Calculators

Air Pressure

Input
Tire Type	Reserve Load	Enter Load Index Enter Load Reserve
Output

Miles/Kilometers

Input
Miles:	Kilometers:
Output

Offset Backspacing

Input
Wheel Width	Offset	Backspacing

Output
Please enter Offset or Backspacing

Hide Chart

Offset	Width
	5	5.5	6	6.5	7	7.5	8	8.5	9	9.5	10	10.5	11	11.5	12
-57	0.76"	1.01"	1.26"	1.51"	1.76"	2.01"	2.26"	2.51"	2.76"	3.01"	3.26"	3.51"	3.76"	4.01"	4.26"
-44	1.27"	1.52"	1.77"	2.02"	2.27"	2.52"	2.77"	3.02"	3.27"	3.52"	3.77"	4.02"	4.27"	4.52"	4.77"
-38	1.50"	1.75"	2.00"	2.25"	2.50"	2.75"	3.00"	3.25"	3.50"	3.75"	4.00"	4.25"	4.50"	4.75"	5.00"
-32	1.74"	1.99"	2.24"	2.49"	2.74"	2.99"	3.24"	3.49"	3.74"	3.99"	4.24"	4.49"	4.74"	4.99"	5.24"
-25	2.02"	2.27"	2.52"	2.77"	3.02"	3.27"	3.52"	3.77"	4.02"	4.27"	4.52"	4.77"	5.02"	5.27"	5.52"
-19	2.25"	2.50"	2.75"	3.00"	3.25"	3.50"	3.75"	4.00"	4.25"	4.50"	4.75"	5.00"	5.25"	5.50"	5.75"
-12	2.53"	2.78"	3.03"	3.28"	3.53"	3.78"	4.03"	4.28"	4.53"	4.78"	5.03"	5.28"	5.53"	5.78"	6.03"
-6	2.76"	3.01"	3.26"	3.51"	3.76"	4.01"	4.26"	4.51"	4.76"	5.01"	5.26"	5.51"	5.76"	6.01"	6.26"
0	3.00"	3.25"	3.50"	3.75"	4.00"	4.25"	4.50"	4.75"	5.00"	5.25"	5.50"	5.75"	6.00"	6.25"	6.50"
6	3.24"	3.49"	3.74"	3.99"	4.24"	4.49"	4.74"	4.99"	5.24"	5.49"	5.74"	5.99"	6.24"	6.49"	6.74"
12	3.47"	3.72"	3.97"	4.22"	4.47"	4.72"	4.97"	5.22"	5.47"	5.72"	5.97"	6.22"	6.47"	6.72"	6.97"
19	3.75"	4.00"	4.25"	4.50"	4.75"	5.00"	5.25"	5.50"	5.75"	6.00"	6.25"	6.50"	6.75"	7.00"	7.25"
32	4.26"	4.51"	4.76"	5.01"	5.26"	5.51"	5.76"	6.01"	6.26"	6.51"	6.76"	7.01"	7.26"	7.51"	7.76"
38	4.50"	4.75"	5.00"	5.25"	5.50"	5.75"	6.00"	6.25"	6.50"	6.75"	7.00"	7.25"	7.50"	7.75"	8.00"
44	4.73"	4.98"	5.23"	5.48"	5.73"	5.98"	6.23"	6.48"	6.73"	6.98"	7.23"	7.48"	7.73"	7.98"	8.23"
51	5.01"	5.26"	5.51"	5.76"	6.01"	6.26"	6.51"	6.76"	7.01"	7.26"	7.51"	7.76"	8.01"	8.26"	8.51"
57	5.24"	5.49"	5.74"	5.99"	6.24"	6.49"	6.74"	6.99"	7.24"	7.49"	7.74"	7.99"	8.24"	8.49"	8.74"

Proration Calculator

Miles On

Miles Off

Original Tread Depth

Remaining Tread Depth

Warranted Miles

Miles Driven

Miles per 32nd

Projected Miles

Percent Coverage

Percent Worn

ProRated to 2/32s

Retail/Profit Margin

Input

Retail

Cost ($):

Profit Margin (%):

QTY of units

x1 x2 x3 x4 x5 x6

Profit Margin

Retail Price ($):

Cost ($):

Output

2323

Sales Calculator

Input

Output

Cost Per Tire

Tire/Wheel 1

Tire/Wheel 2 (Optional)

Tire/Wheel 3 (Optional)

Quantity

Total Cost

Input

Cost Per Tire

Tire/Wheel 1

Quantity

Output

Total Cost

Cost Per Tire

Tire/Wheel 2 (Optional)

Quantity

Output

Total Cost

Cost Per Tire

Tire/Wheel 3 (Optional)

Quantity

Total Cost

Total Cost of Tires/Wheels Only

5% Savings

10% Savings

Total Cost of Tires/Wheels Only

5% Savings

10% Savings

Percent Off

Input

Enter $ Amount

(For military discount or everyday credit offer, use subtotal of cart.)

