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Calculation of tire size 225/40 R17
2
2
5
/
4
0
R
1
7
225
Tire width
40
Profile height
R17
Tire diameter
520
RPM per km
225
mm
90
mm
612
mm
1922
mm
Enter size
225
/
40
R
17
New size
195
/
65
R
15
Calculate
inches
millimeter
Parameters Sizes
Diameter
612
mm
Width
225
mm
Circumference
1922
mm
Profile height
90
mm
RPM per km
520
Parameters Sizes
Old
New
Diameter,
mm
612
Width,
mm
225
Circumference,
mm
1922
Profile height,
mm
90
RPM per km
520
Clearance change,
mm
Result:
Speedometer reading (km/h)
Real speed (km/h)
Difference (km/h)
0
Sizes for comparison of tires 225/40 R17
R17
205/40 R17 -2.6%
205/45 R17 +0.7%
215/40 R17 -1.3%
215/45 R17 +2.1%
225/35 R17 -3.8%
225/45 R17 +3.6%
235/40 R17 +1.3%
245/35 R17 -1.5%
245/40 R17 +2.6%
255/40 R17 +3.9%
265/35 R17 +0.8%
R16
-1
185/50 R16 -3.4%
185/55 R16 -0.3%
195/50 R16 -1.8%
195/55 R16 +1.5%
205/45 R16 -3.4%
205/50 R16 -0.2%
205/55 R16 +3.3%
215/45 R16 -2%
215/50 R16 +1.5%
225/45 R16 -0.5%
225/50 R16 +3.1%
245/45 R16 +2.5%
R18
+1
205/40 R18 +1.5%
215/35 R18 -0.7%
215/40 R18 +2.8%
225/35 R18 +0.5%
235/35 R18 +1.6%
245/35 R18 +2.8%
255/35 R18 +3.9%
R15
-2
185/60 R15 -1.5%
185/65 R15 +1.6%
195/55 R15 -2.6%
195/60 R15 +0.5%
195/65 R15 +3.8%
205/55 R15 -0.8%
205/60 R15 +2.5%
225/50 R15 -1%
R19
+2
215/35 R19 +3.4%
255/30 R19 +3.9%
0
225
Tire width 
40
Profile height 
R17
Tire diameter 
520
RPM per km 