A 70 kg adult sits in the Adult band — 65–68". Most adult combos are 67" or 68" and that's the right starting point for an average-build adult rider.

Under 32 kg: Kids combos, 42–50", with a training bar. From 35 kg up to around 52 kg: Junior combos, 55–59". The calculator above will match weight and height to the right pair.

Yes, within reason. If both riders fall in the same size band — both in Youth, both in Adult — one pair works. If you've got a teenager and a heavier adult sharing, the adult will struggle on Youth skis and the teen will struggle to control Adult skis. Two pairs is the better answer.

Tow speed depends on the rider's weight, not the ski. Rough guide: children 22–24 mph (35–38 km/h), teenagers and lighter adults 26–28 mph (42–45 km/h), heavier adults up to 30 mph (48 km/h). Start slower for deep-water starts and build up speed once the rider is up and tracking.