Comparison of tire sizes 215/50 R17 and 235/40 R18
215/50R17
215
Tire width 
50
Profile height 
R17
Tire diameter 
492
RPM per km 215mm108mm647mm2032mm
215
50
17
235
40
18
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 647 | 645 | -2 (-0.3%) | ||
| Width, mm | 215 | 235 | +20 (+9.3%) | ||
| Circumference, mm | 2032 | 2027 | -5 (-0.2%) | ||
| Profile height, mm | 108 | 94 | -14 (-13%) | ||
| RPM per km | 492 | 493 | +1 (+0.2%) | ||
| Clearance change, mm | -1 | ||||
| Result: | The diameter differs by -0.3%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 99.8 |
| Difference (km/h) | -0.2 |
Sizes for comparison of tires 215/50 R17
R17
R16 -1
R18 +1
R15 -2
R19 +2
Sizes for comparison of tires 235/40 R18
R18
R17 -1
R19 +1
R16 -2
R20 +2
Ads by size 235/40 R18
-
1Tires Firenza Firenza, 235/40/R18, Used.For sale Summer tires Firenza Firenza, 235/40/R18, In stock: 1 pc., Condition: Used.
R1835.00 €/pc.12/07/2025Riga -
2Tires Hankook W330, 235/40/R18, New.For sale All season tires Hankook W330, 235/40/R18, In stock: 2 pc., Condition: New.
R18130 €/pc.27/06/2025Riga
