You're also in Toronto. You shouldn't be using the PS3s for at least 4-5 months of the year anyway. They are absolutely awful in the cold/snow and that's even written on a sticker in the door jamb stating such.
If you split the tire life between winters & summers you should be okay for them to last over your 4 yr lease.
2012 Blue Candy Titanium!
Former 03 Vibe, 96 Sunfire, 90 Prelude, 87 Civic