Search found 988 matches

by flat tire
Feb 15 2019 6:29pm
Forum: Battery Technology
Topic: Where to buy cheap Li-pol batteries instead of Multistar?
Replies: 14
Views: 336

Re: Where to buy cheap Li-pol batteries instead of Multistar?

Multistar is really outclassed by good 18650 in terms of Wh/kg and it's not even high C rate--it sags as much as good can cells. Flux weakening more than makes up for the difference in voltage drop. The figures I quoted were at rest, not under discharge. Now for a twist, my bikes run exclusively Tur...
by flat tire
Feb 14 2019 7:57pm
Forum: Battery Technology
Topic: Where to buy cheap Li-pol batteries instead of Multistar?
Replies: 14
Views: 336

Re: Where to buy cheap Li-pol batteries instead of Multistar?

Li-Ion (18650/21700) have to be drawn down to < 3v to get the claimed capacity, That is a 25% voltage drop across the capacity range...and if you dont run them down that low, you loose out on capacity. LiPo has given 95+% of its capacity at 3.6v...only 10% voltage drop from max Bad info. 3.2v will ...
by flat tire
Feb 14 2019 5:07pm
Forum: Vendor Relations Corner
Topic: I will never buy from Luna Cycle again, if I don't have to
Replies: 1
Views: 74

Re: I will never buy from Luna Cycle again, if I don't have to

When Luna fucks up, it's not pretty. They are extremely unprofessional.
by flat tire
Feb 14 2019 1:21pm
Forum: Battery Technology
Topic: 80% charge in one hour?
Replies: 15
Views: 308

Re: 80% charge in one hour?

Well, you can accelerate (or get around) the CV charging section especially if your termination is significantly under 4.2. You do it by understanding the charge profile, shooting past your CV section in CC mode by setting a higher terminating voltage than normal, and terminating manually or by powe...
by flat tire
Feb 14 2019 1:18pm
Forum: Battery Technology
Topic: Where to buy cheap Li-pol batteries instead of Multistar?
Replies: 14
Views: 336

Re: Where to buy cheap Li-pol batteries instead of Multistar?

Multistar gets the crap beaten out of it by good 18650 packs in terms of Wh / kg, $ / kwh, and does not even have the power density to make up for it. Why would you want multistar? It's only good for putting together ad-hoc packs with little work. High discharge lipo is another story, turnigy graphe...
by flat tire
Feb 14 2019 1:02pm
Forum: E-Bike Technical
Topic: Thoughts on these Turnigy Lipos (60v 20ah pack)
Replies: 5
Views: 196

Re: Thoughts on these Turnigy Lipos (60v 20ah pack)

Use separate harnesses to put your blocks in series to run and parallel to charge with standard RC charger. 1000W charging range is no problem. Check out the icharger 308Duo. You can double up and charge / balance in 8S. Balancing should rarely be necessary if you don't discharge too low. You can al...
by flat tire
Feb 13 2019 1:44pm
Forum: E-Vehicles General Discussion
Topic: Building an electric cart
Replies: 7
Views: 259

Building an electric cart

To the other guy building a kart, make your own thread since what you're doing is totally different from what the chef is doing. And in any case, do not use lead acid since that is always a huge mistake (unless you're building a submarine). They have hub motors with small diameter, reinforced wheels...
by flat tire
Feb 13 2019 1:44pm
Forum: E-Vehicles General Discussion
Topic: Building an electric go-kart
Replies: 2
Views: 50

Building an electric cart

To the other guy building a kart, make your own thread since what you're doing is totally different from what the chef is doing. And in any case, do not use lead acid since that is always a huge mistake (unless you're building a submarine). They have hub motors with small diameter, reinforced wheels...
by flat tire
Feb 12 2019 7:11pm
Forum: E-Bike Technical
Topic: 250w to 1500w
Replies: 28
Views: 357

Re: 250w to 1500w

You will never use the limiting feature, so any 1500W kit should be within your consideration.

As mentioned above you will really wish you had full suspension, front and rear, unless your roads are perfectly smooth.
by flat tire
Feb 10 2019 3:13pm
Forum: E-Vehicles General Discussion
Topic: Building an electric cart
Replies: 7
Views: 259

Re: Building an electric cart

Not sure what you mean by "cart" but if it will carry 500KG why not use inexpensive, larger ebike hardware instead of those rinky dink overpriced skateboard motors and controllers? State your intended use and design in more detail, and someone will recommend a much simpler, and less expensive soluti...
by flat tire
Feb 10 2019 3:04pm
Forum: E-Vehicles General Discussion
Topic: E-Bike acceleration vs traffic
Replies: 6
Views: 185

