![]() The stuff in the picture is the sensing system to determine if and how fast the cyclist is pedaling. The controller box sends power to the motor when the cyclist is pedaling. The connector end of the cable shown in the picture is plugged into the motor controller box which powers a hub motor in the front or rear wheel to assist the cyclist. The details of how to do this should be in the instructions that came with the item in the picture. The bracket contains a Hall Effect sensor which is triggered by the magnets in the black thing. The silver bracket with the cable coming out is attached rigidly to the bike. ![]() The black thing with a splined hole in the middle and a ring of five magnets is supposed to be attached to, and rotate with the crankset, possibly in place of one or more chain rings. (03-28-2013, 02:25 PM)nfmisso Wrote: I did a bit of research.and will provide some guesses. I will check on that and see.But still I like to know, about the wheel chain size the spindle and other accessories, like I say, I don't know anything about it. This is the kit they use to replace the 1 piece to a 3 piece crank set. I suspect this is what you want to replace the 1 piece huffy crank which is similar to the Bmx. My Bike have a three gear chain wheel part of the crank and a five gear rear cassette, that will have to changed or find a chain wheel to go with it.or in any event chain the whole system to a single speed or so. Now, the space where the crank goes right to left is too big for a three pieces crank, so I have to install a Bottom Bracket Adapter (Picture above) that they say will converter from a American one piece crank bed to a European three pieces crank bed. I want to install a Pedelec Magnetic for my Front Wheel Electric Motor and because I can't install the pedelec on a one piece crank I need to change it for a three pieces one. I have a 15 Speed Mountain Huffy Granite one piece Crank with a Three Gear Chain Wheel and a Five Gears Rear Cassette. (03-25-2013, 02:21 PM)mateff Wrote: I'm sorry if can't explain my self, but I'm new in this things: For example our T50 currently has a 7 speed cassette with triple chainrings, and will be getting a 9 speed cassette (new rear wheel, rear derailleur and shifter) in the next couple of weeks. Now with the proliferation of high count cogs on cassettes, some refer to an old 10 or 15 speed as a 5 speed with double or triple chainrings. See for more information on Shimano component installation.Įven though it says 7 speed, a 5 speed or 6 speed freewheel will fit fine.Ī couple of decades ago, people used to refer to bikes as 10 or 15 speeds, signifying 5 gears in back and 2 or 3 in front. ![]() I have than combination, and will be changing to a 113mm axle BB soon.ĭifferent cranksets have different recommended BB axle lengths.Īt the same time that you replace the cranks, you should also replace the chain and freewheel. Shimano recommends 122.5mm axle BB for the M131. You can install a single chainring crankset if you want, they are more expensive than the M131, and that will result in you having a 5 speed bike instead of a 15 speed. More expensive ones are lighter, but not more rugged. It is rugged and will last a very long time. The M131 is about the least expensive crankset available. Thanks for you answer I think is help me understand a little more about this, thanks a lot. Which wheel I will need if I have a 15 speed system, a single one or a three like the one I have. (03-24-2013, 10:33 PM)mateff Wrote: I guess that I will need all of that, but the question is which one, the 68/107 or the 68/127.5.
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