Ejelta.com: Tire Size Calculator

This tire size calculator lets you check what you can replace your tires or wheels with without changing overall tire diameter or with some acceptable diameter change. The data presented here is in no way "official", please use common sense and check with manufacturer recommendations and other references.

Best Matches for 165/80-15 in 15", 16", 16.5", 17", 18".

Code	Width	Ratio	Wheel	Diameter	Wall,"	Wall,mm	Diam.Diff.	= 50mph	1000miles =
205/55-16.5	205	55	16.5	25.38	4.44	112.75	-0.06%	49.97	1,000.62
225/50-16.5	225	50	16.5	25.36	4.43	112.50	-0.14%	49.93	1,001.40
195/55-17	195	55	17	25.44	4.22	107.25	+0.20%	50.10	997.98
165/65-17	165	65	17	25.44	4.22	107.25	+0.20%	50.10	997.98
175/75-15	175	75	15	25.33	5.17	131.25	-0.23%	49.88	1,002.33
175/65-16.5	175	65	16.5	25.46	4.48	113.75	+0.25%	50.12	997.52
215/50-17	215	50	17	25.46	4.23	107.50	+0.28%	50.14	997.21
185/65-16	185	65	16	25.47	4.73	120.25	+0.29%	50.15	997.05
215/55-16	215	55	16	25.31	4.66	118.25	-0.33%	49.84	1,003.26
205/65-15	205	65	15	25.49	5.25	133.25	+0.39%	50.19	996.12
185/50-18	185	50	18	25.28	3.64	92.50	-0.43%	49.78	1,004.34
175/60-17	175	60	17	25.27	4.13	105.00	-0.50%	49.75	1,004.96
205/45-18	205	45	18	25.26	3.63	92.25	-0.51%	49.74	1,005.12
185/60-16.5	185	60	16.5	25.24	4.37	111.00	-0.60%	49.70	1,006.05
195/60-16	195	60	16	25.21	4.61	117.00	-0.71%	49.64	1,007.13
175/55-18	175	55	18	25.58	3.79	96.25	+0.73%	50.36	992.71
185/70-15	185	70	15	25.20	5.10	129.50	-0.78%	49.61	1,007.75
165/70-16.5	165	70	16.5	25.59	4.55	115.50	+0.79%	50.40	992.09
215/45-18	215	45	18	25.62	3.81	96.75	+0.88%	50.44	991.16
225/60-15	225	60	15	25.63	5.31	135.00	+0.93%	50.47	990.70
215/60-15	215	60	15	25.16	5.08	129.00	-0.93%	49.53	1,009.30
165/55-18	165	55	18	25.15	3.57	90.75	-0.98%	49.51	1,009.77
175/70-16	175	70	16	25.65	4.82	122.50	+0.99%	50.50	990.08
195/50-18	195	50	18	25.68	3.84	97.50	+1.12%	50.56	988.84
205/60-16	205	60	16	25.69	4.84	123.00	+1.15%	50.57	988.53
165/70-16	165	70	16	25.09	4.55	115.50	-1.18%	49.41	1,011.78
225/40-18	225	40	18	25.09	3.54	90.00	-1.21%	49.40	1,012.09
195/60-16.5	195	60	16.5	25.71	4.61	117.00	+1.26%	50.63	987.44
205/50-17	205	50	17	25.07	4.04	102.50	-1.27%	49.36	1,012.71
185/60-17	185	60	17	25.74	4.37	111.00	+1.36%	50.68	986.36
225/55-16	225	55	16	25.74	4.87	123.75	+1.38%	50.69	986.20
165/75-16	165	75	16	25.74	4.87	123.75	+1.38%	50.69	986.20
195/70-15	195	70	15	25.75	5.37	136.50	+1.40%	50.70	986.05
185/55-17	185	55	17	25.01	4.01	101.75	-1.50%	49.25	1,015.04
165/60-18	165	60	18	25.80	3.90	99.00	+1.58%	50.79	984.19
195/65-15	195	65	15	24.98	4.99	126.75	-1.63%	49.19	1,016.28
215/55-16.5	215	55	16.5	25.81	4.66	118.25	+1.64%	50.82	983.57
225/45-17	225	45	17	24.97	3.99	101.25	-1.66%	49.17	1,016.59
215/50-16.5	215	50	16.5	24.96	4.23	107.50	-1.69%	49.16	1,016.90
175/65-16	175	65	16	24.96	4.48	113.75	-1.72%	49.14	1,017.21
195/55-16.5	195	55	16.5	24.94	4.22	107.25	-1.77%	49.12	1,017.67
165/65-16.5	165	65	16.5	24.94	4.22	107.25	-1.77%	49.12	1,017.67
225/50-17	225	50	17	25.86	4.43	112.50	+1.83%	50.91	981.71
205/55-17	205	55	17	25.88	4.44	112.75	+1.91%	50.95	980.93
195/45-18	195	45	18	24.91	3.45	87.75	-1.91%	49.05	1,019.07
175/50-18	175	50	18	24.89	3.44	87.50	-1.98%	49.01	1,019.84

"= 50mph" - true speed when speedometer shows 50mph
"1000miles =" - odometer reading for actual 1000 miles

Click on [Show] to open charts and add wheel sizes to the matches table.

