Gear Configuration

Bicycle chainring icon for front gear configuration in gear ratio calculator

Chainring Configuration

Set number and teeth count of chainrings

Bicycle cassette cogs icon for rear gear configuration in gear ratio calculator

Cassette Configuration

Set number and teeth count of cassette cogs

Bicycle wheel and tire configuration icon for gear ratio calculator

Wheel Settings

Configure wheel size and tire size

mm
700mm + 25mm×2 = 750mm

Saved Configurations

Gear Ratio Comparison Table

Unit System:
Current Configuration
Gear Combination Gear Ratio Cadence Speed Comparison
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
50-11T 4.55
28.8
31.7
34.5
37.4
40.3
43.2
46.1
48.9
51.8
54.7
57.6
60.5
63.3
66.2
69.1
72.0
50-12T 4.17
26.4
29.0
31.7
34.3
36.9
39.6
42.2
44.9
47.5
50.1
52.8
55.4
58.1
60.7
63.3
66.0
50-13T 3.85
24.4
26.8
29.2
31.7
34.1
36.5
39.0
41.4
43.8
46.3
48.7
51.2
53.6
56.0
58.5
60.9
50-15T 3.33
21.1
23.2
25.3
27.4
29.6
31.7
33.8
35.9
38.0
40.1
42.2
44.3
46.4
48.6
50.7
52.8
50-17T 2.94
18.6
20.5
22.4
24.2
26.1
27.9
29.8
31.7
33.5
35.4
37.3
39.1
41.0
42.8
44.7
46.6
50-19T 2.63
16.7
18.3
20.0
21.7
23.3
25.0
26.7
28.3
30.0
31.7
33.3
35.0
36.7
38.3
40.0
41.7
50-21T 2.38
15.1
16.6
18.1
19.6
21.1
22.6
24.1
25.6
27.1
28.7
30.2
31.7
33.2
34.7
36.2
37.7
50-24T 2.08
13.2
14.5
15.8
17.2
18.5
19.8
21.1
22.4
23.8
25.1
26.4
27.7
29.0
30.3
31.7
33.0
50-28T 1.79
11.3
12.4
13.6
14.7
15.8
17.0
18.1
19.2
20.4
21.5
22.6
23.8
24.9
26.0
27.1
28.3
50-32T 1.56
9.9
10.9
11.9
12.9
13.9
14.8
15.8
16.8
17.8
18.8
19.8
20.8
21.8
22.8
23.8
24.7
34-11T 3.09
19.6
21.5
23.5
25.4
27.4
29.4
31.3
33.3
35.2
37.2
39.2
41.1
43.1
45.0
47.0
48.9
34-12T 2.83
17.9
19.7
21.5
23.3
25.1
26.9
28.7
30.5
32.3
34.1
35.9
37.7
39.5
41.3
43.1
44.9
34-13T 2.62
16.6
18.2
19.9
21.5
23.2
24.8
26.5
28.2
29.8
31.5
33.1
34.8
36.4
38.1
39.8
41.4
34-15T 2.27
14.4
15.8
17.2
18.7
20.1
21.5
23.0
24.4
25.8
27.3
28.7
30.1
31.6
33.0
34.5
35.9
34-17T 2.00
12.7
13.9
15.2
16.5
17.7
19.0
20.3
21.5
22.8
24.1
25.3
26.6
27.9
29.1
30.4
31.7
34-19T 1.79
11.3
12.5
13.6
14.7
15.9
17.0
18.1
19.3
20.4
21.5
22.7
23.8
24.9
26.1
27.2
28.3
34-21T 1.62
10.3
11.3
12.3
13.3
14.4
15.4
16.4
17.4
18.5
19.5
20.5
21.5
22.6
23.6
24.6
25.6
34-24T 1.42
9.0
9.9
10.8
11.7
12.6
13.5
14.4
15.3
16.2
17.0
17.9
18.8
19.7
20.6
21.5
22.4
34-28T 1.21
7.7
8.5
9.2
10.0
10.8
11.5
12.3
13.1
13.8
14.6
15.4
16.2
16.9
17.7
18.5
19.2
34-32T 1.06
6.7
7.4
8.1
8.7
9.4
10.1
10.8
11.4
12.1
12.8
13.5
14.1
14.8
15.5
16.2
16.8
Low-speed gear (<20 km/h)
Medium-speed gear (20-35 km/h)
High-speed gear (35-50 km/h)
Extreme-speed gear (>50 km/h)
Table Description: The table shows speeds for different chainring-cassette combinations at various cadences. Calculations include wheel size and tire thickness; wider tires increase actual wheel diameter and corresponding speed. Color coding helps quickly identify different speed range gears. Gear ratio = chainring teeth ÷ cassette teeth, higher values mean faster speeds. Each cell shows speed above and gear ratio below. Cadence is fixed at 50-125 RPM, displayed every 5 RPM.

Gear Knowledge

Learn about bicycle gear ratios and cycling performance