|
|
GEAR RATIOS
BY Jason P. Laskowski
Technical Editor
Here's a chart to help figure out gear ratios at the track or
in the garage without busting out the calculator or scribbling on a piece of
paper.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
FRONT SPROCKET
|
|
REAR SPROCKET
|
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
19
|
20
|
21
|
22
|
23
|
|
9
|
1.00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
10
|
1.11
|
1.00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
11
|
1.22
|
1.10
|
1.00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
12
|
1.33
|
1.20
|
1.09
|
1.00
|
|
|
|
|
|
|
|
|
|
|
|
|
13
|
1.44
|
1.30
|
1.18
|
1.08
|
1.00
|
|
|
|
|
|
|
|
|
|
|
|
14
|
1.56
|
1.40
|
1.27
|
1.17
|
1.08
|
1.00
|
|
|
|
|
|
|
|
|
|
|
15
|
1.67
|
1.50
|
1.36
|
1.25
|
1.15
|
1.07
|
1.00
|
|
|
|
|
|
|
|
|
|
16
|
1.78
|
1.60
|
1.45
|
1.33
|
1.23
|
1.14
|
1.07
|
1.00
|
|
|
|
|
|
|
|
|
17
|
1.89
|
1.70
|
1.55
|
1.42
|
1.31
|
1.21
|
1.13
|
1.06
|
1.00
|
|
|
|
|
|
|
|
18
|
2.00
|
1.80
|
1.64
|
1.50
|
1.38
|
1.29
|
1.20
|
1.13
|
1.06
|
1.00
|
|
|
|
|
|
|
19
|
2.11
|
1.90
|
1.73
|
1.58
|
1.46
|
1.36
|
1.27
|
1.19
|
1.12
|
1.06
|
1.00
|
|
|
|
|
|
20
|
2.22
|
2.00
|
1.82
|
1.67
|
1.54
|
1.43
|
1.33
|
1.25
|
1.18
|
1.11
|
1.05
|
1.00
|
|
|
|
|
21
|
2.33
|
2.10
|
1.91
|
1.75
|
1.62
|
1.50
|
1.40
|
1.31
|
1.24
|
1.17
|
1.11
|
1.05
|
1.00
|
|
|
|
22
|
2.44
|
2.20
|
2.00
|
1.83
|
1.69
|
1.57
|
1.47
|
1.38
|
1.29
|
1.22
|
1.16
|
1.10
|
1.05
|
1.00
|
|
|
23
|
2.56
|
2.30
|
2.09
|
1.92
|
1.77
|
1.64
|
1.53
|
1.44
|
1.35
|
1.28
|
1.21
|
1.15
|
1.10
|
1.05
|
1.00
|
|
24
|
2.67
|
2.40
|
2.18
|
2.00
|
1.85
|
1.71
|
1.60
|
1.50
|
1.41
|
1.33
|
1.26
|
1.20
|
1.14
|
1.09
|
1.04
|
|
25
|
2.78
|
2.50
|
2.27
|
2.08
|
1.92
|
1.79
|
1.67
|
1.56
|
1.47
|
1.39
|
1.32
|
1.25
|
1.19
|
1.14
|
1.09
|
|
26
|
2.89
|
2.60
|
2.36
|
2.17
|
2.00
|
1.86
|
1.73
|
1.63
|
1.53
|
1.44
|
1.37
|
1.30
|
1.24
|
1.18
|
1.13
|
|
27
|
3.00
|
2.70
|
2.45
|
2.25
|
2.08
|
1.93
|
1.80
|
1.69
|
1.59
|
1.50
|
1.42
|
1.35
|
1.29
|
1.23
|
1.17
|
|
28
|
3.11
|
2.80
|
2.55
|
2.33
|
2.15
|
2.00
|
1.87
|
1.75
|
1.65
|
1.56
|
1.47
|
1.40
|
1.33
|
1.27
|
1.22
|
|
29
|
3.22
|
2.90
|
2.64
|
2.42
|
2.23
|
2.07
|
1.93
|
1.81
|
1.71
|
1.61
|
1.53
|
1.45
|
1.38
|
1.32
|
1.26
|
|
30
|
3.33
|
3.00
|
2.73
|
2.50
|
2.31
|
2.14
|
2.00
|
1.88
|
1.76
|
1.67
|
1.58
|
1.50
|
1.43
|
1.36
|
1.30
|
|
31
|
3.44
|
3.10
|
2.82
|
2.58
|
2.38
|
2.21
|
2.07
|
1.94
|
1.82
|
1.72
|
1.63
|
1.55
|
1.48
|
1.41
|
1.35
|
|
32
|
3.56
|
3.20
|
2.91
|
2.67
|
2.46
|
2.29
|
2.13
|
2.00
|