Ratio: 30 35 40 45 50 55 60 65 70 75 80 85

Wheel Size 15"

165 165/30-15
d=18.90
w=1.95
-25.58% 165/35-15
d=19.55
w=2.27
-23.02% 165/40-15
d=20.20
w=2.60
-20.47% 165/45-15
d=20.85
w=2.92
-17.91% 165/50-15
d=21.50
w=3.25
-15.35% 165/55-15
d=22.15
w=3.57
-12.79% 165/60-15
d=22.80
w=3.90
-10.23% 165/65-15
d=23.44
w=4.22
-7.67% 165/70-15
d=24.09
w=4.55
-5.12% 165/75-15
d=24.74
w=4.87
-2.56%

175 175/30-15
d=19.13
w=2.07
-24.65% 175/35-15
d=19.82
w=2.41
-21.94% 175/40-15
d=20.51
w=2.76
-19.22% 175/45-15
d=21.20
w=3.10
-16.51% 175/50-15
d=21.89
w=3.44
-13.80% 175/55-15
d=22.58
w=3.79
-11.09% 175/60-15
d=23.27
w=4.13
-8.37% 175/65-15
d=23.96
w=4.48
-5.66% 175/70-15
d=24.65
w=4.82
-2.95% 175/75-15
d=25.33
w=5.17
-0.23%

185 185/30-15
d=19.37
w=2.19
-23.72% 185/35-15
d=20.10
w=2.55
-20.85% 185/40-15
d=20.83
w=2.91
-17.98% 185/45-15
d=21.56
w=3.28
-15.12% 185/50-15
d=22.28
w=3.64
-12.25% 185/55-15
d=23.01
w=4.01
-9.38% 185/60-15
d=23.74
w=4.37
-6.51% 185/65-15
d=24.47
w=4.73
-3.64% 185/70-15
d=25.20
w=5.10
-0.78% 185/75-15
d=25.93
w=5.46
+2.09%

195 195/30-15
d=19.61
w=2.30
-22.79% 195/35-15
d=20.37
w=2.69
-19.77% 195/40-15
d=21.14
w=3.07
-16.74% 195/45-15
d=21.91
w=3.45
-13.72% 195/50-15
d=22.68
w=3.84
-10.70% 195/55-15
d=23.44
w=4.22
-7.67% 195/60-15
d=24.21
w=4.61
-4.65% 195/65-15
d=24.98
w=4.99
-1.63% 195/70-15
d=25.75
w=5.37
+1.40% 195/75-15
d=26.52
w=5.76
+4.42%

205 205/30-15
d=19.84
w=2.42
-21.86% 205/35-15
d=20.65
w=2.82
-18.68% 205/40-15
d=21.46
w=3.23
-15.50% 205/45-15
d=22.26
w=3.63
-12.33% 205/50-15
d=23.07
w=4.04
-9.15% 205/55-15
d=23.88
w=4.44
-5.97% 205/60-15
d=24.69
w=4.84
-2.79% 205/65-15
d=25.49
w=5.25
+0.39% 205/70-15
d=26.30
w=5.65
+3.57% 205/75-15
d=27.11
w=6.05
+6.74%

215 215/30-15
d=20.08
w=2.54
-20.93% 215/35-15
d=20.93
w=2.96
-17.60% 215/40-15
d=21.77
w=3.39
-14.26% 215/45-15
d=22.62
w=3.81
-10.93% 215/50-15
d=23.46
w=4.23
-7.60% 215/55-15
d=24.31
w=4.66
-4.26% 215/60-15
d=25.16
w=5.08
-0.93% 215/65-15
d=26.00
w=5.50
+2.40% 215/70-15
d=26.85
w=5.93
+5.74% 215/75-15
d=27.70
w=6.35
+9.07%

