... tyre stud for motorcycle tyres,spikes,ATV and tractor 1,easy-to-install for tires, ... tracks and soles. Carbide tyre stud for motorcycle tyres,spikes,ATV ... 1.8index of abrasive resistance :71+/-7.5the center color: silvery 2.cloth of Carbide tyre stud for motorcycle tyres,spikes,ATV ... of Carbide tyre stud for motorcycle tyres,spikes,ATV and tractor Length(H)10mm, 11mm, 12mm ...