Output

5%

$

0.00 10%

$

0.00 15%

$

0.00 20%

$

0.00 5%

$

0.00 15%

$

0.00 10%

$

0.00 20%

$

0.00

Speed Rating

Rating Symbol	Speed (KMH)	Speed (MPH)	Rating Symbol	Speed (KMH)	Speed (MPH)
B	50	31	P	150	93
C	60	37	Q	160	99
D	65	40	R	170	106
E	70	43	S	180	112
F	80	50	T	190	118
G	90	56	U	200	124
J	100	62	H	210	130
K	110	68	V	240	149
L	120	75	W*	270	168
M	130	81	Y*	300	185
N	140	87

For tires with a maximum speed capability above 149mph, a ZR MAY appear in the size description.

For tires with a maximum speed capability above 186mph, a ZR MUST appear in the size description.

Staggered Fitment

Input

Old

Front

New

Front

Back

Output

Front	Old	New	Difference
Sidewall Height	Output	Output	Output
Section Width	Output	Output	Output
Overall Diameter	Output	Output	Output
Rear	Old	New	Difference
Sidewall Height	Output	Output	Output
Section Width	Output	Output	Output
Overall Diameter	Output	Output	Output
Overall Diameter Diff. Between Sets	Old		New
Front	Output		Output
Rear	Output		Output
Difference	Output		Output

Tire Size (Metric/High Float)

Input

Old Sizes

Metric High Float

Section Width

Aspect Ratio

Rim Width

New Sizes

Metric High Float

Section Width

Aspect Ratio

Rim Width

If your
speedometer reads

You are
traveling about

Output

Totals	Old Tire	New Tire	Difference
Sidewall Height	test	test	test
Selection Width	test	test	test
Overall Diameter	test	test	test
Tire Circumference	test	test	test
Rev. / Mile	test	test	test

Tire to Wheel Width

P-Metric	70 to 85		50 to 65		45		35 to 40		20 to 30
TIRE WIDTH	MIN	MAX	MIN	MAX	MIN	MAX	MIN	MAX	MIN	MAX
P-Metric	70 to 85		50 to 65		45		35 to 40		20 to 30
TIRE WIDTH	MIN	MAX	MIN	MAX	MIN	MAX	MIN	MAX	MIN	MAX
165	4	5.5	4.5	6	5	6.5	5.5	6.5	5	6.5
175	4.5	6	4.5	6.5	5.5	6.5	5.5	7	5.5	7
185	4.5	6.5	5	7	5.5	7	6	7.5	6	7.5
195	5	6.5	5	7	6	7.5	6.5	8	6	7.5
205	5	7	5.5	7.5	6	8	6.5	8.5	6.5	8
215	5.5	7.5	5.5	8	6.5	8.5	7	8.5	7	8.5
225	5.5	8	6	8	7	8.5	7	9	7	8.5
235	6	8	6	8.5	7	9	7.5	9.5	7.5	9
245	6	8.5	6.5	9	7.5	9.5	8	10	8	9.5
255	6.5	9	6.5	9.5	7.5	10	8	10.5	8	10
265	6.5	9	7	9.5	8	10	8.5	10.5	8.5	10
275	7	9.5	7.5	10	8.5	10.5	9	11	9	10.5
285	7	10	7.5	10.5	8.5	11	9	11.5	9	11
295	7	10	8	11	9	11.5	9.5	12	9.5	11.5
305	7.5	10.5	8	11	9	11.5	10	12.5	10	11.5
315	7.5	11	8.5	11.5	9.5	12	10	13	10	12
325	8	11	8.5	12	10	12.5	10.5	13	10.5	12.5
335	8	11.5	9	12	10	13	11	13.5	11	12.5
345	8.5	12	9	12.5	10.5	13.5	11	14	11	13
355	8.5	12	9.5	13	10.5	13.5	11.5	14.5	11.5	13.5

