If you like the Fairfax you can ask Marin the max tire width it can accept and swap tires. If you don't mind a steel frame and a little weight the Marin Muirwoods is a great heavy duty city bike but i don't know how steel frame would fare in Totonto's salty roads with snow and slush. It comes stock with 42mm tires and i think it can accept 2" wide tires easily if not wider. I swapped mine with 700x43 Panaracer SS tires and couldn't be happier.