Schwalbe ice spiker pro winter tyre raceguard lighter grippier faster the turbo of spike tyres with 361 spikes it bites firmly into icy roads the tungsten carbide core of each spike is clad in weight saving aluminium the scales stop at 995g yet the tyre remains sporty and agile in order to ensure that spikes are permanently fixed tyres should be run in for about 40km on asphalt while avoiding any fast acceleration or heavy braking features etrto 54 559 size 26 x 210 compound win