See: Pro-Line

Pro-Line have added the new S4 compound to their range of 1/8 Buggy and Truggy tyres. The S4 is a Super Soft Long Wear compound offering substantial leap forward in terms of grip in dry and slick conditions and also stays stable throughout long main events and do not fade or get soft near the end of the race. The S4 is available for the Blockade, Hole Shot, Fugitive, Buck Shot, Slide Lock and Invader buggy tyres and also for the Hole Shot VTR 4.0″ and Buck Shot VTR 4.0″ truggy tyres.