... rocky harsh conditions in pit lane tunnel, 2.1400-20,29,5-29 1. suitable to loaders, scrapers and excavators, operating under ... and wear resisitances, smooth thickened and super thickened treads increase rock puncture resistance, provide extremely high cutting resisitance.2. size: 12 ... ,20.5-25,23.5-25,26.5-25,29.5-25,29.5-29,25/65-33.3, PATTERN: L-3, E ...