To provide a fibrous cord mixed rubber spike easily set to a common studless tire, superior in gripping force to a slippery snowed and iced road surface, and exerts better antiskid effect.
The rubber spikes wherein fibrous cords 22 are molded into a plurality of layers by rubber material are manufactured into a cross sectional shape and size held in a studless tire groove 46 and protrude zero to five mm outside from a studless tire tread surface, and have a length fitting into the studless tire groove 46 and adjacent spaces. The rubber spikes are used by burying and securely adhering with an adhesive a plurality thereof to suitable positions on the studless tire groove 46. On a slippery snowed and iced road surface, raisings 24 of a fibrous cord layer exposed to a ground contacting side exclude film of water which causes slipping. Thus, larger gripping force than common studless tires is exerted and significant effects such as an antiskid effect is performed.