Wheels and Tires

Wheel Measurements
Bolt Spacing & Specs
Measuring Clearance
Wheel Calculators

Tires

Wheel Measurements

Rim width is measured from inside the lip
Backspacing is measured from outside the lip
positive/negative offset is measured from backspacing to wheel center
positive offset shifts the wheel inwards
negative offset shifts the wheel outwards

These are the specs on the rims I have :

Rear Spacing

Offset

Centre Bore

Rim	Total Width	Lip Width	Rim Width
	7 13/16" 19.8cm	~1/2" ~1.3cm	7" 17.8cm	3 1/8" 7.9cm	-20mm	8.3cm
	8" 20.3cm	1/2" 1.3cm	7" 17.8cm	4 1/4" 10.8cm	+6.5mm	7.1

These are the available Chrysler rims from Year-1 :

Rear Spacing

Offset

Rim	Rim Width
MSW1	7"	4"	0mm
MSW2	8"	4"	-12.7mm
MSW3	8"	4.5"	0mm
MSW4	10"	5.5"	0mm

These are the available Chrysler rims from Summit (same) :

These are the specs from the original owners manual. The letters "J" and "JK" refer to the shape of the wheel where the tire bead meets it.

Bolt Spacing & Specs

Vehicle	Year	Stock Rim	Bolt Pattern	Lugs	Center Bore	Offset
Full size Dodge	57-77	14x6	5x4.5"	1/2-RH	Variable	0
Full size Chevy	55-88	14", 15"	5x4.75"	7/16-RH	Variable	0
Full size Ford	65-72	15x6	5x4.5"	1/2-RH	Variable	0

Measuring Clearance

Rear Measurements
Measured Side	Measurement	Value
Left Rear	Inner Spacing	6 7/8" 17.5cm
Left Rear	Outer Spacing	6 3/4" 17.2cm
Right Rear	Inner Spacing	7 3/16" 18.3cm
Right Rear	Outer Spacing	6 7/16" 16.4cm

Front Measurements
Measured Side	Measurement	Value
Fore - Front Left Inner fender	Inner Spacing	1" 2.5cm
Aft - Front Left Inner Fender	Outer Spacing	1 3/4" 4.4cm
Front Left Fender-to-Wheel	Fender Spacing	~1 3/4" ~4.4cm
Fore - Front Right Inner fender	Inner Spacing	1 1/2" 3.8cm
Aft - Front Right Inner Fender	Outer Spacing	1/2" 1.3cm

Min Inner Rear Spacing = 6 7/8", 17.5cm
Min Outer Rear Spacing = 6 7/16", 16.4cm

Wheel Calculators

Ex: 235/60R15 = Diameter(66.3cm)

**Tire Diamater Calculator**
Width	Profile	Rim Size		Diameter
	/	R		cm

**Enter the rim information :**
	rim width (inches) :
	backspace (inches) :
	estimated lip width (inches) :
	offset (mm)


	Rear wheel Max Size Calculation :
	inner spacing (mm) :
	outer spacing (mm) :

	max tire(mm) :

Subtract an inch or more from the above answer to give some extra space, and your done.

Tires

These are the specs from the original owners manual. :

Tire Conversion Chart

1949 to 1964	1965 to 1970	1970 to 1980	1980 - On
NUMERIC		ALPHA NUMERIC	EUROMETRIC	P-METRIC	EUROMETRIC or P-METRIC
"90" to "80"-Series		78 to 50-Series	"82"-Series	80-, 75-series	70-series	65-series	60-series	50-series
			145R10		165/70R10
			145R12	P145/80R12	165/70R12
	6.00-12		155R12	P155/80R12
						165/65R13
			145R13
			155R13	P155/80R13	175/70R13		195/60R13	215/50R13
5.60-13	6.00-13	A	165R13	P165/80R13	185/70R13		205/60R13
	6.50-13	B	175R13	P175/80R13
		C		P185/80R13
	7.00-13	D	185R13
			195R13
						175/65R14
6.00-14	6.45-14		155R14		175/70R14	185/65R14
		B	165R14	P175/75R14	185/70R14	195/65R14	205/60R14
6.50-14	6.95-14	C	175R14	P185/75R14	195/70R14		215/60R14
		D
7.00-14	7.35-14	E	185R14	P195/75R14	205/70R14		225/60R14	245/50R14
7.50-14	7.75-14	F	195R14	P205/75R14	215/70R14		235/60R14
8.00-14	8.25-14	G	205R14	P215/75R14	225/70R14		245/60R14	265/50R14
8.50-14	8.55-14	H	215R14	P225/75R14
9.00-14		J	225R14
9.50-14		L
	5.60-15	A	155R15	P155/80R15		185/65R15	195/60R15
6.00-15		B	165R15	P165/80R15	185/70R15	195/65R15	205/60R15	225/50R15
6.50-15	6.85-15	C	175R15		195/70R15	205/65R15	215/60R15
		D
	7.35-15	E	185R15	P195/75R15	205/70R15	215/65R15	225/60R15
6.70-15	7.75-15	F	195R15	P205/75R15	215/70R15		235/60R15
	8.15-15
7.10-15		G	205R15	P215/75R15	225/70R15	235/65R15	245/60R15	265/50R15
	8.25-15
	8.45-15
7.60-15		H	215R15	P225/75R15	235/70R15		255/60R15	275/50R15
	8.55-15
8.00-15	8.85-15	J	225R15	P225/75R15	235/70R15		265/60R15
8.20-15	9.00-15	K
	9.15-15	L	235R15	P235/75R15	255/70R15		275/60R15	295/50R15
		N						305/50R15
• Listing in chart does not imply complete interchangeability.				• When changing tire sizes, dimensional clearances must be checked.

**Metric to Imperial converter :**
INCHES			MILLIMETERS