Last year I rode Kenda Smoke 26x2.1". Tall knobs to roll over the tire shards+ glass fragments, without flats. Center stripe to keep the noise down. I hope modernbike.com has some more, I just installed my spare on the rear. I change them out when knobs get <3/32". That's about 2000 miles. $26 last year, free freight since I bought a 300 lumen headlight.
Funny, I wore out the rear first, but the motor is on the front. I must be pedaling 90% of time as I always post.