225 225/30-15
d=20.31
w=2.66
-20.00% 225/35-15
d=21.20
w=3.10
-16.51% 225/40-15
d=22.09
w=3.54
-13.02% 225/45-15
d=22.97
w=3.99
-9.53% 225/50-15
d=23.86
w=4.43
-6.05% 225/55-15
d=24.74
w=4.87
-2.56% 225/60-15
d=25.63
w=5.31
+0.93% 225/65-15
d=26.52
w=5.76
+4.42% 225/70-15
d=27.40
w=6.20
+7.91% 225/75-15
d=28.29
w=6.64
+11.40%

Wheel Size 16" [Show] [Hide]

165 165/30-16
d=19.90
w=1.95
-21.64% 165/35-16
d=20.55
w=2.27
-19.09% 165/40-16
d=21.20
w=2.60
-16.53% 165/45-16
d=21.85
w=2.92
-13.97% 165/50-16
d=22.50
w=3.25
-11.41% 165/55-16
d=23.15
w=3.57
-8.85% 165/60-16
d=23.80
w=3.90
-6.29% 165/65-16
d=24.44
w=4.22
-3.74% 165/70-16
d=25.09
w=4.55
-1.18% 165/75-16
d=25.74
w=4.87
+1.38%

175 175/30-16
d=20.13
w=2.07
-20.71% 175/35-16
d=20.82
w=2.41
-18.00% 175/40-16
d=21.51
w=2.76
-15.29% 175/45-16
d=22.20
w=3.10
-12.57% 175/50-16
d=22.89
w=3.44
-9.86% 175/55-16
d=23.58
w=3.79
-7.15% 175/60-16
d=24.27
w=4.13
-4.43% 175/65-16
d=24.96
w=4.48
-1.72% 175/70-16
d=25.65
w=4.82
+0.99% 175/75-16
d=26.33
w=5.17
+3.71%

185 185/30-16
d=20.37
w=2.19
-19.78% 185/35-16
d=21.10
w=2.55
-16.91% 185/40-16
d=21.83
w=2.91
-14.05% 185/45-16
d=22.56
w=3.28
-11.18% 185/50-16
d=23.28
w=3.64
-8.31% 185/55-16
d=24.01
w=4.01
-5.44% 185/60-16
d=24.74
w=4.37
-2.57% 185/65-16
d=25.47
w=4.73
+0.29% 185/70-16
d=26.20
w=5.10
+3.16% 185/75-16
d=26.93
w=5.46
+6.03%

195 195/30-16
d=20.61
w=2.30
-18.85% 195/35-16
d=21.37
w=2.69
-15.83% 195/40-16
d=22.14
w=3.07
-12.81% 195/45-16
d=22.91
w=3.45
-9.78% 195/50-16
d=23.68
w=3.84
-6.76% 195/55-16
d=24.44
w=4.22
-3.74% 195/60-16
d=25.21
w=4.61
-0.71% 195/65-16
d=25.98
w=4.99
+2.31% 195/70-16
d=26.75
w=5.37
+5.33% 195/75-16
d=27.52
w=5.76
+8.36%

205 205/30-16
d=20.84
w=2.42
-17.92% 205/35-16
d=21.65
w=2.82
-14.74% 205/40-16
d=22.46
w=3.23
-11.57% 205/45-16
d=23.26
w=3.63
-8.39% 205/50-16
d=24.07
w=4.04
-5.21% 205/55-16
d=24.88
w=4.44
-2.03% 205/60-16
d=25.69
w=4.84
+1.15% 205/65-16
d=26.49
w=5.25
+4.33% 205/70-16
d=27.30
w=5.65
+7.50% 205/75-16
d=28.11
w=6.05
+10.68%

215 215/30-16
d=21.08
w=2.54
-16.99% 215/35-16
d=21.93
w=2.96
-13.66% 215/40-16
d=22.77
w=3.39
-10.33% 215/45-16
d=23.62
w=3.81
-6.99% 215/50-16
d=24.46
w=4.23
-3.66% 215/55-16
d=25.31
w=4.66
-0.33% 215/60-16
d=26.16
w=5.08
+3.01% 215/65-16
d=27.00
w=5.50
+6.34% 215/70-16
d=27.85
w=5.93
+9.67% 215/75-16
d=28.70
w=6.35
+13.01%

225 225/30-16
d=21.31
w=2.66
-16.06% 225/35-16
d=22.20
w=3.10
-12.57% 225/40-16
d=23.09
w=3.54
-9.09% 225/45-16
d=23.97
w=3.99
-5.60% 225/50-16
d=24.86
w=4.43
-2.11% 225/55-16
d=25.74
w=4.87
+1.38% 225/60-16
d=26.63
w=5.31
+4.87% 225/65-16
d=27.52
w=5.76
+8.36% 225/70-16
d=28.40
w=6.20
+11.84% 225/75-16
d=29.29
w=6.64
+15.33%

