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OPTIMAL GEARING ROLLOUT

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"Sew Ups" Rollout Gearing Chart
Sprocket	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48
Freewheel 14	46.1	47.5	48.9	50.3	51.6	53	54.3	55.7	57	58.4	59.8	61.1	62.5	63.9	65.2
Freewheel 15	43	44.3	45.6	46.9	48.2	49.4	50.7	52	53.2	54.5	55.8	57	58.3	59.6	60.9
Freewheel 16	40.3	41.6	42.8	43.9	45.2	46.3	47.5	48.8	50	51.1	52.3	53.5	54.7	55.8	57
Freewheel 17	38	39.1	40.5	41.4	42.5	43.6	44.7	45.9	47	48.1	49.2	50.3	51.4	52.5	53.7
Freewheel 18	35.9	36.8	38	39.1	40.1	41.2	42.2	43.3	44.4	45.4	46.5	47.5	48.6	49.6	50.7

20" x 1.125" Rollout Gearing Chart
Sprocket	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48
Freewheel 14	48.6	50	51.4	52.8	54.3	55.7	57.7	58.6	60	61.4	62.8	64.3	65.7	67.1	68.6
Freewheel 15	45.3	46.7	48	49.3	50.7	52	53.3	54.7	56	57.3	58.7	60	61.3	62.7	64
Freewheel 16	42.5	43.8	45.5	46.2	47.5	48.7	50	51.2	52.5	53.7	55	56.2	57.5	58.7	60
Freewheel 17	40	41.2	42.3	43.5	44.7	45.9	47	48.2	49.4	50.6	51.8	52.9	54.1	55.3	56.5
Freewheel 18	37.7	38.8	40	41.1	42.2	43.3	44.4	45.6	46.7	47.8	48.9	50	51.1	52.2	53.3

20" x 1.375" Rollout Gearing Chart
Sprocket	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48
Freewheel 14	51	52.5	54	55.5	57	58.5	60	61.5	63	64.5	66	67.5	69	70.5	72
Freewheel 15	47.6	49	50	51.8	53.2	54.6	56	57.4	58.8	60.2	61.6	63	64.4	65.8	67.2
Freewheel 16	44.6	45.9	47.3	48.6	49.9	51.2	52.5	53.9	55.2	56.5	57.8	59.1	60.4	61.7	63
Freewheel 17	42	43.2	44.5	45.7	47	48.2	49.4	50.7	51.9	53.2	54.4	55.6	56.9	58.1	59.3
Freewheel 18	39.7	40.7	42	43.2	44.4	45.5	46.7	47.9	49	50.2	51.4	52.5	53.7	54.9	56

20" x 1.50" Rollout Gearing Chart
Sprocket	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48
Freewheel 14	46.8	48.1	49.5	50.9	52.3	53.6	55.5	56.4	57.7	59.1	60.5	61.8	63.2	64.6	66
Freewheel 15	43.6	44.9	46.2	47.4	48.8	50.1	51.3	52.6	53.9	55.2	56.5	57.7	59.1	60.2	61.6
Freewheel 16	40.9	42.1	43.3	44.5	45.7	46.9	48.1	49.3	50.5	51.7	52.9	54.1	55.3	56.6	57.7
Freewheel 17	38.5	39.6	40.8	41.9	43.1	44.1	45.2	46.4	47.5	48.7	49.8	51	52.2	53.1	54.3
Freewheel 18	36.4	37.4	38.5	39.6	40.6	41.7	42.8	43.9	44.9	46	47	48.1	49.2	50.3	51.3

20" x 1.75" Rollout Gearing Chart
Sprocket	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48
Freewheel 14	47.4	48.7	50.2	51.6	53	54.4	55.7	57.1	58.5	59.9	61.3	62.7	64.1	65.5	66.9
Freewheel 15	44.3	45.4	46.8	48.1	49.4	50.7	52	53.3	54.6	55.9	57.2	58.5	59.8	61.1	62.4
Freewheel 16	41.5	42.7	43.9	45.1	46.3	47.5	48.8	50	51.2	52.4	53.7	54.9	56.1	57.3	58.5
Freewheel 17	39	40.2	41.3	42.5	43.6	44.7	45.9	47	48.2	49.4	50.5	51.7	52.8	53.9	55.1
Freewheel 18	36.8	37.8	39	40.1	41.2	42.3	43.3	44.4	45.5	46.6	47.7	48.8	49.9	51	52

24" x 1.125" Rollout Gearing Chart
Sprocket	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48
Freewheel 14	54.9	56.5	58.1	59.7	61.3	63.1	64.7	66.3	67.9	69.4	71	72.6	74.4	76	77.5
Freewheel 15	51.3	52.8	54.3	55.8	57.3	58.8	60.3	61.8	63.3	64.9	66.3	67.9	69.4	70.8	72.4
Freewheel 16	48.1	49.5	50.9	52.3	53.7	55.1	56.6	57.9	59.5	60.8	62.2	63.9	65.1	66.5	67.9
Freewheel 17	45.2	46.6	47.9	49.3	50.6	51.9	53.2	54.6	55.9	57.2	58.6	59.9	61.3	62.4	63.8
Freewheel 18	42.7	43.9	45.2	46.6	47.7	49.1	50.3	51.5	52.8	54	55.3	56.6	57.9	59	60.4

