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Calculation of tire size 225/45 R19
2
2
5
/
4
5
R
1
9
225
Tire width
45
Profile height
R19
Tire diameter
465
RPM per km
225
mm
101
mm
685
mm
2152
mm
Enter size
225
/
45
R
19
New size
195
/
65
R
15
Calculate
inches
millimeter
Parameters Sizes
Diameter
685
mm
Width
225
mm
Circumference
2152
mm
Profile height
101
mm
RPM per km
465
Parameters Sizes
Old
New
Diameter,
mm
685
Width,
mm
225
Circumference,
mm
2152
Profile height,
mm
101
RPM per km
465
Clearance change,
mm
Result:
Speedometer reading (km/h)
Real speed (km/h)
Difference (km/h)
0
Sizes for comparison of tires 225/45 R19
R19
225/40 R19 -3.2%
235/45 R19 +1.3%
245/40 R19 -0.9%
245/45 R19 +2.6%
255/35 R19 -3.5%
255/40 R19 +0.3%
255/45 R19 +3.9%
265/35 R19 -2.5%
265/40 R19 +1.5%
R18
-1
215/55 R18 +1.3%
225/45 R18 -3.6%
225/50 R18 -0.4%
225/55 R18 +2.9%
235/45 R18 -2.3%
235/50 R18 +1%
245/45 R18 -1%
245/50 R18 +2.5%
255/40 R18 -3.5%
255/45 R18 +0.3%
265/40 R18 -2.3%
265/45 R18 +1.6%
R20
+1
225/35 R20 -2.8%
235/35 R20 -1.8%
245/35 R20 -0.7%
245/40 R20 +2.8%
255/30 R20 -3.5%
255/35 R20 +0.3%
255/40 R20 +3.9%
265/30 R20 -2.6%
265/35 R20 +1.3%
R17
-2
215/55 R17 -2.5%
215/60 R17 +0.7%
215/65 R17 +3.8%
225/55 R17 -0.9%
225/60 R17 +2.5%
235/50 R17 -2.6%
235/55 R17 +0.7%
245/55 R17 +2.3%
255/45 R17 -3.5%
255/50 R17 +0.3%
255/55 R17 +3.9%
R21
+2
245/35 R21 +2.9%
255/30 R21 +0.1%
255/35 R21 +3.9%
225
Tire width 
45
Profile height 
R19
Tire diameter 
465
RPM per km