Search found 7719 matches

by Chalo
May 12 2021 12:46am
Forum: EBike General Discussion
Topic: Fully 3D Printed DIY electric car
Replies: 55
Views: 2635

Re: Fully 3D Printed DIY electric car

goatman wrote:
May 11 2021 9:25pm
any progress?
Why would there be?
by Chalo
May 11 2021 10:17pm
Forum: Battery Technology
Topic: is there a prob in this battery diy plan with prebuid case?
Replies: 41
Views: 1674

Re: is there a prob in this battery diy plan with prebuid case?

I don't know anything about those specific cells, except that they're in the Ah capacity range you were discussing. One of my batteries uses PHEV2 format prismatic cells with threaded studs. The other one uses a pouch cell pack from a Mercedes-Benz. I'd put the reliability and safety of either one a...
by Chalo
May 11 2021 7:07pm
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1690
Views: 227872

Re: 2 Speed Xiongda hubmotor

No tubeless tires are easy to install or remove; let go of that illusion and you'll be a lot happier in the long run.

Sealant works in tubes just as well as it works in naked tires.
by Chalo
May 11 2021 6:48pm
Forum: EBike Non-hub Motor Drives
Topic: Will the Sturmey X-RF8 hub take the power ?
Replies: 1
Views: 73

Re: Will the Sturmey X-RF8 hub take the power ?

If you overgear your hub that way, it will probably hold up just fine. It's input torque, and not gross power, that matters. I think 48/20 will be an unsatisfying and not too effective bottom gear. You'll probably end up running it in low gear a lot of the time. There won't be a good climbing gear t...
by Chalo
May 11 2021 2:16pm
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1690
Views: 227872

Re: 2 Speed Xiongda hubmotor

Looks like this XD Hub motor has 19 per side, so 38 No, surely not. It's 36. You won't find faddish or proprietary system rims in 36 hole these days. And due to supply shortages, you may have a difficult time finding any 29", 36 hole, tubeless ready rims at all. My advice is get a normal rim t...
by Chalo
May 10 2021 6:39pm
Forum: EBike Non-hub Motor Drives
Topic: Tsdz2 going away?
Replies: 2
Views: 169

Re: Tsdz2 going away?

One can only hope they went back to the drawing board, and brought a mechanical engineer with them this time.
by Chalo
May 10 2021 2:29pm
Forum: Battery Technology
Topic: Ebike Battery stored for a long time
Replies: 23
Views: 629

Re: Ebike Battery stored for a long tome

I would plan for 36 v Li to give you more capacity, range and speed. :wink: Would it be safe to run a 36 volt battery without upgrading the controller? And what about the fun8 hub motor? Most 24V controllers (but not all) can use 36V. The worst that happens is something goes "pop" inside ...
by Chalo
May 10 2021 2:16pm
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1690
Views: 227872

Re: 2 Speed Xiongda hubmotor

Regarding wheel rebuilds and lacing, does it matter If I buy a 'front' wheel to rebuild for a rear hub motor? I'm looking at buying some Mavic Allroad Elite UST wheels, seems a great way to deal with tires/punctures. It is cheaper to buy two fronts. Most new production rims are tubeless compatible....
by Chalo
May 10 2021 12:58pm
Forum: Items Wanted
Topic: Book of How To Build an Ebike
Replies: 1
Views: 60

Re: Book of How To Build an Ebike

Micah Toll's profile and presence in public discussion about e-bikes isn't backed up by technical expertise. You're much better off reading through Endless Sphere.
by Chalo
May 10 2021 1:11am
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 36
Views: 821

Re: Do some motors have more/less torque with the same power levels?

Sure, run a 2-4kW motor at 5kW. What could possibly go wrong?

I wonder why they rated it 2-4kW?
by Chalo
May 09 2021 2:32pm
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1690
Views: 227872

Re: 2 Speed Xiongda hubmotor

So I found a CF front MTB fork 29er that is 110mm wide x 15mm, seems good yet I'm not sure of the 15mm part? 110 x 15mm fork is a through-axle fork. The only hub motor I know that will work with it is Grin's All Axle motor. Coincidentally, the Grin All Axle motor is a much better choice for a 29&qu...
by Chalo
May 09 2021 11:25am
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6960
Views: 546760

Re: new eZip motor

As a engineer, I can't recognize the purpose of your vise grip discombobulation. With 2 vise grips, each with multiple clamps it could operate as an emergency broken dropout backup? But as pictured it looks to serve as some Rube Goldberg lock nut, or a secure way to transport your vise grips! World...
by Chalo
May 09 2021 11:22am
Forum: Motor Technology
Topic: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?
Replies: 109
Views: 3265

Re: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?

