Endless Sphere

Oh I guess I have a bad eye for judging hill gradient. There’s a hill going east on York Mills at Yonge that I thought was such a grade. I'm guessing around 6.5%, based on 100ft rise and 0.3 mile run. That's the same as the street I take from the bottom of the hill to my house. That would be more r...

Just trying to understand whats best to carry my 500lb bike and trailer set up better up 30% hills. i assumed 2WD and got a gmac 8t to install alongside my Crystalyte 1500 watt set up..but now am not so sure...and just want to find out good conclusions rather than assuming too much and potentially ...

Hi everyone, I have a MAC 8T hub motor paired with ASI BAC 800 controller and 52v battery w/ 40A BMS. It is currently set for 1500w max. Would it be safe to run this around 2000W or a little beyond? TIA. burst or continuous? it'll last a few minutes continuous. Burst for up to 5 mins. Looks like 3 ...

brucejun wrote: ↑

Mar 01 2021 8:06pm

Hi everyone,

I have a MAC 8T hub motor paired with ASI BAC 800 controller and 52v battery w/ 40A BMS. It is currently set for 1500w max. Would it be safe to run this around 2000W or a little beyond? TIA.

burst or continuous? it'll last a few minutes continuous.

Can't tell what you've tried since you don't appear to be approaching this methodically. Maybe you did this, but plug everything back in, push the switch that usually turns on the bike, then check all of the throttle wire voltages to ground, using the pin/needle trick. Report back if you find a 5V s...

One day I plugged in the charger and nothing, it wouldn’t go into charge mode. I unplugged the charger and checked the fuse, it was blown, so I replaced it with the same exact type and amp rating. I plugged in the charger and the charger went into charge mode for about a second, but then it almost ...

It means that the BMS would not be limiting current during regen, so you have to protect the battery yourself by choosing a reasonable charging current, based on the cell specs and pack configuration.

Sparfuchs wrote: ↑

Feb 27 2021 3:15pm

I also don't know if the BMS has separate ports so i'll just post a pic of it. Hopefully someone could tell me.
Discharge Temperature Range: -20 - 60°C

The battery from your link appears to have an XLR connector for charging, and separate Anderson connectors for discharging.

I'm guessing that the middle wire coming of the switch ( inside the unit) is the negative and the other two are the positive ones, one each for the left and right indicators. So if they are like the headlight one wire in and one wire out how do I connect them?? The turn signal switch can have eithe...

The one I have is wired like this:

2 X White wires = Horn (green button)

2 X Red wires = Head Light (red button）

1 X Yellow wire= Left Turn Signal

1 X Green wire = Right Turn Signal

1 X Brown wire= Ground wire for Turn Signal Lights

Are you sure the OP wants to keep the 26" on the front? Looked to me like OP wants to go 20" on both F/R: Ahh, that makes more sense. I think when I saw the part about changing out the fork to a smaller one, I got thrown off, since that would change the geometry. Cranks will need to be pr...

I didn't ask if you plan on pedaling or not. If not, and are just going to occasionally turn the cranks, then I would go with a MXUS 3K hub, set up for a single speed freewheel. The pedal drop is more like 2", since the bottom bracket is located about 60/40 between front and rear axles. You cou...

Hi everyone. New here and need your help. I have an older (mid 1990s) Dean Titanium Bicycle that weighs about 12 lbs loaded. I’m thinking of making it an e bike. Questions: 1. It has 26” tires on it now but would like to put 20” on it. I am older and want to have my feet on the ground and also have...

webosplash wrote: ↑

Feb 23 2021 5:23pm

do you think i can just limit the draw from my controller as i've already bought everything .

Yes, and probably a more reliable way of limiting current.

Hi guys, Everything is going well, but I'm having problems to extract the round module, one of the screws sits very hard and its head is damaged( see picture). So My question is: is it possible to extract the controller without removing the left-round part? say yes!! :oops: :?: So you already check...

Bking wrote: ↑

Feb 12 2021 11:13pm

The Radcity must have 60-65 psi to get any performance at all unless you weigh 100lbs.

That's too bad. I guess that supports the observation about the bike being underpowered, if it struggles to overcome rolling resistance.

rick_p wrote: ↑

Feb 21 2021 2:04pm

Please look at the package and let me know if this is the correct resistor for the job.

Brown black gold is 1 ohm
Brown black orange is 10K ohms

Thank you for slapping me into reality. :) Jeez, I had no idea the battery cell requirements were so huge. I thought the approximate amount would be an order of magnitude lower. Okay. I'm adjusting my new speed target to 15-20 mph. I'm assuming that would lower voltage, like 36 maybe? You have the ...

Hi everyone, this is my very first post here. Great to be here! So I'm a bicycle courier. I typically pedal my road bike 8-12 hours a day. I'm looking to change that this year. I want to convert one of my two spare bicycles into an e-bike. I have a mountain bike and a cruiser bike to choose from, b...

Are any of the components mounted to the frame? Maybe a picture would help.

I am asking, I have 200 35e cells so a 20s 10p would run at 80a as each cell is rated 8a each continuous but the max output on the datasheet says max 13a so do i get an 80 a bms for my cont. rating or my max......................? Goes back to your assumptions for your used cells, since only you r ...

Wow, I'm glad I asked. I guess I'm going to be doing some climbing with the motor shut off. The hill I am concerned with turns out to be a mile long at 5% grade, with the steepest section being 9% for 0.5 mile. The donor bike I'm using has a 28tF 34tR low gear, so I might be able to keep it upright...

i cant tell for sure if this is the original order i received only the controller and i am trying it with another engine the tested engine is ok on anoter controller the wires seem ok and wont show sign of over heat Try swapping two of the big phase wires (e.g. swap green with yellow), and see if t...

Try measuring resistance between the frame and battery negative. If you see a low reading, like ohms, you have a short. If the meter shows high, more than megohms, then it's good. Your meter is very sensitive and you can get stray readings like that just from moisture or stray resistance in the con...

1. Are the BMS or contactor mounted to the frame? Maybe a floating ground vs chassis ground issue.
2. Why two threads/posts??