Marine Specialties - Goped Calculated Speed given RPM & Spindle Diameter

Spindle Diameter (in inches)
RPM	0.625	0.675	0.712	0.800	0.825	0.850	0.875
3,000	5.58	6.02	6.35	7.14	7.36	7.59	7.81
4,000	7.44	8.03	8.47	9.52	9.82	10.11	10.41
5,000	9.30	10.04	10.59	11.90	12.27	12.64	13.02
6,000	11.16	12.05	12.71	14.28	14.73	15.17	15.62
7,000	13.02	14.06	14.83	16.66	17.18	17.70	18.22
8,000	14.87	16.06	16.95	19.04	19.63	20.23	20.82
9,000	16.73	18.07	19.06	21.42	22.09	22.76	23.43
10,000	18.59	20.08	21.18	23.80	24.54	25.29	26.03
11,000	20.45	22.09	23.30	26.18	27.00	27.82	28.63
12,000	22.31	24.10	25.42	28.56	29.45	30.34	31.24
13,000	24.17	26.10	27.54	30.94	31.91	32.87	33.84
14,000	26.03	28.11	29.65	33.32	34.36	35.40	36.44
15,000	27.89	30.12	31.77	35.70	36.81	37.93	39.05
16,000	29.75	32.13	33.89	38.08	39.27	40.46	41.65
17,000	31.61	34.14	36.01	40.46	41.72	42.99	44.25
18,000	33.47	36.15	38.13	42.84	44.18	45.52	46.85
19,000	35.33	38.15	40.24	45.22	46.63	48.04	49.46
20,000	37.19	40.16	42.36	47.60	49.09	50.57	52.06
21,000	39.05	42.17	44.48	49.98	51.54	53.10	54.66
22,000	40.90	44.18	46.60	52.36	53.99	55.63	57.27
23,000	42.76	46.19	48.72	54.74	56.45	58.16	59.87
24,000	44.62	48.19	50.84	57.12	58.90	60.69	62.47
25,000	46.48	50.20	52.95	59.50	61.36	63.22	65.08
26,000	48.34	52.21	55.07	61.88	63.81	65.75	67.68
27,000	50.20	54.22	57.19	64.26	66.27	68.27	70.28
28,000	52.06	56.23	59.31	66.64	68.72	70.80	72.89
29,000	53.92	58.23	61.43	69.02	71.17	73.33	75.49
30,000	55.78	60.24	63.54	71.40	73.63	75.86	78.09

For immediate help or to place an order please write or call.

Marine Specialties
P.O. Box 19094
Houston, TX 77224-9094

713-468-6070 Phone
713-468-6072 Fax

Goped Calculated Speed
Speed in Miles Per Hour for a given Engine RPM and Spindle Diameter
These are theoretical speeds the actual speed will be less due to inefficiencies in the spindle to tire interface.
MPH = (RPM) x (Spindle Diameter in inches) x (.0029749)