My wife got an urban ebike so she could do some family rides with my son and me. She only rides paved and gravel/crushed stone paths, no singletrack. The bike has 27.5 rims and came with Kenda Kwik Seven.5 tires. These tires are good on paved paths but have poor traction for turning and braking on gravel. Any recommendations for a tire that will work well on crushed stone and gravel but also roll smoothly and quietly on pavement?