|
Smart Cycling
Bike Shop,
Inc.
Track
Gearing by Development Chart
|
Chainring
Size |
45 |
46 |
47 |
45 |
48 |
46 |
49 |
47 |
|
|
Cog Size |
18 |
18 |
18 |
17 |
18 |
17 |
18 |
17 |
|
|
Metric
Development |
5.30 |
5.42 |
5.54 |
5.61 |
5.65 |
5.74 |
5.77 |
5.86 |
| |
English
Development |
17.40 |
17.78 |
18.17 |
18.42 |
18.56 |
18.83 |
18.94 |
19.24 |
| |
Gear
Inches |
66.45 |
67.92 |
69.40 |
70.36 |
70.88 |
71.92 |
72.35 |
73.48 |
|
Chainring
Size |
50 |
45 |
48 |
51 |
46 |
49 |
52 |
47 |
|
|
Cog Size |
18 |
16 |
17 |
18 |
16 |
17 |
18 |
16 |
| |
Metric
Development |
5.89 |
5.96 |
5.99 |
6.01 |
6.10 |
6.11 |
6.12 |
6.23 |
| |
English
Development |
19.33 |
19.57 |
19.65 |
19.72 |
20.01 |
20.06 |
20.10 |
20.44 |
| |
Gear
Inches |
73.83 |
74.75 |
75.05 |
75.31 |
76.41 |
76.61 |
76.78 |
78.08 |
|
Chainring
Size |
50 |
53 |
45 |
48 |
51 |
52 |
49 |
46 |
|
|
Cog Size |
17 |
18 |
15 |
16 |
17 |
17 |
16 |
15 |
| |
Metric
Development |
6.24 |
6.24 |
6.36 |
6.36 |
6.36 |
6.48 |
6.49 |
6.50 |
| |
English
Development |
20.47 |
20.49 |
20.88 |
20.88 |
20.88 |
21.28 |
21.31 |
21.34 |
| |
Gear
Inches |
78.17 |
78.26 |
79.74 |
79.74 |
79.74 |
81.30 |
81.40 |
81.51 |
|
Chainring
Size |
53 |
50 |
47 |
51 |
48 |
45 |
52 |
49 |
|
|
Cog Size |
17 |
16 |
15 |
16 |
15 |
14 |
16 |
15 |
| |
Metric
Development |
6.61 |
6.63 |
6.64 |
6.76 |
6.78 |
6.81 |
6.89 |
6.93 |
| |
English
Development |
21.69 |
21.74 |
21.80 |
22.18 |
22.27 |
22.37 |
22.61 |
22.73 |
| |
Gear
Inches |
82.86 |
83.06 |
83.28 |
84.72 |
85.05 |
85.43 |
86.38 |
86.82 |
|
Chainring
Size |
46 |
53 |
50 |
47 |
51 |
48 |
45 |
52 |
|
|
Cog Size |
14 |
16 |
15 |
14 |
15 |
14 |
13 |
15 |
| |
Metric
Development |
6.97 |
7.02 |
7.07 |
7.12 |
7.21 |
7.27 |
7.34 |
7.35 |
| |
English
Development |
22.86 |
23.05 |
23.19 |
23.36 |
23.66 |
23.86 |
24.09 |
24.12 |
| |
Gear
Inches |
87.33 |
88.04 |
88.60 |
89.23 |
90.37 |
91.13 |
92.00 |
92.14 |
|
Chainring
Size |
49 |
53 |
46 |
50 |
47 |
51 |
48 |
52 |
|
|
Cog Size |
14 |
15 |
13 |
14 |
13 |
14 |
13 |
14 |
| |
Metric
Development |
7.42 |
7.49 |
7.50 |
7.57 |
7.66 |
7.72 |
7.83 |
7.87 |
| |
English
Development |
24.35 |
24.59 |
24.62 |
24.85 |
25.16 |
25.35 |
25.69 |
25.85 |
| |
Gear
Inches |
93.03 |
93.91 |
94.05 |
94.93 |
96.09 |
96.82 |
98.14 |
98.72 |
|
Chainring
Size |
45 |
49 |
53 |
46 |
50 |
47 |
51 |
52 |
|
|
Cog Size |
12 |
13 |
14 |
12 |
13 |
12 |
13 |
13 |
| |
Metric
Development |
7.95 |
7.99 |
8.03 |
8.13 |
8.15 |
8.30 |
8.32 |
8.48 |
| |
English
Development |
26.09 |
26.23 |
26.34 |
26.67 |
26.76 |
27.25 |
27.30 |
27.83 |
| |
Gear
Inches |
99.67 |
100.18 |
100.62 |
101.89 |
102.23 |
104.10 |
104.27 |
106.32 |
|
Chainring
Size |
48 |
53 |
49 |
45 |
50 |
46 |
51 |
47 |
|
|
Cog Size |
12 |
13 |
12 |
11 |
12 |
11 |
12 |
11 |
| |
Metric
Development |
8.48 |
8.64 |
8.66 |
8.67 |
8.83 |
8.87 |
9.01 |
9.06 |
| |
English
Development |
27.83 |
28.37 |
28.41 |
28.47 |
28.99 |
29.10 |
29.57 |
29.73 |
| |
Gear
Inches |
106.32 |
108.36 |
108.53 |
108.73 |
110.75 |
111.15 |
112.96 |
113.56 |
|
Chainring
Size |
52 |
48 |
53 |
49 |
50 |
51 |
52 |
53 |
|
|
Cog Size |
12 |
11 |
12 |
11 |
11 |
11 |
11 |
11 |
| |
Metric
Development |
9.19 |
9.25 |
9.36 |
9.44 |
9.64 |
9.83 |
10.02 |
10.21 |
| |
English
Development |
30.15 |
30.36 |
30.73 |
31.00 |
31.63 |
32.26 |
32.89 |
33.53 |
| |
Gear
Inches |
115.18 |
115.98 |
117.39 |
118.40 |
120.81 |
123.23 |
125.65 |
128.06 |
|
*
Development determined using a standard wheel equipped
with a 700c x 23 tubular tire inflated to 140 psi on a
level asphalt surface, under the load of a 175lb rider. |
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Contact Us
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Smart
Cycling Bike Shop, Inc.
1882 Johns Drive
Glenview, IL 60025
Telephone (847) 998-0200
Fax (847) 998-0201
smartcyclinginc@sbcglobal.net |
