2015 Zieman J Series J-1B, Single Ski trailer with box! 2015 Zieman J Series J-1B This Deluxe model comes standard with a large storage box, full length rear steps, jack and caster. Single Watercraft w/ box and container rack, 13'' tires, jack post and winch stand. Optional Available Equipment: Swivel Jack - Exchange for Top Wind Jack Chrome Wheels - Exchange White Wheel for Chrome Wheel per Pair (13''&14'') 13'' Spare - Spare Tire & Wheel w/ Mount 13'' Chrome Spare - Chrome Spare & Wheel w/ Mount 14'' Spare - Spare Tire & Wheel w/ Mount 14'' Chrome Spare - Chrome Spare & Wheel w/ Mount