In mowers? My Kees (Kohler 25) has had one new set put in at 1500 hours

The Exmark Metro (12.5 Kawi) has probably had 3 in 6 years, probably equates to 1800 hours. My Grasshopper (21 Kubota) had 3 sets I think in just over 2000 hours. My Lazer (26 Kohler) is on it's third set at 120 hours

But that one doesn't count.