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公开(公告)号：US3630254A
公开(公告)日：1971-12-28
申请号：US87769269
申请日：1969-11-18
Applicant: LUDWIG STADELMANN
Inventor： STADELMANN LUDWIG
CPC classification number: B60C5/22 , B60C5/20 , B60C11/1612
Abstract: The invention concerns a dual-purpose tire which can be used on both dry and snow-covered or icy roads, being made up of a monobloc casing comprising, in addition to its main tube, a second, smaller tube having a tread with points, these two tubes being inflated separately, so that the tread with points can by selection by brought level with or set back from the tread of the main tube.
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