Search found 811 matches

by Balmorhea
Aug 13 2020 1:46am
Forum: E-Bike General Discussion
Topic: is this site legit? recycles-ebike.com
Replies: 21
Views: 2737

Re: is this site legit? recycles-ebike.com

theloadedquestion wrote:
Aug 12 2020 5:00pm
Wish they didn't have literally every battery they offer limited to 30A continuous. Wonder why no variety?
Commitment to a single type of BMS maybe? 30A limit might drive away the riff raff who’ll burn down your products and then make it somehow your problem.
by Balmorhea
Aug 12 2020 2:29pm
Forum: E-Bike General Discussion
Topic: I need help, as i dont have anywhere to ask, and no one to help me
Replies: 146
Views: 3484

Re: I need help, as i dont have anywhere to ask, and no one to help me

Lets say 6t winding is a good winding for start and stop, i mean it comes as a first option. So its good for a quick start stop all day, thats what i need. Then i use 48v 24.5ah battery with 40amp bms , i need speed up to 50km h , what would be the difference bezween 1000w and 1500 w ? 1500W is a l...
by Balmorhea
Aug 12 2020 12:23pm
Forum: E-Bike General Discussion
Topic: hit a pothole, hard.
Replies: 9
Views: 217

Re: hit a pothole, hard.

docw009 wrote:
Aug 12 2020 12:19pm
You're the only one that can tell, but is there a slight dent ubder the "LB"?
That’s the flat spot I’m talking about. It looks like the rim buckled badly enough to bulge the sidewalls out.

The spoke under the buckled section is probably loose.
by Balmorhea
Aug 12 2020 12:03pm
Forum: E-Bike General Discussion
Topic: I need help, as i dont have anywhere to ask, and no one to help me
Replies: 146
Views: 3484

Re: I need help, as i dont have anywhere to ask, and no one to help me

dont understand how is 1000w https://www.leafbike.com/products/diy-bike-conversion-kit/26-inch-48v-52v-1000w-rear-wheel-electric-hub-motor-kit-1067.html faster than 1500w?? https://www.leafbike.com/products/diy-bike-conversion-kit/26-inch-48v-52v-1500w-rear-electric-hub-motor-kit-1181.html Thats th...
by Balmorhea
Aug 11 2020 2:03am
Forum: E-Bike General Discussion
Topic: Why are geared motors worse than direct drive for climbing hills?
Replies: 52
Views: 2048

Re: Why are geared motors worse than direct drive for climbing hills?

For torque arms, it doesn’t give any advantage to have harder or stronger arms than the axle. It just means you’ll beat up the axle before the torque arm.
by Balmorhea
Aug 10 2020 6:32pm
Forum: E-Bike General Discussion
Topic: hit a pothole, hard.
Replies: 9
Views: 217

Re: hit a pothole, hard.

It’s a flat spot bashed into the rim. Under other circumstances, it could be a bulge in the rim making contact with the brake pads, but judging from the photo it looks like you don’t have rim brakes. The remedy is to relace the wheel with a new rim. The best future preventive is a bigger tire with m...
by Balmorhea
Aug 10 2020 5:37pm
Forum: General Discussion
Topic: Hit an animal last night!
Replies: 104
Views: 21476

Re: Hit an animal last night!

DenWillson wrote:
Aug 10 2020 10:09am
Always wear a helmet.
Which will protect your spine? Must be some helmet.
by Balmorhea
Aug 10 2020 5:19pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1600
Views: 226816

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Hickbeard wrote:
Aug 10 2020 8:26am
So I've figured out (as in I watched a YouTube video) how to do it. Is there anywhere that says what the other settings are?
What display are you using? It’s a little different for different versions.
by Balmorhea
Aug 10 2020 5:50am
Forum: E-Scooter and Motorcycle General Discussion
Topic: 18" wheel on a scooter?
Replies: 1
Views: 59

Re: 18" wheel on a scooter?

“Scooter” means a few different things. Without knowing which category of scooter you are talking about, it’s hard to advise you. If you mean a scooter that uses bicycle wheels and tires, 20” is a much more useful and versatile size than either 16” or 18”.
by Balmorhea
Aug 10 2020 5:41am
Forum: E-Bike General Discussion
Topic: E-bike for 2 grand ?
Replies: 23
Views: 336

Re: E-bike for 2 grand ?

You are better off converting a pedal bike. Turn-key e-bikes usually have problems like proprietary/restricted electronic systems, poorly designed and difficult to maintain wiring harnesses, batteries slotted into confined spaces so they don’t replace or upgrade easily, and cheaper/nastier parts tha...
by Balmorhea
Aug 09 2020 11:21pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My econo-e-bike
Replies: 70
Views: 12223

Re: My econo-e-bike

I just had to shorten some Mr Tuffys to fit 20” fat tires. They didn’t put up as much resistance to being cut with scissors as a business card. I would have a very hard time believing they deflected anything. I think you just got lucky. I’ve seen it a few times before— a bike comes into the shop wit...
by Balmorhea
Aug 09 2020 8:50pm
Forum: Items Wanted
Topic: WTB Samsung 20R cells
Replies: 4
Views: 73

Re: WTB Samsung 20R cells

By my reckoning, 506 of those cells would give a cumulative 40kW at their rated maximum continuous discharge.

