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I'll have to stick with the CA for the foreseeable. My wife would string me up by my gonads if I chucked the CA haha.

Chuck it? Haha I've only had the CA a few months and I love it. I went for a ride tonight and had the speed limited to 20 mph it was only using about 250 odd watts to keep it at that speed. I've never used the speed limiter on the CA before. Nice feature.

Thanks. I had forgotten you'd already told me that, so much to take in. Will I still be able to use one of the hall sensor wires for the speedo on my CA with a geared motor?

Right I see. I'm coming round to the idea of a top speed of 22 mph as that's were I spend most time anyway. The Q128 you recommend, does it come in a 48v version? Or is it a 36v that's fine to run at 48v?

Thanks that gives me a very good idea what its like. My current hub has a no load speed of about 39mph. Are there any geared hubs that can pull about 25 mph at max power? Or would it be pointless and I should just stick to my current hub?

I use the cruise control function on my CA I think that will do the same thing? I've been reading up on the bafang bpm. Where is the cheapest place to buy one? I bought my son a supposed 250w 36v geared kit, although it came with a 15 amp controller so more like 500w. I really like the torque...

Thanks. My cells are PF but I understand your point. Maybe I should cruise at a higher speed? Although it does draw less amps at 20mph.

Tha Thanks for that information. I'm still learning when it comes to hub motors. My main concern is the voltage sag knackering my battery. But even when I set my CA to 25 amps I cruise at about 20mph which only pulls 9-10 amps on the flat. So I'm not pulling 25 amps continuously anyway. And at...

T Thanks again. Will the 328rpm version hit 28 mph without peddling? I'm just trying to get an idea of what its like. It looks like a 250w motor which I quite like the idea of.

Great thanks d8veh. On my current motor I can hit 30mph on the flat (I'm 13stone by the way). What would my top speed be roughly with the Q128H you mentioned? 26" wheel.

Yes I understand thank you. I told Jimmy exactly what my setup was before I bought the battery and he recommended pf cells. The battery is still working as well as new a year later. Jimmy told me the pack would be good for 50 amps continuous discharge.

Are geared motors lighter on batteries? The bms had a resistor fault and also a dry solder joint. The dead cell on the other hand I'm not sure what caused that. What hub motor would you recommend for my setup? It's had a hard life and it's probably time I changed it anyway.

Yes d8veh as flecc said, it is one of those direct hub motors. I usually run it at 15 amps for my comute and the sag is about 3v. What is an acceptable voltage sag?

Thanks for the reply's. Interesting information about PF cells there. The total resistance of the pack is 0.172 ohm's so according to my calculations that would give a 4.2v drop straight from the battery at 25 amps? So it seems normal for my cells? I'm not worried about the sag as long as it's...

Hi I've had a frame bottle mount battery built by Jimmy at insat for a year now. It's built with PF cells 13s 5p. Apart from the battery having to be sent back 3 times for Jimmy to repair with various faults from BMS problems to a dead cell it's been great. The voltage of the pack has always...

Hello I've been reading and getting information from this forum since I first built my bike a couple of years ago and I have gained almost all my electric bike knowledge from here, so I thought it was about time I joined. My bike is a carrera vulcan from halfords with a rear DD hub motor, a 48v...