LT-Metric	85 to 90		70 to 80		50 to 65		45
TIRE WIDTH	MIN	MAX	MIN	MAX	MIN	MAX	MIN	MAX
165	4	5.5	4	5.5	4.5	6	5	6.5
175	4.5	5.5	4.5	6	5	6.5	5.5	6.5
185	4.5	6	4.5	6.5	5	7	5.5	7
195	5	6.5	5	6.5	5.5	7	6	7.5
205	5	6.5	5	7	6	7.5	6	8
215	5.5	7	5.5	7.5	6	8	6.5	8.5
225	5.5	7.5	5.5	8	6.5	8	7	8.5
235	6	7.5	6	8	6.5	8.5	7	9
245	6	8	6	8.5	7	9	7.5	9.5
255	6.5	8.5	6.5	9	7	9.5	7.5	10
265	6.5	8.5	6.5	9	7.5	9.5	8	10
275	7	9	7	9.5	7.5	10	8.5	10.5
285	7	9	7	10	8	10.5	8.5	11
295	7	9.5	7	10	8	11	9	11.5
305	7.5	10	7.5	10.5	8.5	11	9	11.5
315	7.5	10	7.5	11	8.5	11.5	9.5	12
325	8	10.5	8	11	9	12	10	12.5
335	8	11	8	11.5	9.5	12	10	13
345	8.5	11	8.5	12	10	12.5	10.5	13.5
355	8.5	11.5	8.5	12	10	13	10.5	13.5

LT-HF	15		16		17		18		20		22		24
TIRE WIDTH	MIN	MAX	MIN	MAX	MIN	MAX	MIN	MAX	MIN	MAX	MIN	MAX	MIN	MAX
30x9.50	6	8.5	6	8.5	6.5	9	6.5	9	6.5	9	6.5	9	6.5	9
31x9.50	6	8.5	6	8.5	6	8.5	6.5	9	6.5	9	6.5	9	6.5	9
31x10.50	6.5	9.5	6.5	9.5	7	10	7	10	7	10	7	10	7	10
31x11.50	7.5	11	7.5	11	7.5	11	7.5	11	7.5	11	7.5	11	7.5	11
32x10.50	6.5	9.5	6.5	9.5	6.5	9.5	7	10	7	10	7	10	7	10
32x11.50	7	10.5	7.5	11	7.5	11	7.5	11	7.5	11	7.5	11	7.5	11
32x12.50	8.5	12	8.5	12	8.5	12	8.5	12	8.5	12	8.5	12	8.5	12
33x9.50	6	8.5	6	8.5	6	8.5	6	8.5	6.5	9	6.5	9	6.5	9
33x10.50	6.5	9.5	6.5	9.5	6.5	9.5	6.5	9.5	7	10	7	10	7	10
33x11.50	7	10.5	7	10.5	7.5	11	7.5	11	7.5	11	7.5	11	7.5	11
33x12.50	7.5	11.5	8.5	12	8.5	12	8.5	12	8.5	12	8.5	12	8.5	12
33x13.50	9	13	9	13	9	13	9	13	9	13	9	13	9	13
35x11.50	7	10.5	7	10.5	7	10.5	7	10.5	7.5	11	7.5	11	7.5	11
35x12.50	7.5	11.5	7.5	11.5	7.5	11.5	8.5	12	8.5	12	8.5	12	8.5	12
35x13.50	8.5	12.5	8.5	12.5	9	13	9	13	9	13	9	13	9	13
35x14.50	9.5	14	9.5	14	9.5	14	9.5	14	9.5	14	9.5	14	9.5	14
36x12.50	7.5	11.5	7.5	11.5	7.5	11.5	7.5	11.5	8.5	12	8.5	12	8.5	12
36x13.50	8.5	12.5	8.5	12.5	8.5	12.5	9	13	9	13	9	13	9	13
36x14.50	9	13	9.5	14	9.5	14	9.5	14	9.5	14	9.5	14	9.5	14
36x15.50	10.5	15	10.5	15	10.5	15	10.5	15	10.5	15	10.5	15	10.5	15
37x11.50	7	10.5	7	10.5	7	10.5	7	10.5	7	10.5	7.5	11	7.5	11
37x12.50	7.5	11.5	7.5	11.5	7.5	11.5	7.5	11.5	8.5	12	8.5	12	8.5	12
37x13.50	8.5	12.5	8.5	12.5	8.5	12.5	8.5	12.5	9	13	9	13	9	13
37x14.50	9	13	9	13	9.5	14	9.5	14	9.5	14	9.5	14	9.5	14
38x13.50	8.5	12.5	8.5	12.5	8.5	12.5	8.5	12.5	9	13	9	13	9	13
38x14.50	9	13	9	13	9	13	9.5	14	9.5	14	9.5	14	9.5	14
38x15.50	9.5	14	9.5	14	10.5	15	10.5	15	10.5	15	10.5	15	10.5	15
39x13.50	8.5	12.5	8.5	12.5	8.5	12.5	8.5	12.5	8.5	12.5	9	13	9	13
39x14.50	9	13	9	13	9	13	9	13	9.5	14	9.5	14	9.5	14
39x15.50	9.5	14	9.5	14	9.5	14	10.5	15	10.5	15	10.5	15	10.5	15
40x13.50	8.5	12.5	8.5	12.5	8.5	12.5	8.5	12.5	8.5	12.5	9	13	9	13
40x14.50	9	13	9	13	9	13	9	13	9.5	14	9.5	14	9.5	14
40x15.50	9.5	14	9.5	14	9.5	14	9.5	14	10.5	15	10.5	15	10.5	15
42x14.50	9	13	9	13	9	13	9	13	9	13	9.5	14	9.5	14
42x15.00	9.5	13.5	9.5	13.5	9.5	13.5	9.5	13.5	9.5	13.5	10	14.5	10	14.5

