Search found 1648 matches

by flat tire
Nov 07 2019 12:29am
Forum: E-Bike General Discussion
Topic: Should I buy ebike online from China?? Stealth Bomber from Amazon??
Replies: 18
Views: 377

Re: Buying ebike online from China??

Unless you know what you're doing and have moderate to low expectations alibaba is not the place to buy any kind of ebike especially one you want to be reliable.
by flat tire
Nov 06 2019 7:45pm
Forum: E-Bike General Discussion
Topic: Any advantage to a mid mounted hub drive ?
Replies: 14
Views: 316

Re: Any advantage to a mid mounted hub drive ?

The advantages of your proposed setup are mass centralization, easy mechanical regearing, and if there's suspension, reduced unsprung mass. Disadvantages are an abnormally large spinning body inside the bike. You'll have less gyro influence on the handling, better packaging, and easier mounting with...
by flat tire
Nov 05 2019 4:00pm
Forum: E-Bike Non-hub Motor Drives
Topic: Cyclone 3000 vs CYC X1 Pro?
Replies: 31
Views: 975

Re: Cyclone 3000 vs CYC X1?

No way he's doing 5kw continuous on that unless he lives in antarctica.
by flat tire
Oct 24 2019 10:19pm
Forum: Battery Technology
Topic: Wire Bonding machines
Replies: 6
Views: 390

Re: Wire Bonding machines

lol, Luna can't afford a wire bonding machine and their press release is mostly useful to competitors not customers. Really though I want one of these.

The $40-60k one on alibaba is also fully automated. The actuators themselves are under $10K.
by flat tire
Oct 24 2019 10:12pm
Forum: EV Business World
Topic: Importing EBikes to Australia
Replies: 6
Views: 252

Re: Importing EBikes to Australia

You're using an entire shipping container to send 5 bikes? Yikes. Even on the small ones that's a lot of free space. Anyway it's not really that complicated. The broker will walk you thru it. You don't even have problems unloading with only 5 bikes. Also, I dunno about Aussie taxes but if it's lower...
by flat tire
Oct 24 2019 1:59pm
Forum: E-Bike General Discussion
Topic: Newby Question
Replies: 9
Views: 340

Re: Newby Question

Battery space just takes a little creativity on bikes with no space inside triangle. Mount on top of the top tube. You can easily get over 1kwh without being creative. That's where my DH bike's batteries are. Alta's motos are are more performance oriented than Zero. They sold very few before they we...
by flat tire
Oct 24 2019 1:50pm
Forum: Motor Technology
Topic: 4x less coasting resistance
Replies: 53
Views: 2569

Re: 4x less coasting resistance

Read your own thread. Luke's post on first page. Iron core losses and hysteresis.
by flat tire
Oct 23 2019 8:40pm
Forum: Motor Technology
Topic: Getting started with Field-Oriented Control
Replies: 6
Views: 406

Re: Getting started with Field-Oriented Control

To do proper traction control you would probably need a reference for the vehicle's actual ground speed and / or actual acceleration. Just limiting the spin up rate won't necessarily do what you want since different surfaces (and different approaches to gripping them) give you a very wide range of t...
by flat tire
Oct 23 2019 8:35pm
Forum: General Discussion
Topic: Over volted power tool motor. What broke? 18 volt to 36 volt Coleman
Replies: 10
Views: 383

Re: Over volt motor what broke? 18volt-36 volt

Great post very descriptive. You could have done anything from blow the fets to toast the windings to break the gearbox.
by flat tire
Oct 23 2019 8:30pm
Forum: E-Bike General Discussion
Topic: Newby Question
Replies: 9
Views: 340

Re: Newby Question

You don't want an electric motorcycle or sur-ron to ride in the city, because they're not stealthy and you can't get away with taking them to parks and stuff. And the Sur-ron is a joke for someone who rides MX. You would want an Alta or Zero, not a low quality low powered POS (regular people don't g...
by flat tire
Oct 22 2019 1:31pm
Forum: Battery Technology
Topic: Aluminum-Air Battery
Replies: 6
Views: 295

Re: Aluminum-Air Battery

To answer this question without knowing anything technical you need to understand what a press release is and why they're made. Try Manufacturing Consent.
by flat tire
Oct 21 2019 3:05pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG / CYC X1 Pro 3000w
Replies: 440
Views: 49083

Re: GNG / CYC X1 Pro 3000w

The shipping was $120 and the China tariffs don't apply to Hong Kong.
by flat tire
Oct 21 2019 3:03pm
Forum: Food and Drink
Topic: Cured my wife's anxiety and my depression with nutritional supplements.
Replies: 18
Views: 489

Re: Cured my wife's anxiety and my depression with nutritional supplements.

