Convert Backspacing/Offset
Wheel Width
4"
4.5"
5"
5.5"
6"
6.5"
7"
7.5"
8"
8.5"
9"
9.5"
10"
10.5"
11"
11.5"
12"
12.5"
13"
14"
16"
18"
Backspacing
in.
Wheel Offset
mm
Start typing in either field to see results.
Original Configuration
/
R
Wheel Offset
-76mm
-65mm
-64mm
-63mm
-62mm
-61mm
-60mm
-59mm
-58mm
-57mm
-56mm
-55mm
-54mm
-53mm
-52mm
-51mm
-50mm
-49mm
-48mm
-47mm
-46mm
-45mm
-44mm
-43mm
-42mm
-41mm
-40mm
-39mm
-38mm
-37mm
-36mm
-35mm
-34mm
-33mm
-32mm
-31mm
-30mm
-29mm
-28mm
-27mm
-26mm
-25mm
-24mm
-23mm
-22mm
-21mm
-20mm
-19mm
-18mm
-17mm
-16mm
-15mm
-14mm
-13mm
-12mm
-11mm
-10mm
-9mm
-8mm
-7mm
-6mm
-5mm
-4mm
-3mm
-2mm
-1mm
0mm
+1mm
+2mm
+3mm
+4mm
+5mm
+6mm
+7mm
+8mm
+9mm
+10mm
+11mm
+12mm
+13mm
+14mm
+15mm
+16mm
+17mm
+18mm
+19mm
+20mm
+21mm
+22mm
+23mm
+24mm
+25mm
+26mm
+27mm
+28mm
+29mm
+30mm
+31mm
+32mm
+33mm
+34mm
+35mm
+36mm
+37mm
+38mm
+39mm
+40mm
+41mm
+42mm
+43mm
+44mm
+45mm
+46mm
+47mm
+48mm
+49mm
+50mm
+51mm
+52mm
+53mm
+54mm
+55mm
+56mm
+57mm
+58mm
+59mm
+60mm
+61mm
+62mm
+63mm
+64mm
+65mm
Wheel Spacer
None
.25"
.5"
.75"
1"
1.25"
1.5"
1.75"
2"
New Configuration
/
R
Wheel Offset
-76mm
-65mm
-64mm
-63mm
-62mm
-61mm
-60mm
-59mm
-58mm
-57mm
-56mm
-55mm
-54mm
-53mm
-52mm
-51mm
-50mm
-49mm
-48mm
-47mm
-46mm
-45mm
-44mm
-43mm
-42mm
-41mm
-40mm
-39mm
-38mm
-37mm
-36mm
-35mm
-34mm
-33mm
-32mm
-31mm
-30mm
-29mm
-28mm
-27mm
-26mm
-25mm
-24mm
-23mm
-22mm
-21mm
-20mm
-19mm
-18mm
-17mm
-16mm
-15mm
-14mm
-13mm
-12mm
-11mm
-10mm
-9mm
-8mm
-7mm
-6mm
-5mm
-4mm
-3mm
-2mm
-1mm
0mm
+1mm
+2mm
+3mm
+4mm
+5mm
+6mm
+7mm
+8mm
+9mm
+10mm
+11mm
+12mm
+13mm
+14mm
+15mm
+16mm
+17mm
+18mm
+19mm
+20mm
+21mm
+22mm
+23mm
+24mm
+25mm
+26mm
+27mm
+28mm
+29mm
+30mm
+31mm
+32mm
+33mm
+34mm
+35mm
+36mm
+37mm
+38mm
+39mm
+40mm
+41mm
+42mm
+43mm
+44mm
+45mm
+46mm
+47mm
+48mm
+49mm
+50mm
+51mm
+52mm
+53mm
+54mm
+55mm
+56mm
+57mm
+58mm
+59mm
+60mm
+61mm
+62mm
+63mm
+64mm
+65mm
Wheel Spacer
None
.25"
.5"
.75"
1"
1.25"
1.5"
1.75"
2"
Compare
Comparison Summary
Spec
Original
New Size
Diameter
Width
Sidewall
Circumference
Revs/Mile
Reset
mm
inches
Show Alternate Sizes [+]
The top of the tire to the fender well is:
The inner sidewall to the suspension and frame is:
The outer sidewall is:
Hide Dimensions [-]
Width
Dia.
Width
Dia.
Circ.
Rim
Wall
Revs/Mile
Circ.
Rim
Wall
Revs/Mile
Speedometer Error
(Set Original Configuration to OEM Size)
Speed
20 mph
30 mph
40 mph
50 mph
60 mph
70 mph
80 mph
90 mph
Actual
Available Tires
Alternate Sizes
New Configuration - Alternate Tire Sizes
Use the tire calculator to populate a list of alternate tire sizes.
Click on each size to see available tires in that size.