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  1. S

    Opinions for a new build?

    Having ebike with 9c rear motors , 1 at 36V Lifepo4 and the other using 48V Lifepo4 , the 9C with 48V justs comes alive compared to 36V. Mind you I am running 40 Amp controllers on both and using 26inch wheels with Big Apple tyres on both.For a commuter ebike a 9C motor with 48v using A123...
  2. S

    Mutant E-Bike

    Yes 20% is a very steep grade and it is a 200 metre pathway so peddling in a low gear is required to keep the speed up. The motor is a new 9 x 7 and I like its thin configuration and I find it to be efficient around 17 Wh/ km when travelling on my 8 km trip into the centre of Sydney. The centre...
  3. S

    Mutant E-Bike

    This is my latest creation which i built with the help of my whizz smart kid. It has a 55 volt Cell man A123 battery back which has been incorporated centrally into the frame and a 9 Continent rear hub motor. Maximum speed is over 40Kph and has a range of some 40 km and i use it as my intra...
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    RE:Attention Australia preferrably NSW

    You could try John at Europa Bikes , Kensington, near University NSW , also called Australian Cycles, Sydney No. 02 9663 3644. He has laced 2 or 3 wheels for me over the last couple of years. He likes a 2 0r 3 cross over using 12 G spokes due to large torque produced by hub motors. He has been...
  5. S

    Inclinometer/Clinometer/Tiltmeter with back light?

    I have purchased one of these cheap inclinometers. They are very jerky on a bike , hard to read and mount accurately. In fact they are rubbish for our needs. I hope you can find something, but my Garmin GPS unit is really excellent.
  6. S

    Which bolt on 48 volt bicycle system for me?

    Which motor you choose is up to you, but for what you want 48 V is the right choice. You will need a motor that has an output of around 1500n Watts which will use a max. of 1800 Watts input. Importantly, as you will want to continue to pedal at the fast speeds that e-bikes go at, you will need...
  7. S

    Welding steel bicycle Frames

    Having now constructed the frame I can state that using a gassed good quality MIG welder using 0.8 mm wire was very successful. Using a gasless cheap MIG welder was hopeless, but I must acknowledge that I am far from being a good welder at the moment. Anyway hiring the gassed welder for a day...
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    E-bike Concepts for a design project (UPDATED!)

    By the way, the lead acid battery, was the first rechargeable battery invented by Glasto Plante in 1859 , some 140 years ago. Get with the times, please.
  9. S

    E-bike Concepts for a design project (UPDATED!)

    The use of SLA batteries is incorrect. It is like designing a computer using valves. The lithium type battery is the technological advance that makes electric bicycle a truly viable mode of transport. The electric bicycle for where I live, Sydney, Australia, which is quite hilly needs a 1500...
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    Solidworks Structural Member question

    You can also make the parts manually to define a part to be any size. 1.Select the profile you would like to sketch onto, then draw up the frame shape (top view most likely) 2.Then smart dimension this piece to any size you would like. 3.Exit the sketch 4. Extrude this piece to the length you...
  11. S

    Homebrew LED Light

    Thanks for your interest. The DC -0 DC has an output of 4.2 amps at 12 Volts The Magic Shine has 8.4 Volt batteries (fully Charged)
  12. S

    Homebrew LED Light

    Thanks for all the above. Unfortunately,I got lost in the complexity. Can I run a Magic Shine 900 lumens on 12 V as I have a 12 V outlet available from DC-DC from my 48V Ping Battery without damaging too many things Thanks
  13. S

    Welding steel bicycle Frames

    I am modifying a steel frame to lengthen it by some 10 cm to get 48V 20Ahr. battery into frame. The lithium battery is only 70 mm thick. What is the best/easiest way to weld bicycle frame steel and can anyone suggest a reasonable welder happy to do this small job in the Sydney, Australia area.
  14. S

    What is your AVERAGE trip speed?

    My average speed , using 48 V system and drawing a max of 1800Watts with a max speed on flat of 45 Kph is usually 30 kph over a 10 mile trip. The average speed in my car over several months in the same traffic conditions is 32 kph so really not significant difference. The shorter trips on the...
  15. S

    Help choosing power of the hub

    you ask a number of good quest\ions Firstly always better to push a bicycle from the rear wheel than the front wheel - less chance of spinning front wheel in wet/icy conditions and so losing steering and hence control, also bicycles designed to be powered from rear wheel. For the power you want...
  16. S

    200 miles in my first week on the eBike -- Thanks ES!

    well done in making a nice reliable e-bike. E-bikes with lipo batteries really have come off age as a practical mode of transport.
  17. S

    El Steak Super-Commuter

    A very neat and tidy bike. Well Done. Hate to sound very dull but what rear cassette are you running as getting 11 tooth cassette am finding to be difficult and as you rightly said you need a very small rear gear on a powerful e-bike due to speeds you travel at but still want to do some...
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