Is that why you want 20R cells instead of something with better energy density? And if so, why wouldn't you use automotive cells with a larger format and lower cost per Wh?
by Balmorhea
Aug 09 2020 6:55pm
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 5824
Views: 494671

Re: new eZip motor

marty wrote:
Aug 09 2020 5:30pm
All my electric bikes have dead batteries.
That seems like a fixable problem.
by Balmorhea
Aug 09 2020 6:34pm
Forum: E-Bike General Discussion
Topic: Enduro type frame front fork selection.
Replies: 37
Views: 2997

Re: Enduro type frame front fork selection.

the12be wrote:
Mar 02 2017 3:05pm
if you try to turn a 26 inch wheel at 100 mph it is spinning at 5000rpm
100 mph road speed for a 26” wheel is about 1600 rpm.
by Balmorhea
Aug 09 2020 6:20pm
Forum: E-Bike General Discussion
Topic: Unbelievable Weird Noise Elimination Solution
Replies: 6
Views: 196

Re: Unbelievable Weird Noise Elimination Solution

I took a step back and considered that the issue, since it is not repeatable without a load (i.e. upside down there is no issue ever), may be a dynamic resonance issue somewhere. Realizing that the most likely part susceptible to this may be the spokes I refocused on them. It turns out that my fron...
by Balmorhea
Aug 09 2020 4:18pm
Forum: E-Bike General Discussion
Topic: Basics for Newbie///
Replies: 38
Views: 919

Re: Basics for Newbie///

Can I use the current Grin controller and LCD with these packs, which are similar to yours? And, do amp hours make a diff for small 250 watt Bafang geared front hub motor? If the Grin controller is compatible with your new battery's voltage, and you don't demand more current from the battery than i...
by Balmorhea
Aug 09 2020 3:59pm
Forum: Battery Technology
Topic: downsides to a higher voltage
Replies: 17
Views: 313

Re: downsides to a higher voltage

Something's fishy about your simulator graphs, because the power output isn't the same. When you reach the capped speed, you'll only be getting enough motor power to maintain that speed-- which is the same amount of power regardless of system voltage.
by Balmorhea
Aug 09 2020 3:23pm
Forum: Battery Technology
Topic: downsides to a higher voltage
Replies: 17
Views: 313

Re: downsides to a higher voltage

Nevertheless voltage seems all about attaining a top speed, while the main downside may be risk of overheating smaller motors? The simulator shows the 52v (vs 36v) overheating the Bafang G311 at anywhere above 30% throttle -- does this make sense, even with less current through the motor at similar...
by Balmorhea
Aug 09 2020 2:23am
Forum: Battery Technology
Topic: downsides to a higher voltage
Replies: 17
Views: 313

Re: downsides to a higher voltage

Any given motor is going to have a specific RPM per volt. So match the motor and your battery voltage to get the speed you want, within the power that your system can provide. In a well matched system, 50% of your no-load speed is where you get the highest power output, and 80% of the no-load speed ...
by Balmorhea
Aug 08 2020 10:27pm
Forum: E-Bike Non-hub Motor Drives
Topic: Using two drive chains to one hub - one on each side?
Replies: 43
Views: 7892

Re: Using two drive chains to one hub - one on each side?

With these big bottom bracket shells how possible would it be to put chainrings on both sides and make Bi-drive w freewheel in the bottom bracket essentially. So chainrings not fixed to the cranks and would only engage when pedaled. The goal bring use the bb shell to support the jack shaft and simp...
by Balmorhea
Aug 08 2020 10:18pm
Forum: E-Bike General Discussion
Topic: What E-Bike Rack do you use?
Replies: 9
Views: 451

Re: What E-Bike Rack do you use?

lando14 wrote:
Sep 30 2019 11:36am
How do you guys transport your E-Bike? Do you use a bike-rack on your car?
It's not dignified to carry a bike in a car. It adds insult to injury.

My bikes tend to make their objections known by biting and gnawing the motor vehicle that tries to transport them.
by Balmorhea
Aug 08 2020 3:17am
Forum: E-Bike Non-hub Motor Drives
Topic: Using two drive chains to one hub - one on each side?
Replies: 43
Views: 7892

Re: Using two drive chains to one hub - one on each side?

maybe get this bike and get the hub lathed? https://jrbicycles.com/products/subrosa-2021-malum-dtt-26-bmx-freestyle-bike-matte-raw?_pos=3&_sid=3e59bad85&_ss=r I would have tried it during my days as a machinist, but it never came to that. If the axle bearing is the same on both sides, it's plausibl...
by Balmorhea
Aug 08 2020 3:12am
Forum: E-Bike Non-hub Motor Drives
Topic: Using two drive chains to one hub - one on each side?
Replies: 43
Views: 7892

Re: Using two drive chains to one hub - one on each side?

https://www.amazon.com/Black-Ops-14mm-A ... B07BYFRGQD

Image

These are 3/8"-26 on the inside, like most 3/8" axles. Coaster brake hubs and older American BMX axles tend to be 3/8"-24. Profile might use 3/8"-24, but I don't know that for a fact.
by Balmorhea
Aug 08 2020 12:29am
Forum: E-Bike Non-hub Motor Drives
Topic: Using two drive chains to one hub - one on each side?
Replies: 43
Views: 7892

Re: Using two drive chains to one hub - one on each side?

Trying to find something “dual-drive” that has a 14mm axle so as to be able to use the many bmx frames out there these days with 14mm dropouts is a goal for me There were many RH/LH BMX hubs with 14mm axles in the mid to late ‘90s. They haven't been made in a long time, but there are still some aro...