MILWAUKEE BMX
        USA BMX TRACK #1730
           ABA DISTRICT WI01

GEAR CHARTS AND FRAME SIZING

ALL OF THE CHARTS BELOW ARE FOR REFERENCE USE. RIDERS EXPERIENCE LEVEL AND PERSONAL COMFORT MIGHT INCREASE OR DECREASE THE SIZING.

BMX BIKE SIZING CHART
RIDER HEIGHT	FRAME SIZE	TOP TUBE LENGTH	STEM LENGHT	BAR RISE
4'0" AND UNDER	MICRO-MINI	15" - 16"	MINI	2" - 2.5"
4'00" - 4'6""	MINI	16" - 17"	MINI - MINI XL	2" - 3.5"
4'4" - 4'10"	JUNIOR	17" - 18.5"	MINI XL -PRO	3" - 5"
4'8" - 5'4"	EXPERT	18.5" - 19.5	PRO	5" - 7"
5'4" - 5'10"	PRO	20" - 20.5"	PRO - PRO XL	7" - 8"
5'10 - OVER	PRO XL OR XXL	20.5" AND OVER	PRO XL OR XXL	7" - 8"

CRANK SIZING CHART

For Micro Mini, Mini, Junior
Inseam Length	Crank Length
15-16 inch	130mm
16-17.5 inch	135mm
17.5-19 inch	140mm
19-20 inch	145mm
20-22 inch	150mm
For Junior, Expert, Expert XL
20-22 inch	150mm
22-23 inch	155mm
23-25 inch	160mm
25-26 inch	165mm
For Junior Pro, Pro, Pro XL/XXL
25-26 inch	165mm
26-27 inch	170mm
27-29 inch	175mm
29-30 inch	177mm
30-32 inch	180mm
32+ inch	182-185mm

GEAR RATIO CHARTS

Most Pro'S Run Approximately 54 gear inches
44/16 gear ratio with 20x1.75 tire is the most commonly used combination in BMX. Use this as a reference, gear ratio's used will vary by rider experience, rider's age, riders strength as well as track design and length.

For Exact Gear Measurement... Divide Front Gear by Rear Gear and Multiply by Tire Diameter

Example: 44/16 = 2.75 x 19.5 = 53.625 gear inches (20x1.75 tire)

These charts are for general reference - actual tire diameter varies from brand to brand

20" X 1.75" GEAR CHART
Chain wheels	34	35	36	37	38	39	40	41	42	43	44	45	46
Freewheel 14	47.4	48.7	50.2	51.6	53.0	54.4	55.7	57.1	58.5	59.9	61.9	62.7	64.1
Freewheel 15	44.3	45.4	46.0	48.1	49.4	50.7	52.0	53.3	54.6	55.9	57.2	58.5	59.8
Freewheel 16	41.5	42.7	43.6	45.1	46.3	47.5	48.8	50.0	51.2	52.4	53.7	54.9	56.1
Freewheel 17	39.0	40.2	41.3	42.5	43.6	44.7	45.9	47.0	48.2	49.4	50.5	51.7	52.8
Freewheel 18	36.8	37.8	39.0	40.1	41.2	42.3	43.3	44.4	45.5	46.6	47.7	48.8	49.9

20" X 1.50" GEAR CHART
Chain wheels	34	35	36	37	38	39	40	41	42	43	44	45	46
Freewheel 14	46.8	48.1	49.5	50.9	52.3	53.6	55.0	56.4	57.5	59.1	60.5	61.8	63.2
Freewheel 15	43.6	44.9	46.2	47.4	48.8	50.1	51.3	52.8	53.9	55.2	56.5	57.7	59.1
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
Freewheel 17	38.5	39.6	40.8	41.9	43.1	44.1	45.2	46.4	47.5	48.7	49.8	51.0	52.2
Freewheel 18	36.4	37.4	38.5	39.6	40.6	41.7	42.8	43.9	44.9	46.0	47.0	48.1	49.2

20" x 1 3/8" GEAR CHART
Chain wheels	34	35	36	37	38	39	40	41	42	43	44	45	46
Freewheel 14	51.0	52.5	54.0	55.5	57.0	58.5	60.0	61.5	63.0	64.5	66.0	67.5	69.0
Freewheel 15	47.6	49.0	50.4	51.6	53.2	54.6	56.0	57.4	58.8	60.2	61.6	63.0	64.4
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
Freewheel 17	42.0	43.2	44.5	45.7	47.0	48.2	49.4	50.7	51.9	53.2	54.4	55.6	56.9
Freewheel 18	39.7	40.7	42.0	43.2	44.4	45.5	46.7	47.9	49.0	50.2	51.4	52.5	53.7

