Enter your sprocket details

Common Chain Sizes
	English (inches)		Metric (mm's)
ANSI	Pitch	Roller Diameter	Pitch	Roller Diameter
25	0.25	0.13	6.35	3.302
35	0.375	0.2	9.525	5.08
40	0.5	0.3125	12.7	7.9375
41	0.5	0.306	12.7	7.7724
50	0.625	0.4	15.875	10.16
60	0.75	0.46875	19.05	11.90625
80	1	0.625	25.4	15.875
Bicycle	0.5	0.3125	12.7	7.9375
Bike 420	0.5	0.3125	12.7	7.9375
Bike 425	0.5	0.3125	12.7	7.9375
Bike 428	0.5	0.335	12.7	8.509
Bike 520	0.625	0.4	15.875	10.16
Bike 525	0.625	0.4	15.875	10.16
Bike 530	0.625	0.4	15.875	10.16
Bike 630	0.75	0.46875	19.05	11.90625