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Well, if you're more interested in speed and not so much comfort, then narrower tires with little to no tread would be advisable. Of course, the drawback to that would be more expected flats, unless you have flat resistant tires. OTOH, if you really don't care that much about speed, but you wanna have a more relaxing ride, then you might opt for wider tires.

If it were me, I'd opt for wider tires, a rack, and fenders. You see, I like comfort and convenience. Steady as she goes...I'll get there in due time, safely and hopefully without incident...

Sincerely,

Fred

PS.

Make certain you carry your OnGuard or NY Fahgettaboudit U Lock at all times. Carry a patch kit and wear bright reflective clothing ( a safety vest would be nice). Make certain that your arithmetic is protected at all times when riding. You'll need a bell or Airzound to alert folks in case of an emergency. Some dogs like to chase for fun. Some dogs like to chase and bring down their prey. Therefore, since you're not the Dog Whisperer, carry pepper spray. You'll need tools and a pocket knife.