20" X 1 1/8" GEAR CHART
Chain wheels	34	35	36	37	38	39	40	41	42	43	44	45	46
Freewheel 14	48.6	50.0	51.4	52.8	54.3	55.7	57.1	58.6	60.0	61.4	62.8	64.3	65.7
Freewheel 15	45.3	46.7	48.0	49.3	50.7	52.0	53.3	54.7	56.0	57.3	58.7	60.0	61.3
Freewheel 16	42.5	43.8	45.0	46.2	47.5	48.7	50.0	51.2	52.5	53.7	55.0	56.2	57.5
Freewheel 17	40.0	41.2	42.3	43.5	44.7	45.9	47.0	48.2	49.4	50.6	51.8	52.9	54.1
Freewheel 18	37.7	38.8	40.0	41.1	42.2	43.3	44.4	45.6	46.7	47.8	48.9	50.0	51.1

24" X 1.75" GEAR CHART
Chain wheels	34	35	36	37	38	39	40	41	42	43	44	45	46
Freewheel 14	58.3	60.0	61.7	63.3	65.0	66.9	68.6	70.3	72.0	73.7	75.3	77.0	78.9
Freewheel 15	54.4	56.0	57.6	59.3	60.7	62.4	64.1	65.5	67.2	68.9	70.3	72.0	73.7
Freewheel 16	51.0	52.5	54.0	55.5	57.0	58.5	60.0	61.4	63.1	64.5	66.0	67.4	69.1
Freewheel 17	48.0	49.4	50.0	52.2	53.6	55.1	56.5	57.9	59.3	60.7	62.1	63.6	65.0
Freewheel 18	45.3	46.5	48.0	49.4	50.7	52.0	53.3	54.7	56.0	57.3	58.5	60.0	61.4

24" X 1.50" GEAR CHART
Chain wheels	34	35	36	37	38	39	40	41	42	43	44	45	46
Freewheel 14	55.9	57.5	59.1	60.7	62.3	64.2	65.8	67.4	69.0	70.6	72.2	73.8	75.7
Freewheel 15	52.1	53.7	55.2	56.7	58.2	59.8	61.3	62.8	64.4	65.9	67.4	69.0	70.6
Freewheel 16	48.4	50.3	51.8	53.2	54.6	56.0	57.5	58.9	60.3	61.8	63.2	64.6	66.2
Freewheel 17	46.0	47.3	48.7	50.0	51.4	52.8	54.1	55.5	56.8	58.8	59.5	60.8	62.3
Freewheel 18	43.4	44.7	46.0	47.2	48.5	49.8	51.1	52.4	53.7	54.9	56.2	57.5	58.9

24" X 1 3/8" GEAR CHART
Chain wheels	34	35	36	37	38	39	40	41	42	43	44	45	46
Freewheel 14	58.3	60.0	61.7	63.3	65.0	66.9	68.6	70.3	72.0	73.7	75.3	77.0	78.9
Freewheel 15	54.4	56.0	57.6	59.3	60.7	62.4	64.1	65.5	67.2	68.9	71.3	72.0	73.7
Freewheel 16	51.1	52.5	54.0	55.5	57.0	58.5	60.0	61.4	63.1	64.5	66.0	67.4	69.1
Freewheel 17	48.0	49.4	50.8	52.2	53.6	55.1	56.5	57.9	59.3	60.7	62.1	63.3	65.0
Freewheel 18	45.3	46.5	48.0	49.4	50.7	52.0	53.3	54.7	56.0	57.3	58.5	60.0	61.4

24" X 1 1/8" GEAR CHART
Chain wheels	34	35	36	37	38	39	40	41	42	43	44	45	46
Freewheel 14	54.9	56.5	58.1	59.7	61.3	63.1	64.7	66.3	67.9	69.4	71.0	72.6	74.4
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
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
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
Freewheel 18	42.7	43.9	45.2	46.6	47.7	49.1	50.3	51.5	52.8	54.0	55.3	56.6	57.9

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GEAR CHARTS AND FRAME SIZING

ALL OF THE CHARTS BELOW ARE FOR REFERENCE USE. RIDERS EXPERIENCE LEVEL AND PERSONAL COMFORT MIGHT INCREASE OR DECREASE THE SIZING.