Euro C	45		50		55		60		65		70		75		80		85		95
Tire Width	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max
165	0	0	0	0	5	5.5	4	5	4.5	5	4.5	5	4	5	5	5.5	0	0	0	0
175	0	0	0	0	0	0	4.5	5.5	5	5.5	4.5	5.5	4.5	5.5	0	0	0	0	0	0
185	0	0	0	0	5.5	6	5.5	6	5	6	5	6	4.5	6	5.5	6	0	0	0	0
195	0	0	0	0	5	6	5.5	6.5	5.5	6	5	6	5	6	0	0	0	0	0	0
205	0	0	0	0	6	6.5	6	6.5	5.5	6.5	5.5	6.5	5	6.5	6	6.5	0	0	0	0
215	0	0	6.5	7	6.5	7	6	7	6	7	5.5	7	5.5	7	6.5	7	6.5	7	0	0
225	6	7	6.5	7.5	6.5	7.5	6.5	7.5	6	7	6	7	6	7	6.5	7.5	6.5	7.5	0	0
235	6	7.5	7	7.5	0	0	6.5	7.5	6.5	7.5	6.5	7.5	6.5	7.5	0	0	7	7.5	0	0
245	7.5	8.5	0	0	0	0	6.5	7.5	6.5	7.5	6.5	7.5	6.5	7.5	0	0	0	0	7.5	8.5
255	0	0	7.5	8	7.5	8.5	6.5	8	7	8	7	8	6.5	8	7.5	8.5	7.5	8.5	0	0
265	0	0	0	0	0	0	7	8.5	7	8.5	7	8.5	7	8.5	0	0	0	0	0	0
285	0	0	0	0	8.5	9.5	0	0	8	9	8	9	0	0	8.5	9.5	0	0	0	0
295	0	0	0	0	0	0	8.5	9.5	0	0	0	0	8.5	9.5	0	0	0	0	0	0

High Load	30		35		40		45		50		55		60		65		70
Tire Width	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max
225	7.5	8.5	7.5	8.5	7.5	8.5	7	8	6.5	7.5	6.5	7.5	6	7	6	7	6	7
235	8	9	8	9	8	9	7.5	8.5	7	8	7	8	6.5	7.5	6.5	7.5	6.5	7.5
245	8	9	8	9	8	9	7.5	8.5	7	8	7	8	6.5	7.5	6.5	7.5	6.5	7.5
255	8.5	9.5	8.5	9.5	8.5	9.5	8	9	7.5	8.5	7.5	8.5	7	8	7	8	7	8
265	9	10	9	10	9	10	8.5	9.5	8	9	8	9	7.5	8.5	7.5	8.5	7.5	8.5
275	9	10	9	10	9	10	8.5	9.5	8	9	8	9	7.5	8.5	7.5	8.5	7.5	8.5
285	9.5	10.5	9.5	10.5	9.5	10.5	9	10	8.5	9.5	8.5	9.5	8	9	8	9	0	0
295	10	11	10	11	10	11	9.5	10.5	9	10	9	10	8	9	0	0	0	0
305	10.5	11.5	10.5	11.5	10.5	11.5	9.5	10.5	9	10	9	10	0	0	0	0	0	0
315	10.5	11.5	10.5	11.5	10.5	11.5	10	11	9.5	10.5	0	0	0	0	0	0	0	0
325	11	12	11	12	11	12	10.5	11.5	0	0	0	0	0	0	0	0	0	0
335	11.5	12.5	11.5	12.5	11.5	12.5	0	0	0	0	0	0	0	0	0	0	0	0
345	11.5	12.5	11.5	12.5	11.5	12.5	0	0	0	0	0	0	0	0	0	0	0	0
355	12	13	12	13	0	0	0	0	0	0	0	0	0	0	0	0	0	0
365	12.5	13.5	12.5	13.5	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Trailer