The seals on cartridge bearings are for dust, not oil. That's why they're greased instead of oil lubricated. Please explain how you seal those against oil leakage while allowing them to turn.
by Chalo
May 08 2021 5:36pm
Forum: EScooters/EMotorcycles
Topic: Build
Replies: 26
Views: 611

Re: Build

Both those things take more finesse and coordination than you have in your feet. When I rode a motorcycle for daily transportation, I wouldn't touch the rear brake at all for days at a time. Would you have left hand rear brake, right hand front brake, right hand throttle on your emoto, Chalo? I gue...
by Chalo
May 08 2021 12:41pm
Forum: Items Wanted
Topic: littelfuse 10A 58v fuses | Australia
Replies: 1
Views: 80

Re: littelfuse 10A 58v fuses | Australia

Fuses aren't voltage specific. Get ones that are rated for the correct current and at least as much voltage as you are using.
by Chalo
May 08 2021 11:43am
Forum: EBike Technical
Topic: Does a TSDZ2 fit on a Surly Ogre?
Replies: 3
Views: 87

Re: Does a TSDZ2 fit on a Surly Ogre?

Surly bikes are top notch, no problem there. TSDZ2 uses a smaller diameter bottom bracket spindle than anyone else in the bicycle industry, makes it from low strength material, and includes a snap ring groove at the point of highest stress. Compared to that design blunder, their electronics and soft...
by Chalo
May 08 2021 11:38am
Forum: EBike Technical
Topic: Brake lever replacement
Replies: 3
Views: 99

Re: Brake lever replacement

stanleyrbennett wrote:
May 08 2021 11:14am
The motor cut-off cable is my question. I will just cut and splice those wires. Does polarity matter?
No, it's only a switch. Whether the switch is normally open or normally closed does matter, though. Most are normally open.
by Chalo
May 08 2021 10:43am
Forum: EScooters/EMotorcycles
Topic: Build
Replies: 26
Views: 611

Re: Build

Exactly, now why is the rear brake on the foot on gas bikes? Is it because the cockpit is full with clutch and front brake? Why aren't the clutch and front brakes on the feet? Both those things take more finesse and coordination than you have in your feet. When I rode a motorcycle for daily transpo...
by Chalo
May 08 2021 10:25am
Forum: EBike Technical
Topic: Does a TSDZ2 fit on a Surly Ogre?
Replies: 3
Views: 87

Re: Does a TSDZ2 fit on a Surly Ogre?

Those things break, you know.
by Chalo
May 08 2021 10:13am
Forum: EBike Troubleshooting
Topic: Dual hub motor issue
Replies: 2
Views: 75

Re: Dual hub motor issue

Use one throttle. Split the signal and ground wires and connect to both controllers, but use the +5V wire from only one controller.

Are you using a second battery for your second motor?
by Chalo
May 08 2021 10:08am
Forum: Items Wanted
Topic: Looking bob crazy tires
Replies: 1
Views: 67

Re: Looking bob crazy tires

mark 324 wrote:
May 08 2021 9:26am
Hi any know maybe where I can get bob crazy tires?or site where to buy?thanks
Schwalbe Crazy Bob? What size are you looking for? They make a bunch of them.
by Chalo
May 08 2021 10:07am
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1690
Views: 227872

Re: 2 Speed Xiongda hubmotor

What are the odds that the Xiongda 2-speed is really intended for use with normal wheels, like 26" to 700C/29" ? It's a parameter I have wondered about - manufacturers are usually silent on the subject of the internal gear ratio, am I right? Reduction gear ratios are usually 1:5 or close ...
by Chalo
May 07 2021 10:21pm
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1690
Views: 227872

Re: 2 Speed Xiongda hubmotor

A lightweight, low power hub motor is not a good match for 29 inch wheels. hi why is that ? plz insert what your opinion is based on tx Lightweight means small diameter. Low power and small diameter means low torque. Low torque in a large wheel means low thrust and low rpm. Low rpm means low motor ...
by Chalo
May 07 2021 1:52pm
Forum: EBike General Discussion
Topic: DIY candidates
Replies: 11
Views: 270

Re: DIY candidates

Aside from what Chalo said, where would you mount a battery on those bikes? Under the downtube? There's a limited amount of space there, or in a handlebar bag. You could mount a conventional rear rack on the red bike. The green bike can only have a seatpost rack (which doesn't support much weight) ...
by Chalo
May 07 2021 12:38pm
Forum: EBike General Discussion
Topic: DIY candidates
Replies: 11
Views: 270

Re: DIY candidates

Spend more time researching and getting your expectations better aligned with reality. 20 mph is plenty fast for a regular bicycle. 30 mph is a risky and uncomfortable speed for a regular bicycle, and to go faster you should start with a motorbike or a sophisticated and very expensive fully suspende...