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Beaded Edge Wheels 

Beaded edge tyres are kept in place by reinforced rubber beads which are held by the rolled edges of the wheel rim. They were used on early bicycles, many pre-1924 cars and most motorbikes until 1927.

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Beaded edge wheel rim dimensions.

 European tyres were usually measured in millimetres whilst in America they used inches. The first table below gives details of the dimensions of beaded edge wheel rims. The second  table refers to the tyre sizes.
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HIGH PRESSURE TYRES PRIOR TO 1928
 Wheel Rim Sizes - dimensions in millimetres:

Tyre Size

Outside Diameter

Inside
Diameter

Overall
width

Inside width
26 x 3 540 506 63 44
30 x 3 639 605 63 44
28 x 3.5 565 528 75 51
30 x 3.5 616 579 74 51
32 x 3.5 672 631 75 51
550 x 65 446 414 58 39
650 x 65 536 506 58 39
710 x 90 548 511 74 51
760 x 90 592 555 74 51
810 x 90 646 609 74 51
756 x 105 596 553 88 62
815 x 105 649 606 88 62
875 x 105 712 671 88 62
820 x 120 609 561 98 67
880 x 120 672 625 98 67
920 x 120 711 663 98 67
835 x 135 609 559 109 77
895 x 135 634 585 109 77
935 x 135 684 635 109 77
855 x 155 579 519 127 90
955 x 155 677 617 127 90
1025 x 185 670 592 160 113
1085 x 185 771 693 160 113

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HIGH PRESSURE TYRES PRIOR TO 1928
 Tyre Sizes - dimensions in inches:

Tyre Size

Overall Diameter

Inflated
Width

 Approved
Rim Width

Max. Load lbs.

 Revs
per Mile
26x3(700x80) 27.25 3.25

1.75

 440 779
710 x 90 28.30 3.60 2.00 650 750
760 x 90 30.30 3.60 2.00 650 707
810 x 90 32.30 3.60 2.00 650 657
815 x 105 33.00 4.10 2.45 900 643
875 x 105 35.50 4.10 2.45 900 597
820 x 120 32.20 4.65 2.64 1225 659
880 x 120 34.80 4.65 2.64 1225 610
895 x 135 35.00 5.25 3.03 1600 606
715 x 115 28.20 4.50 2.44 560 752
720 x 120 28.50 4.75 2.44 780 743
730 x 130 29.10 5.10 2.44 895 732
775 x 145 31.00 5.65 2.64 1120 684
30 x 3.5 31.00 3.65 2.00 750 684
30 x 3 30.60 3.15 1.75 600 693
36 x 4 36.10 4.20 2.50 1000 588
37 x 4 37.00

4.10

 2.50

1000

 573

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LOW PRESSURE TYRES USED FROM 1925 TO 1928
Tyre Sizes - dimensions in millimetres:

Tyre Size

Outside
Diameter

Inside
Diameter

Overall
width

Inside
width
715 x 115 488 447 88 62
720 x 120 488 447 88 62
730 x 135 488 447 88 62
775 x 145 526 480 98 67
780 x 150 526 480 98 67
860 x 160 552 503 109 77
905 x 165 579 525 114 81

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