\"Climb the steep slopes without panting! \"Hammer in 20 miles/hour, don\'t sweat! \"At the International Bicycle Trade Fair held in Las Vegas recently, a large number of companies hyped Lance Armstrong- Like the power of an electric bike. -a pedal- When you need an electric bike, provide extra speed with an electric motor. Although E- Manufacturers say bicycles are not as popular in the US as they are in Europe and Japan, gasoline prices are high, obesity crisis, better lithium- The wave of ion charging batteries and green consciousness makes them suitable for the times. This review includes two types of electric bikes: \"pedal- Auxiliary, \"in this case, the rider must keep the pedal to start the engine,\" throttle \", in which the motor can work independently. --Roy M. Electric bike 7200: Electric-assist, hybrid-style 24- Large speed bikeroad-bike- Rear wheels, suspension forks and seat columns in size Hub engine and slip coverIn the battery rack To make the engine work, it is necessary to ride a bicycle. Like: it looks and feels like a regular bike until you turn on the quiet and smooth engine with its four powers Accelerate settings to accelerate your own pedal input by 25%, 50%, 100%, and 200%. Like all the bikes reviewed here: the more you step on, 36-volt lithium- Manganese batteries continue. The 7200 is also \"regenerated\", which means it can be charged by braking and can be set to regeneration mode when going downhill. A full charge, ped stepped, claimed a mileage of 40 miles. Charging is faster: charging 90% in 2 1/2 hours and charging 100% in 3 1/2 hours. The 6- The pound battery for remote charging slides out of the rack. This 7200 weight 45 pounds, electric bike is light weight, is the low end of the three Trek bicycles -- Bicycles and wires. To and from work, to the Fender-and disc-brake- Equipment Valencia ($2,500 ). Dislikes: None. Price: $2,309. (800) 313-8735; www. trekbikes. com. -- Instant ArmstrongCurrie Technologies iZip Express: 20-six-inch- Wheel bike with suspension fork and seat after a huge Frame battery and powerful 750-watt / 1- The horsepower engine of the rear hub. Like: The huge motor will make you feel charged. Work hard (not all) Out), I drove 25 miles per hour along a long hill in the headwind. The 36-volt lithium- There are five levels of auxiliary ion batteries; Claimed range of 31 miles for full charge Power Mode, 45 miles in standard mode, more than 50 miles in economic mode. On a flat ground, the maximum speed of the rider pedal at the least is 20 miles per hour. Currie Technologies is one of the largest electronics products in China Bicycle dealers. This is the highest. end bike. I don\'t like it: iZip is heavy, it takes 6 to 8 hours to recharge, not cheap. Price: $2,999. (800) 377-4532; www. currietech. com. --Throttle-twisting econo- CruiserPedego: comfortable, low Hanging, relatively low-priced six- Speed cruisers designed for Hill Baby boomers who don\'t like sports It has balloon tyres, rear hub engine, rack battery and rear hub Hub engine that does not require manual throttle control of the pedal. Like: it\'s very interesting. it looks cool and has a good choice. With the previous \"pedal- Assist \"test the bike and you can choose if you want the pedal-only, throttle- Only one time or both. When you don\'t want to step on it, it\'s better not to step on it, and it helps to know where you are in terms of effort. With the seat tilted back and down from the crank, the bike has a comfortable, upright Rear seat position Removable, 36-volt, 500- The charging speed of watt lithium battery pack is relatively fast: charging 80% in one hour and charging 100% in four hours. Speed is controlled at 209 miles per hour (motor only-- If you step faster), so it\'s legal on the bike trail. The group\'s lowest price so far. I don\'t like it: it\'s not very good in Changshan- The handlebars are high due to the relaxing seating position, so you can climb. Weight 60 pounds. Price: $1,595. (949) 336-8333; www. pedego. com. Metro: aluminum, all-mini motorcycle 7-suspension Small (20-inch), wide (3- Inch) rear tire Hub engine, manual throttle and lithium- Ion battery pack hidden inside the scooter-style frame. Like: like Pedego, it has a comfortable, fun feelingvolt, 500- The pedal-assisted watt motor is not required to travel 20 miles at a speed of 20 miles per hour; The pedaling board can get a greater speed. Pedal assist is 40 miles away. Adding a second battery pack can double the range. Including a real Time status of the charging indicator. Don\'t like: pray if you have to move it up the stairs; it\'s 73 pounds. Price: $2,700. (415) 693-3110; www. ultramotor. com. -- In addition, other good bicycles that have been tested but will not be sold until next month include: kilowatt cyclists: relaxed-geometry pedal- Assist, these seven Lithium on high speed commuter bikes- The ion battery will last between 25 and 40 miles. $2,400; (817) 334-0071; www. killowattbikes. com. Sanyo Eneloop: Pedals-assist three- The speed bike sold in Japan has a history of several years, with a light weight and a regeneration of 1/2-pound lithium- Ion batteries with charging time of 3 to 3 1/2 hours. It charges 37 to 46 miles on a flat ground, up to 40 miles on a mountain, and up to 16 miles when carrying heavy objects. $2,299; (800) 858-8442. -- Warak is our colleague. The author of \"cycling for life: How to Ride to 100. \"Roywallack @ aol.