I guess no one was buying them, and their low-power option is now limited to the Solterra:
www.aventon.com

Electric Bike | Aventon Ebike | Free Shipping
Take a relaxing, enjoyable ride on an Aventon electric bike. With pedal-assist, these adult ebikes empower you to go further & faster than traditional bikes. ✅ Over 1,800 authorized service dealers for test rides ✅ 2-year warranty ✅ Fast & free shipping over $100 ✅ Say yes to adventure.
