All tow watersports require different rope lengths. If you're wakesurfing, a 10-foot to 25-foot rope is fine. For wakeboarding, you'll need to extend that by 20-feet and by up to 50-feet for water skiing. For wakesurfing, you're closer to the boat, riding the wave. The rope keeps you in the pocket and riding and helps you recover if the wave pushes you out. It would help if you had a bit more length to cross over the wake and perform tricks with wakeboarding. For waterskiing, you want to be as far back as possible, up to 75-feet, to get steep, deep carves.