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  1. ChinaPhil

    Beijing ebike photos

    A few photos taken quickly whilst I was dashing around Chaoyang District. Pizza delivery: Scooters: dual rear hub motor tricycle:
  2. ChinaPhil

    Fun, photographs, facts and figures - 2WD

    Like many on this forum I enjoy the process of researching then building e-bikes but ultimately my goal is to ride to locations where I can indulge in other hobbies such as sightseeing, photography and video. These journeys normally involve hill / mountain climbing and my bikes have to have...
  3. ChinaPhil

    Why cycling is one of the biggest causes of heart attack

    As any city cyclist will know, riding your bike in heavy traffic can be, metaphorically speaking, a heartstopping experience. But now research has found that it is literally one of the biggest triggers of heart attacks. In a new sliding scale of everyday risks that prove the ‘final...
  4. ChinaPhil

    Bicycle tires – puncturing the myths

    Wider tires roll faster than narrower ones. Larger diameter wheels roll faster than smaller ones. Much more at: http://www.bikeradar.com/news/article/bicycle-tires-puncturing-the-myths-29245
  5. ChinaPhil

    One (big) page guide

    A friend asked me to create a one page guide for adding power to a bike. There must be errors, distortion, complete screw ups etc. so comments are welcomed:
  6. ChinaPhil

    Quest for "super stealth"

    At the moment I have three e-bikes (who only has one?): Bike 1. Cyclone 500W (6s 10,000mAh LiPo or 6s 17,000mAh LiPo) driving a rear derailleur and DualDrive. Bike 2. Astro 3210, 2-stage drive, (12s 10,000mAh LiPo) fixed gearing giving about 16mph. Bike 3. 250W MY1016 Unite Motor friction...
  7. ChinaPhil

    China quarrels over battery-powered bikes

    Electric bikes weighing over 40 kg or able to go faster than 20 km/h (12.4 mph) should count as motorbikes. The bikes use lead-acid batteries that weigh about 4 or 5 kg each. You multiply that by 21 million and that's an awful lot of lead...
  8. ChinaPhil

    A battery-powered car that can travel 400km on one charge

    A battery-powered car that can travel 400km on one charge BYD says that its new E6 electric car due out before the end of the year will do 250 miles (400km) on a single charge. This is a very big number. The Tesla electric sports car does almost as much, but has little room for anything else in...
  9. ChinaPhil

    Hill climbing - Astro 3210

    I am building a bike with the aim of good hill climbing ability. The Astro 3210 and 2-stage drive assembly is shown below. The smaller chain sprocket can be changed from 16-tooth to 12-tooth in order to increase the reduction ratio from 10.0:1 to 13.3:1 (my apologies for distortion in close...
  10. ChinaPhil

    Hill climbing - Cyclone 500W

    Cars and motorcycles are banned where I live, so bikes are a key form of transport. In summer the temperature is 33-35degC (90-95degF) with humidity in the range 70-99%, rust is a real problem. The majority of electric bikes look like this: My current bike, based on a Fuji Odessa, uses a...
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