2004 Ski-Doo Racing Handbook, Page 56Get this manual
SECTION 03CHASSIS PREPARATION A15F2IA
A122 mm (5 in) 147 mm (6 in)
98 mm (4 in) 171 mm (7 in)
The condition of the skis and runners, as well as their alignment, has an effect on top speedThe ski toe-out must be correct; any irregularities in the skis should be removed, and bent or badly worn runners must be replacedCAUTION: The amount of carbide allowed on each runner may be limited by your race associationCheck your rule book