Wheel Size 16.5" [Show] [Hide]

Wheel Size 17" [Show] [Hide]

165 165/30-17
d=20.90
w=1.95
-17.71% 165/35-17
d=21.55
w=2.27
-15.15% 165/40-17
d=22.20
w=2.60
-12.59% 165/45-17
d=22.85
w=2.92
-10.03% 165/50-17
d=23.50
w=3.25
-7.47% 165/55-17
d=24.15
w=3.57
-4.91% 165/60-17
d=24.80
w=3.90
-2.36% 165/65-17
d=25.44
w=4.22
+0.20% 165/70-17
d=26.09
w=4.55
+2.76% 165/75-17
d=26.74
w=4.87
+5.32%

175 175/30-17
d=21.13
w=2.07
-16.78% 175/35-17
d=21.82
w=2.41
-14.06% 175/40-17
d=22.51
w=2.76
-11.35% 175/45-17
d=23.20
w=3.10
-8.64% 175/50-17
d=23.89
w=3.44
-5.92% 175/55-17
d=24.58
w=3.79
-3.21% 175/60-17
d=25.27
w=4.13
-0.50% 175/65-17
d=25.96
w=4.48
+2.22% 175/70-17
d=26.65
w=4.82
+4.93% 175/75-17
d=27.33
w=5.17
+7.64%

185 185/30-17
d=21.37
w=2.19
-15.84% 185/35-17
d=22.10
w=2.55
-12.98% 185/40-17
d=22.83
w=2.91
-10.11% 185/45-17
d=23.56
w=3.28
-7.24% 185/50-17
d=24.28
w=3.64
-4.37% 185/55-17
d=25.01
w=4.01
-1.50% 185/60-17
d=25.74
w=4.37
+1.36% 185/65-17
d=26.47
w=4.73
+4.23% 185/70-17
d=27.20
w=5.10
+7.10% 185/75-17
d=27.93
w=5.46
+9.97%

195 195/30-17
d=21.61
w=2.30
-14.91% 195/35-17
d=22.37
w=2.69
-11.89% 195/40-17
d=23.14
w=3.07
-8.87% 195/45-17
d=23.91
w=3.45
-5.84% 195/50-17
d=24.68
w=3.84
-2.82% 195/55-17
d=25.44
w=4.22
+0.20% 195/60-17
d=26.21
w=4.61
+3.22% 195/65-17
d=26.98
w=4.99
+6.25% 195/70-17
d=27.75
w=5.37
+9.27% 195/75-17
d=28.52
w=5.76
+12.29%

205 205/30-17
d=21.84
w=2.42
-13.98% 205/35-17
d=22.65
w=2.82
-10.81% 205/40-17
d=23.46
w=3.23
-7.63% 205/45-17
d=24.26
w=3.63
-4.45% 205/50-17
d=25.07
w=4.04
-1.27% 205/55-17
d=25.88
w=4.44
+1.91% 205/60-17
d=26.69
w=4.84
+5.09% 205/65-17
d=27.49
w=5.25
+8.26% 205/70-17
d=28.30
w=5.65
+11.44% 205/75-17
d=29.11
w=6.05
+14.62%

215 215/30-17
d=22.08
w=2.54
-13.05% 215/35-17
d=22.93
w=2.96
-9.72% 215/40-17
d=23.77
w=3.39
-6.39% 215/45-17
d=24.62
w=3.81
-3.05% 215/50-17
d=25.46
w=4.23
+0.28% 215/55-17
d=26.31
w=4.66
+3.61% 215/60-17
d=27.16
w=5.08
+6.95% 215/65-17
d=28.00
w=5.50
+10.28% 215/70-17
d=28.85
w=5.93
+13.61% 215/75-17
d=29.70
w=6.35
+16.95%

225 225/30-17
d=22.31
w=2.66
-12.12% 225/35-17
d=23.20
w=3.10
-8.64% 225/40-17
d=24.09
w=3.54
-5.15% 225/45-17
d=24.97
w=3.99
-1.66% 225/50-17
d=25.86
w=4.43
+1.83% 225/55-17
d=26.74
w=4.87
+5.32% 225/60-17
d=27.63
w=5.31
+8.81% 225/65-17
d=28.52
w=5.76
+12.29% 225/70-17
d=29.40
w=6.20
+15.78% 225/75-17
d=30.29
w=6.64
+19.27%

Wheel Size 18" [Show] [Hide]

Thanx:
   Mark Sink's tire calculator -- for the idea and reference numbers
   Tirerack.com -- for quick and reliable service
   Mike.S -- for inspiration :)
   XAO::Web -- for bells and whistles that allowed to create this page in about an hour

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