I’m with you. My KHS Smoothie, Townie geometry, bikes came with Kenda tires. Turns out they are one of the thickest street tires I’ve owned. Inexpensive, compared to Schwable, but a great value. Today they’re listed for $10 each more than I paid. I watch for sales and grab one or two for backups when they’re on sale. “ Kenda 163026 Big City Slick Wire Bead Bicycle Tire”I get about 2000 miles (a year of riding) on my tires. A little less on the back, a little more on the front. I take them off when the bumps on my tire get under 1/16" thick. Below that I get flats. Above, I don't usually. Most city tires don't even have that much tread. I buy the thickest knobby kenda tires I can get from the LBS, usually 5/32" to 3/16". Flats are a **** with cargo, and worse with a hub motor.