Unless your wife's anxiety and depression were the result of malnutrition you certainly did not cure them with nutritional supplements. This is a joke and frankly an insult to mental illness.
by flat tire
Oct 20 2019 1:53pm
Forum: E-Bike General Discussion
Topic: Cyclone Crank Freewheel/Arm Removal
Replies: 3
Views: 158

Re: Cyclone Crank Freewheel/Arm Removal

They can be pretty damn hard to remove, even with the tool which does fit.
by flat tire
Oct 20 2019 1:51pm
Forum: General Discussion
Topic: Revive LiIon pack?
Replies: 9
Views: 336

Re: Revive LiIon pack?

Don't revive dead cells or they will be waiting to catch on fire.
by flat tire
Oct 19 2019 12:58am
Forum: E-Bike Technical
Topic: Most powerful hub motor below 5lbs
Replies: 25
Views: 975

Re: Most powerful hub motor below 5lbs

If you want a lightweight kickass offroad bike that grips and surmounts obstacles like an extension of your body with reasonably well engineered moderate power the cyc x1 mid drive is possibly a solid choice if you have a backup plan for the stock controller (I've never used it but hear it sucks. RC...
by flat tire
Oct 18 2019 3:55pm
Forum: E-Bike Technical
Topic: Most powerful hub motor below 5lbs
Replies: 25
Views: 975

Re: Most powerful hub motor below 5lbs

With a weight that low you can totally forget about getting any kind of power in any hub motor commercially available. It would have to be geared with a really badass high RPM RC motor inside. As for where the high performance motors are this is a general problem in the ebike industry. All the highe...
by flat tire
Oct 18 2019 1:37pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My first ebike project
Replies: 19
Views: 673

Re: My first ebike project

I would use CYC X1 pro with at least 26" wheels if not 29". Bigger wheels are much much nicer offroad and will hold up just fine at these speeds and power levels. The low seat would work better with pegs. It will be a disadvantage all the time with pedals except for when you need to stand and move a...
by flat tire
Oct 18 2019 12:30pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My first ebike project
Replies: 19
Views: 673

Re: My first ebike project

1) your bike is possibly a little too small
2) your bike is way overbuilt for a bafang
3) your wheels are too small for riding offroad
by flat tire
Oct 18 2019 12:27pm
Forum: E-Bike General Discussion
Topic: Reliability - Are there numbers?
Replies: 20
Views: 826

Re: Reliability - Are there numbers?

You won't be able to put anything meaningful together since motor reliability depends mostly on abuse (or level of use) and luck from the factory. And you don't need to. Ebike stuff is cheap.
by flat tire
Oct 16 2019 3:03pm
Forum: Battery Technology
Topic: Charger like LiPro 6S
Replies: 16
Views: 371

Re: Charger like LiPro 6S

It's perfectly safe to split packs lol. Whether it's practical is up to you but it only takes a few seconds to reconfigure. You obviously have no experience with any of this so your judgement at this point is invalid.

Also, 10S and even 12S RC balance chargers are readily available.
by flat tire
Oct 16 2019 3:26am
Forum: Battery Technology
Topic: Charger like LiPro 6S
Replies: 16
Views: 371

Re: Charger like LiPro 6S

Easiest solution to use RC chargers with higher voltage packs is split your pack into multiples of whatever the charger can handle or less.
by flat tire
Oct 15 2019 11:21pm
Forum: E-Bike General Discussion
Topic: Ken Blocks Bicycles
Replies: 7
Views: 419

Re: Ken Blocks Bicycles

A handful of sponsored bikes he mostly doesn't ride. Oh wow.
by flat tire
Oct 15 2019 4:36pm
Forum: E-Vehicles General Discussion
Topic: Can EVs survive without subsidies ?
Replies: 45
Views: 1259

Re: Can EVs survive without subsidies ?

People don't care how long their engine lasts because it's generally understood that unless you buy a total piece of shit hoopty the engine will last longer than you own the car anyway.