1.88
|
1.78
|
1.68
|
1.60
|
1.52
|
1.45
|
1.39
|
|
33
|
3.67
|
3.30
|
3.00
|
2.75
|
2.54
|
2.36
|
2.20
|
2.06
|
1.94
|
1.83
|
1.74
|
1.65
|
1.57
|
1.50
|
1.43
|
|
34
|
3.78
|
3.40
|
3.09
|
2.83
|
2.62
|
2.43
|
2.27
|
2.13
|
2.00
|
1.89
|
1.79
|
1.70
|
1.62
|
1.55
|
1.48
|
|
35
|
3.89
|
3.50
|
3.18
|
2.92
|
2.69
|
2.50
|
2.33
|
2.19
|
2.06
|
1.94
|
1.84
|
1.75
|
1.67
|
1.59
|
1.52
|
|
36
|
4.00
|
3.60
|
3.27
|
3.00
|
2.77
|
2.57
|
2.40
|
2.25
|
2.12
|
2.00
|
1.89
|
1.80
|
1.71
|
1.64
|
1.57
|
|
37
|
4.11
|
3.70
|
3.36
|
3.08
|
2.85
|
2.64
|
2.47
|
2.31
|
2.18
|
2.06
|
1.95
|
1.85
|
1.76
|
1.68
|
1.61
|
|
38
|
4.22
|
3.80
|
3.45
|
3.17
|
2.92
|
2.71
|
2.53
|
2.38
|
2.24
|
2.11
|
2.00
|
1.90
|
1.81
|
1.73
|
1.65
|
|
39
|
4.33
|
3.90
|
3.55
|
3.25
|
3.00
|
2.79
|
2.60
|
2.44
|
2.29
|
2.17
|
2.05
|
1.95
|
1.86
|
1.77
|
1.70
|
|
40
|
4.44
|
4.00
|
3.64
|
3.33
|
3.08
|
2.86
|
2.67
|
2.50
|
2.35
|
2.22
|
2.11
|
2.00
|
1.90
|
1.82
|
1.74
|
|
41
|
4.56
|
4.10
|
3.73
|
3.42
|
3.15
|
2.93
|
2.73
|
2.56
|
2.41
|
2.28
|
2.16
|
2.05
|
1.95
|
1.86
|
1.78
|
|
42
|
4.67
|
4.20
|
3.82
|
3.50
|
3.23
|
3.00
|
2.80
|
2.63
|
2.47
|
2.33
|
2.21
|
2.10
|
2.00
|
1.91
|
1.83
|
|
43
|
4.78
|
4.30
|
3.91
|
3.58
|
3.31
|
3.07
|
2.87
|
2.69
|
2.53
|
2.39
|
2.26
|
2.15
|
2.05
|
1.95
|
1.87
|
|
44
|
4.89
|
4.40
|
4.00
|
3.67
|
3.38
|
3.14
|
2.93
|
2.75
|
2.59
|
2.44
|
2.32
|
2.20
|
2.10
|
2.00
|
1.91
|
|
45
|
5.00
|
4.50
|
4.09
|
3.75
|
3.46
|
3.21
|
3.00
|
2.81
|
2.65
|
2.50
|
2.37
|
2.25
|
2.14
|
2.05
|
1.96
|
|
46
|
5.11
|
4.60
|
4.18
|
3.83
|
3.54
|
3.29
|
3.07
|
2.88
|
2.71
|
2.56
|
2.42
|
2.30
|
2.19
|
2.09
|
2.00
|
|
47
|
5.22
|
4.70
|
4.27
|
3.92
|
3.62
|
3.36
|
3.13
|
2.94
|
2.76
|
2.61
|
2.47
|
2.35
|
2.24
|
2.14
|
2.04
|
|
48
|
5.33
|
4.80
|
4.36
|
4.00
|
3.69
|
3.43
|
3.20
|
3.00
|
2.82
|
2.67
|
2.53
|
2.40
|
2.29
|
2.18
|
2.09
|
|
49
|
5.44
|
4.90
|
4.45
|
4.08
|
3.77
|
3.50
|
3.27
|
3.06
|
2.88
|
2.72
|
2.58
|
2.45
|
2.33
|
2.23
|
2.13
|
|
50
|
5.56
|
5.00
|
4.55
|
4.17
|
3.85
|
3.57
|
3.33
|
3.13
|
2.94
|
2.78
|
2.63
|
2.50
|
2.38
|
2.27
|
2.17
|
|
51
|
5.67
|
5.10
|
4.64
|
4.25
|
3.92
|
3.64
|
3.40
|
3.19
|
3.00
|
2.83
|
2.68
|
2.55
|
2.43
|
2.32
|
2.22
|
|
52
|
5.78
|
5.20
|
4.73
|
4.33
|
4.00
|
3.71
|
3.47
|
3.25
|
3.06
|
2.89
|
2.74
|
2.60
|
2.48
|
2.36
|
2.26
|
|
53
|
5.89
|
5.30
|
4.82
|
4.42
|
4.08
|
3.79
|
3.53
|
3.31
|
3.12
|
2.94
|
2.79
|
2.65
|
2.52
|
2.41
|
2.30
|
|
54
|
6.00
|
5.40
|
4.91
|
4.50
|
4.15
|
3.86
|
3.60
|
3.38
|
3.18
|
3.00
|
2.84
|
2.70
|
2.57
|
2.45
|
2.35
|
|
55
|
6.11
|
5.50
|
5.00
|
4.58
|
| | |
