Wheel Hubs for Exmark LCT18BV483 LCT21BV523 LCT23BV603 LCT4418BV LCT4818BV. Premium Quality Replacement Part. LCT18BV483 – Exmark 48 Lazer Z CT Zero-Turn Mower, 18hp Briggs & Stratton (SN: 600000 – 669999) (2006). LCT18BV483 – Exmark 48 Lazer Z CT Zero-Turn Mower, 18hp Briggs & Stratton (SN: 670000 – 719999) (2007). LCT18BV483 – Exmark 48 Lazer Z CT Zero-Turn Mower, 18hp Briggs & Stratton (SN: 720000 – 789999) (2008). LCT21BV523 – Exmark 52 Lazer Z CT Zero-Turn Mower, 21hp Briggs & Stratton (SN: 600000 – 669999) (2006). LCT21BV523 – Exmark 52 Lazer Z CT Zero-Turn Mower, 21hp Briggs & Stratton (SN: 670000 – 719999) (2007). LCT21BV523 – Exmark 52 Lazer Z CT Zero-Turn Mower, 21hp Briggs & Stratton (SN: 720000 – 789999) (2008). LCT23BV603 – Exmark 60 Lazer Z CT Zero-Turn Mower, 23hp Briggs & Stratton (SN: 600000 – 669999) (2006). LCT23BV603 – Exmark 60 Lazer Z CT Zero-Turn Mower, 23hp Briggs & Stratton (SN: 670000 – 719999) (2007). LCT23BV603 – Exmark 60 Lazer Z CT Zero-Turn Mower, 23hp Briggs & Stratton (SN: 720000 – 789999) (2008). LCT4418BV – Exmark 44 Lazer Z CT Zero-Turn Mower, 18hp Briggs & Stratton (SN: 510000 – 539999) (2005). LCT4418BV – Exmark 44 Lazer Z CT Zero-Turn Mower, 18hp Briggs & Stratton (SN: 540000 – 599999) (2005). LCT4818BV – Exmark 48 Lazer Z CT Zero-Turn Mower, 18hp Briggs & Stratton (SN: 510000 – 539999) (2005). LCT4818BV – Exmark 48 Lazer Z CT Zero-Turn Mower, 18hp Briggs & Stratton (SN: 540000 – 599999) (2005).