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  1. Benjahmin

    E bike general discussion and recommendations

    Would you drive a car up a slow steep hill in the same gear you use for cruising? It's the same with a mid drive bike. You must be in the right gear for the motor not to strain. Stick with rear hub, easier to ride and more reliable for commuting.
  2. Benjahmin

    What determines and assists hill climbing capacity?

    I'm not so sure about 'weedy' motors. A 15A controller at a nominal 36v will be developing 540W (battery allowing) on top setting. Chris Frome and the like, develop in the region of 300-350watts when mountain climbing. Even allowing for inefficiencies the motor develops far more, so long as...
  3. Benjahmin

    Battery care?

    Use it, charge it, enjoy it. Try to charge as near to next use as possible. Partial charges don't harm Li-ion technology. This comes from old Ni-cad technology. If you're not going to use the bike for a period (weeks), charge it then go out and put 10-15 miles on it, then store it. Don't...
  4. Benjahmin

    Battery charge cycles

    Car systems are way more sophisticated than bike systems. Bike bms has top down bleed resistors to balance cell strings. Therefore, if you only charge a bike battery to 80% it cannot balance. Also if battery voltage achieves the same level as the charger output voltage the no current flow can...
  5. Benjahmin

    Anyone in the Bournemouth area who can help fix my bike?

    Ok, just looked at the spec, unfortunately it does actually say much. It looks like the controller will be in the base of the battery. Might be worth feeling around the base of the battery under shut down, to see if it's hot. Does the motor have any markings on it? Have you tried askin e-bikes...
  6. Benjahmin

    Anyone in the Bournemouth area who can help fix my bike?

    It sounds like a classic case of the battery not being able to supply the amperage that the controller/motor is calling for. Under heavy load conditions (high amperage) if the battery cannot produce quick enough, then the voltage will sag, maybe as far as lvc (low voltage cutoff). Then the bms...
  7. Benjahmin

    Voodoo Bantu by aftermarket conversion by The Small Green Room - help requested

    Could be anything. You'll need to put up pictures of the motor, display unit, controller (if you know where it is) and battery. Then, those with more knowledge, will probably be able to help.
  8. Benjahmin

    Britain's First 'Dutch-Style' Roundabout Closed 10 Days After Opening When Car Ploughed Into Beacon

    Seems to me it could only work in conjunction with a 20mph limit in a town. This looks like it could be on the outskirts of a town, I don't think we'd currently see anywhere near the volume of pedestrians and cyclists on a British one - even in Cambridge.
  9. Benjahmin

    Powabyke Xbyke/Tongsheng TDZ - a 'not another build thread' thread

    Tidy install, love the paint job. Let us know how you get on with the battery mount, 'cos I know it would get in the way of my plates of meat !
  10. Benjahmin

    Lightning like never before

    Same here in West Wales, around midnight. Lightning was all around us, all compass directions, with only the occasional distant, quiet rumble. This morning is very misty and quiet, the swifts and swallows seem to be having a bean feast over the field behind us.
  11. Benjahmin

    battery recommendations

    What do you mean 1000w? I'm guessing you have a large '1000w watt' direct drive motor? Cheap large batteries are available and are usually rubbish - even dangerous. You get what you pay for. If it has unspecified/unbranded cells it will disappoint and will not deliver the current needed for...
  12. Benjahmin

    Bafang motor question.

    No it's not. Are all your brakes adjusted properly, i.e. not binding? Is it a front or rear motor, is it fitted so that it clears frame and forks, does it rotate freely when hand spun on the stand with no power? You can save battery any time by slightly pulling a brake which has a switch which...
  13. Benjahmin

    New owner having problems.

    Jonah's right. Throttle is always fullchat. The bike should have a pas system (pedal assist sensor), this will detect the rotation of the pedals and give power/speed to the level set on the display. Maybe the guy converting it didn't fit the pas - some don't. There should be a plastic disc...
  14. Benjahmin

    NANO BROMPTON conversion

    Some motors, when new, can be a bit tight. My own Ezee front hub was, put a couple of hundred miles on it and it will ease up. I'm assuming you've checked the brake for any drag?
  15. Benjahmin

    Schottky Diode Parallel Pack Adaptor

    Thanks Wheezy. Can I ask, doesn't the electrical insulation, between the diode tab and the heat sink, also act as a thermal insulator, so somewhat defeating the purpose of the heatsink? I'm wondering if youcould mount the diodes back to back, each side of the heatsink, and use the heatsink as...
  16. Benjahmin

    Hydraulic brakes on cargo trike

    Hs 11's are certainly a very effective brake, really the rim is like a huge disc. I did wonder if you could put a Y splitter in the hydraulic tube, but I guess there wouldn't be enough lever travel to operate both brakes. What's the braking on the rear wheel?
  17. Benjahmin

    Oxygen S-Cross CB MKII

    Ahh ! A modern bike, victorian railings, Welsh mist and Italian ice cream - what's not to love? :cool:
  18. Benjahmin

    Cycling Jacket

    Paramo do a specific cycling jacket. It has armpit/torso ventilation zips, it's breathable and the hood fits well so that it turns with your head. It's also adjustable to fit over a helmet. I assume that, as it's a cycle jacket, the arms are thereby longer. Thing is, they ain't cheap, but...
  19. Benjahmin

    Overtaking men on road bikes!

    I don't come across them much either. The reason being that I don't see the pleasure in riding busy straight A roads when I have a plethora of lovely windy, traffic free, single track lanes to choose from. For some reason roadies don't seem to like them:rolleyes:. Possibly it's because of...
  20. Benjahmin

    Parallel batteries

    But the advantage of running two in parrallel is less 'wear and tear' on the cells because the maximum current is nominally 50% from each battery, and charging cycles are not so deep. I've been running two batteries for about 18 months now. Voltage is measured every time before connecting. The...