275/40 R19 |
703 |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
285/50 R18 |
743 |
295/45 R19 |
749 |
|
|
|
|
|
|
Speed Ratings
| Speed symbol |
G |
J |
K |
L |
M |
N |
P |
Q |
R |
S |
T |
U |
H |
V |
W |
Y |
ZR |
| Speed (km/h) |
90 |
100 |
110 |
120 |
130 |
140 |
150 |
160 |
170 |
180 |
190 |
200 |
210 |
240 |
270 |
300 |
240+ |
Reading A Tyre Sidewall