24" x 1.375" Rollout Gearing Chart
Sprocket	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48
Freewheel 14	58.3	60	61.7	63.3	65	66.9	68.6	70.3	72	73.7	75.3	77	78.9	80.6	82.3
Freewheel 15	54.5	56	57.6	59.3	60.7	62.4	64.1	65.5	67.2	68.9	70.3	72	73.7	75.1	76.8
Freewheel 16	51	52.5	54	55.5	57	58.5	60	61.4	63.1	64.5	66.6	67.4	69.1	70.5	72
Freewheel 17	48	49.4	50.8	52.2	53.6	55.1	56.5	57.9	59.3	60.7	62.1	63.6	65	66.2	67.7
Freewheel 18	45.3	46.5	48	49.4	50.7	52	53.3	54.7	56	57.3	58.5	60	61.4	62.6	64.1

24" x 1.50" Rollout Gearing Chart
Sprocket	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48
Freewheel 14	55.9	57.5	59.1	60.7	62.3	64.2	65.8	67.4	69	70.6	72.2	73.8	75.7	77.3	78.9
Freewheel 15	52.1	53.7	55.2	56.7	58.2	59.8	61.3	62.8	64.4	65.9	67.4	69	70.6	72	73.6
Freewheel 16	48.8	50.3	51.8	53.2	54.6	56	57.5	58.9	60.3	61.8	63.2	64.6	66.2	67.6	69
Freewheel 17	46	47.3	48.7	50	51.4	52.8	54.1	55.5	56.8	58.8	59.5	60.8	62.3	63.5	64.8
Freewheel 18	43.4	44.7	46	47.2	48.5	49.8	51.1	52.4	53.7	54.9	56.2	57.5	58.9	60	61.4

24" x 1.75" Rollout Gearing Chart
Sprocket	34	35	36	37	38	39	40	41	42	43	44	45	46	47	48
Freewheel 14	58.3	60	61.7	63.3	65	66.9	68.6	70.3	72	73.7	75.3	77	78.9	80.6	82.3
Freewheel 15	54.4	56	57.6	59.3	60.7	62.4	64.1	65.5	67.2	68.9	70.3	72	73.7	75.1	76.8
Freewheel 16	51	52.5	54	55.5	57	58.5	60	61.4	63.1	64.5	66	67.4	69.1	70.5	72
Freewheel 17	48	49.4	50.8	52.2	53.6	55.1	56.5	57.9	59.3	60.7	62.1	63.6	65	66.2	67.7
Freewheel 18	45.3	46.5	48	49.4	50.7	52	53.3	54.7	56	57.3	58.5	60	61.4	62.6	64.1

BMX RACE BIKE FRAME SIZING
Rider Height	Frame Size	Top Tube Length	Stem Length	Bar Rise	Bar Width	Crank Length	Gearing
4' 0" & under	Micro-Mini	15" - 15.5"	Mini	2" - 2.5"	20" - 21.5"	See Chart	See Chart

4' 0" - 4' 6"	Mini	15.5" - 16.5"	Mini - Mini XL	2" - 3.5"	21" - 23"	See Chart	See Chart

4' 4" - 4' 10"	Junior	16" - 17.5"	Mini - Mini XL	3" - 4.5"	22" - 24.5"	See Chart	See Chart

4' 8"- 5' 4"	Expert	17" - 18.5"	Pro	4.5" - 6"	24" - 26"	See Chart	See Chart

5' 2" - 5' 8"	Expert XL	18" - 19"	Pro	6" - 7.5"	26" - 27"	See Chart	See Chart

5' 6" - 5' 10"	Pro	18.5" - 19.5"	Pro - Pro XL	7" - 8"	27" - 28"	See Chart	See Chart

5' 10" - 6' 1"	Pro XL	19" - 21"	Pro - Pro XL	7" - 8"	17" - 28"	See Chart	See Chart

6' & over	Pro XXL	20.5" & over	Pro XL - Pro XXL	7" - 8"	28"	See Chart	See Chart

CRANK SIZING CHART
Riders Inseam	20"	21"	22"	23"	24"	25"	26"	27"	28"	29"	30"	31"	32"	34"
Crank Length in MM	140	145	150	155	160	162	166	171	175	177	180	182	185	190

WHEEL CHART
Maximum Rider Weight IN Pounds	Reccomended Rim Width
0 - 85 lbs.	Sew Ups
86 - 100 lbs.	20 X 1.125" Dia.
101 - 120 lbs.	20 X 1.375" Dia.
121 - 150 lbs.	20 X 1.50" Dia.
151 - 200 lbs. Plus	20 X 1.75" Dia.