TB Awards 2/9/17
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Contact Us
Hampton BMX Map

Location:
901 E Littleback River Rd
Hampton VA 23669
View Map | Get Directions

Track Operator:
Bobby Powell
757-636-2034
Chris Hanny
757-434-3354
Hamptonsupertrack@gmail.com

Track Image

BMX Gear Chart

BMX Gear Charts

 

Most Pro BMXers Run Approximately 54 gear inches

44/16 gear ratio with 20x1.75 tire is the most commonly used combination in BMX 

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 (19.5" tire diameter) = any size rider

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

44.2

45.5

46.8

48.1

49.4

50.7

52.0

53.3

54.6

55.9

57.2

58.5

59.8

Freewheel 16

41.4

42.7

43.9

45.1

46.3

47.5

48.8

50.0

51.2

52.4

53.6

54.9

56.1

 

 

20" X 1.50" GEAR CHART (19" tire diameter) = riders under 150lbs

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

 

 

20" X 1.375"(1 3/8) GEAR CHART (21" tire diameter) = riders under 120lbs

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

 

 

20" X 1.125"(1 1/8) GEAR CHART (20" tire diameter ) = riders under 80lbs

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

 

 

24" X 1.75" GEAR CHART (23.5" tire diameter) = any size rider

CHAIN WHEELS

34

35

36

37

38

39

40

41

42

43

44

45

46

Freewheel 15

53.2

54.8

56.4

58.0

59.5

61.1

62.6

 

 

 

 

 

 

Freewheel 16

49.9

51.4

52.8

54.3

55.8

57.3

58.5

60.2

61.6

63.1

 

 

 

Freewheel 17

47.0

48.4

49.7

51.1

52.5

54.0

55.3

56.6

58.2

59.4

60.8

62.2

 

Freewheel 18

 

 

 

48.3

49.6

50.9

52.2

53.5

54.8

56.1

57.4

58.7

60.0

 

 

24" X 1.50" GEAR CHART (23" tire diameter) = riders under 150lbs

CHAIN WHEELS

34

35

36

37

38

39

40

41

42

43

44

45

46

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 1.375" (1 3/8") GEAR CHART (24" tire diameter) = riders under 120lbs

CHAIN WHEELS

34

35

36

37

38

39

40

41

42

43

44

45

46

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 1.125" (1 1/8") GEAR CHART (22.6" tire diameter) = riders under 80lbs

CHAIN WHEELS

34

35

36

37

38

39

40

41

42

43

44

45

46

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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