Tech Bulletins

 

DIAMETER, ROLLOUT (CIRCUMFERENCE) AND REVOLUTIONS PER MILE CHART

Below is a chart to assist in vehicle drive-train calculations.

Diameter

Rollout

Revs/Mile*

17.5

55.0

1222

18

56.5

1186

18.5

58.1

1152

19

59.7

1120

19.5

61.3

1090

20

62.8

1061

22

69.1

960

22.5

70.7

938

23

72.3

917

23.5

73.8

896

24

75.4

877

24.5

77.0

858

25

78.5

840

25.5

80.1

823

26

81.7

807

26.5

83.3

791

27

84.8

776

27.5

86.4

761

28

88.0

747

28.5

89.5

733

29

91.1

720

29.5

92.7

708

30

94.2

695

30.5

95.8

684

31

97.4

672

31.5

99.0

661

32

100.5

651

32.5

102.1

640

33

103.7

630

33.5

105.2

621

34

106.8

611

34.5

108.4

602

35

110.0

593

35.5

111.5

585

36

113.1

576

36.5

114.7

568

37

116.2

560

37.5

117.8

553

38

119.4

545

38.5

121.0

538

39.5

124.1

524

40

125.7

517

45.5

142.9

453

46

144.5

448

53

166.5

388

53.5

168.1

384

54

169.6

381

*Based on approximate loaded radius.

This is Dick Cepek General Technical Bulletin #3.
Revised 6/3/09
For more information regarding Dick Cepek Performance Products
Website: dickcepek.com
E-mail: tech@dickcepek.com
Phone: 330.928.9092