If you feel the need for speed on two wheels, investigate the latest the electric-bicycle offerings from Porsche. Both the Cross and Sport models come with carbon-fiber frames, heat-resistant hydraulic disc brakes and Shimano EP8 electric motors, 12-gear-shifting systems, plus speed and distance displays. Each bike weighs about 48 pounds and can travel at speeds up 16 mph. The Cross, which is designed more for trail use, gets knobby tires, better brakes and a special Crankbrothers Highline seat. Prices start at $8,500. Full details and ordering info are available at www.shop/porsche.com.