| 摘要 |
A farm vehicle tyre ( 1 ) having a tread ( 2 ), which has a toroidal base surface ( 3 ), and a number of lugs ( 5 ), each extending radially outwards from the base surface ( 3 ) and having a front wall ( 6 ) and a rear wall ( 7 ) with respect to a given rolling direction ( 8 ); the leading edge ( 11 ), with respect to the rolling direction ( 8 ), of the section of each lug ( 5 ) along any plane ( 12 ) perpendicular to an axis ( 4 ) of rotation of the tyre is in the form of an involute curve outward of the base surface ( 3 ).
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