What's that Gear

What's that Gear!

Wheel diameter:	mm [includes tire]
RPM:
Chain Ring:
Cluster:
Hide REDS:	[ inefficent and high-wear gears ]
Hide YELLOWS:	[ marginal gears ]
Miles/hour:

Speed @ 80 rpm	Gear	Chain-inches	Development
10.8 Km/hr	32 - 30	28 inches	2.24 metres
12.0 Km/hr	32 - 27	31 inches	2.49 metres
13.5 Km/hr	32 - 24	35 inches	2.81 metres
15.4 Km/hr	32 - 21	40 inches	3.21 metres
17.0 Km/hr	32 - 19	44 inches	3.54 metres
19.0 Km/hr	32 - 17	49 inches	3.96 metres
21.5 Km/hr	32 - 15	56 inches	4.49 metres
23.1 Km/hr	32 - 14	60 inches	4.81 metres
24.9 Km/hr	32 - 13	64 inches	5.18 metres
26.9 Km/hr	32 - 12	70 inches	5.61 metres
16.2 Km/hr	48 - 30	42 inches	3.37 metres
18.0 Km/hr	48 - 27	46 inches	3.74 metres
20.2 Km/hr	48 - 24	52 inches	4.21 metres
23.1 Km/hr	48 - 21	60 inches	4.81 metres
25.5 Km/hr	48 - 19	66 inches	5.31 metres
28.5 Km/hr	48 - 17	74 inches	5.94 metres
32.3 Km/hr	48 - 15	84 inches	6.73 metres
34.6 Km/hr	48 - 14	90 inches	7.21 metres
37.3 Km/hr	48 - 13	97 inches	7.77 metres
40.4 Km/hr	48 - 12	105 inches	8.42 metres