Input

Gross Vehicle Weight Training (LBs)

Trailer Type

Standard

Gooseneck

# of Axles

# Assemblies per Axle

Output

Load Requirement

Gross Axis Weight Rating

Load Requirement Per Tire

POST data

VIN Lookup

Input

Enter 10th digit of VIN Model Year:

Output

Hide Chart

10th Digit	Model Year	10th Digit	Model Year	10th Digit	Model Year	10th Digit	Model Year
A	1980	O	Not Used	3	2003	G	2016
B	1981	P	1993	4	2004	H	2017
C	1982	Q	Not Used	5	2005	I	Not Used
D	1983	R	1994	6	2006	J	2018
E	1984	S	1995	7	2007	K	2019
F	1985	T	1996	8	2008	L	2020
G	1986	U	Not Used	9	2009	M	2021
H	1987	V	1997	A	2010	N	2022
I	Not Used	W	1998	B	2011	O	Not Used
J	1988	X	1999	C	2012	P	2023
K	1989	Y	2000	D	2013	Q	Not Used
L	1990	Z	Not Used	E	2014	R	2024
M	1991	N	2001	F	2015	S	2025
N	1992	2	2002

Vintage Tire Sizes

PRE-1964	1965-72	80 SERIES METRIC	ALPHA NUMERIC 78 SERIES	SERIES P-METRIC 75 SERIES RADIAL	P-METRIC 70 SERIES RADIAL
5.90-13	600-13	165-13	A78-13	P165/75R13	P175/70R13
6.40-13	650-13	175-13	B78-13	P175/75R13	P185/70R13
7.25-13	700-13	185-13	D78-13	P185/75R13	P205/70R13
5.90-14	645-14	155-14	B78-14	P175/75R14	P185/70R14
6.50-14	695-14	175-14	C78-14	P185/75R14	P195/70R14
7.00-14	735-14	185-14	E78-14	P195/75R14	P205/70R14
7.50-14	775-14	195-14	F78-14	P205/75R14	P215/70R14
8.00-14	825-14	205-14	G78-14	P215/75R14	P225/70R14
8.50-14	855-14	215-14	H78-14	P225/75R14	P235/70R14
5.90-15	600-15	165-15	A78-15	P165/75R15	P175/70R15
6.50-15	685-15	175-15	C78-15	P175/75R15	P185/70R15
6.40-15	735-15	185-15	E78-15	P195/75R15	P205/70R15
6.70-15	775-15	195-15	F78-15	P205/75R15	P215/70R15
7.10-15	825-15	205-15	G78-15	P215/75R15	P225/70R15
7.60-15	855-15	215-15	H78-15	P225/75R15	P235/70R15
8.00-15	885-15	230-15	J78-15	P225/75R15	P235/70R15
8.20-15	900-15	235-15	L78-15	P235/75R15	P255/70R15

Rating Symbol	Speed (KMH)	Speed (MPH)	Rating Symbol	Speed (KMH)	Speed (MPH)
B	50	31	P	150	93
C	60	37	Q	160	99
D	65	40	R	170	106
E	70	43	S	180	112
F	80	50	T	190	118
G	90	56	U	200	124
J	100	62	H	210	130
K	110	68	V	240	149
L	120	75	W*	270	168
M	130	81	Y*	300	185
N	140	87

Rating Symbol	Speed (KMH)	Speed (MPH)	Rating Symbol	Speed (KMH)	Speed (MPH)
B	50	31	P	150	93
C	60	37	Q	160	99
D	65	40	R	170	106
E	70	43	S	180	112
F	80	50	T	190	118
G	90	56	U	200	124
J	100	62	H	210	130
K	110	68	V	240	149
L	120	75	W*	270	168
M	130	81	Y*	300	185
N	140	87

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Rating Symbol	Speed (KMH)	Speed (MPH)	Rating Symbol	Speed (KMH)	Speed (MPH)
B	50	31	P	150	93
C	60	37	Q	160	99
D	65	40	R	170	106
E	70	43	S	180	112
F	80	50	T	190	118
G	90	56	U	200	124
J	100	62	H	210	130
K	110	68	V	240	149
L	120	75	W*	270	168
M	130	81	Y*	300	185
N	140	87