Dual bead diameter tire

Details Dual bead diameter tire Dual bead diameter tire

B - Operations, Transporting

60

C

B60C 3/06 (2006.01) B29D 30/48 (2006.01) B60C 9/17 (2006.01) B60C 9/30 (2006.01) B60C 11/03 (2006.01) B60C 15/00 (2006.01) B60C 15/02 (2006.01) B60C 19/00 (2006.01)

Patent

CA 2104662

DUAL BEAD DIAMETER TIRE ABSTRACT A pneumatic tire having two different bead diameters has handling, ride and treadwear advantages. The tire is made so that the rhom of the longer sidewall and the rhom of the shorter sidewall are equal. The rhom of the longer sidewall is made equal to the rhom of the shorter sidewall by establishing a belt profile wherein the amount of drop at a belt edge is specified to give a mold drop of 0.30 to 0.33 of estimated tire deflection, applying an inflated shape prediction formula to calculate the inflated belt profile and varying the value of rhom until the drop at the end of the belt closely matches a specified value, using the cosine law to specify the change in belt angle with radius, choosing a shoulder point under the belt edge that allows a 0.050 inch wedge between the bottom of the belt and the top of the carcass ply and varying the slope of the ply at the shoulder point until the inflated ply line passes through the Y-max location at rhom.

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