Helt klart MT med pigge.
Jeg køre selv på Simex Extreme Trekker med skruepigge om vinteren. Det grove mønster sørger for at man står fast i dyb sne (og alle andre steder) og piggene sørger for at man har greb på ren is.
Desværre havde vi ikke så meget sne her i Hobro-området sidste år, så jeg kunne prøve dækkene af til jeg sad fast. Men man kan jo håbe at vi får en ordentlig dyne i år, så der ikke bare ligger skaldede 50-75cm :-)
Jeg har sakset lidt fra offroader.com til hyggelæsning:
Mud Tires designated by MT, which typically stands for "Maximum Traction" and often used to describe "Mud Tires" are designed to perform most specifically in the mud but also in or on other terrains that require lots of traction such as on the rocks, in deeper snow, and in loose gravel and in the softer, constantly changing terrain of the wooded trails.
All Terrain tires or AT are a compromise. All Terrains are an attempt to offer good performance both on road as well as offroad. The all terrain tread is intended to performs well under a variety of conditions found offroad while still offering acceptable on-highway performance. This is accomplished by using a tread pattern design where the lugs are tighter together than a more aggressive mud tire's tread. The result is usually a quieter ride on the street than a mud tire due to its lesser aggressive tread pattern. When compared to a street tire, All Terrain tires usually produce more noise. The payoff of an All Terrain Tire is that they performs well on a variety of terrains: rocks, sand, somewhat in the mud while still offering decent traction on the paved dry road.
Mht. pigge vs. sipede dæk, så tror jeg at med et anstændigt antal pigge i, vil piggene slå sipening i greb, da dækket uanset om det er MT eller AT, ikke er lavet med en vinter-gummiblanding, der lige er det der giver det sidste.
Men der er sådan set heller ikke noget i vejen for at gøre begge dele.
Den største fordel ved sipening er at men får væsentligt længere dæklevetid ud af det - helt op til 30% mere.
Hilsen
Jens