Re: E-Bike acceleration vs traffic

Few main factors at play here: --traffic not trying to race you --electric torque curve and low gears give good boost off the line --your bike feels faster than it is It takes 10 or 15kw to give lower end sports cars a run for their money in the 0-20 MPH range. Light weight and accessible torque mak...
by flat tire
Feb 09 2019 2:25am
Forum: E-Bike Technical
Topic: EBike Tire Speed Rating
Replies: 35
Views: 481

Re: EBike Tire Speed Rating

30 mph won't be a problem for any bicycle tire in good condition. Use the highest recommended pressure if you want to go fast. Tires deform less and handle speed better with more pressure.
by flat tire
Feb 07 2019 4:59pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Zero SR
Replies: 17
Views: 595

Re: Zero SR

I got the bike and it had a battery issue. One of the two removable modules was dead. So now they're changing that out while I have another zero. Yeah the lack of belt capability for shock loading and off road is disappointing cuz the silence of the belt drive is compelling. I will still upgrade to ...
by flat tire
Feb 03 2019 2:52pm
Forum: E-Bike General Discussion
Topic: Which frame? Really confused.
Replies: 9
Views: 249

Re: Which frame? Really confused.

Bicycles without full suspension aren't worth motorizing except in niche cases which don't include street riding or commutes.
by flat tire
Feb 03 2019 2:50pm
Forum: E-Bike General Discussion
Topic: What are your experiences with MTBR Forums?
Replies: 4
Views: 236

Re: What are your experiences with MTBR Forums?

Mountain bikers are inherently hostile toward ebikes. This usually melts away in person as long as you don't piss them off by going "too fast" cuz they can't deny the awesome presence of a motorized bike. Online it's just some vague new enemy upsetting the status quo and spitting at those years of h...
by flat tire
Feb 02 2019 5:04pm
Forum: E-Bike General Discussion
Topic: Convince me to upgrade to a sine wave controller.
Replies: 25
Views: 875

Re: Convince me to upgrade to a sine wave controller.

Sine wave is a lot quieter with a hub motor.
by flat tire
Jan 31 2019 3:26am
Forum: E-Bike General Discussion
Topic: are there cable protectors on the market?
Replies: 7
Views: 236

Re: are there cable protectors on the market?

That's a one of the following: a targeted act, a freak catastrophe, or you're just parking your bike in such a hopelessly shitty area that you should be glad it wasn't burned to ashes. No, seriously, that sucks and is awful but it is also very unusual. If someone wants to vandalize your bike there's...
by flat tire
Jan 30 2019 4:07pm
Forum: E-Bike Technical
Topic: Best solder for shortening cables? (PAS, Motor etc)
Replies: 18
Views: 397

Re: Best solder for shortening cables? (PAS, Motor etc)

Buy a tube of flux in addition even tho you're getting rosin core. Apply the flux liberally to all metal you want to add solder to in advance. It will make getting the solder to adhere to the surfaces you need it on extra easy. Sure flux core mostly does the same thing but the limited amount of flux...
by flat tire
Jan 30 2019 8:01am
Forum: E-Bike General Discussion
Topic: Opinions about this affordable 26" ebike
Replies: 23
Views: 630

Re: Opinions about this affordable 26" ebike

Waste of money, if budget is a big consideration combine a used bike with a 1000W hub motor kit and a battery either from EM3 or a member here.
by flat tire
Jan 30 2019 7:59am
Forum: E-Bike General Discussion
Topic: Four wheeled bikes
Replies: 10
Views: 340

Re: Four wheeled bikes

Probably because 2 wheels is drastically more fun in most situations. You get to balance and lean. A 4 wheel bike makes the most sense for cargo, or something like that.
by flat tire
Jan 30 2019 7:56am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Zero SR
Replies: 17
Views: 595

Re: Zero SR

LeftieBiker wrote:
Jan 30 2019 1:34am
The bike tried to pull my arms from my sockets in Sport mode. You likely rode one in Eco. I used the Custom mode to get 80% of max power. Then it only tried to spit me off the back.
I rode it in Sport mode. It's not that fast but it's fun enough that I'm still gonna buy it.
by flat tire
Jan 29 2019 12:27pm
Forum: E-Bike Build Threads / Photos & Video
Topic: 10 kW Giant Glory 1
Replies: 30
Views: 2295

Re: 10 kW Giant Glory 1

Nice build. Everything looks well thought out. Additional benefit might be a triple crown downhill fork for a little more weight in the front. What are you doing about brakes? I have Magura MT7 on a similar bike that weighs around 85 lbs. Stopping hard from 40 or 50+ MPH is not possible because the ...
by flat tire
Jan 28 2019 7:06pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Zero SR
Replies: 17
Views: 595

Re: Zero SR

Looking into replacing the controller. The bike is pretty tame and I need it to be more wild.
by flat tire
Jan 27 2019 2:40pm
Forum: E-Bike General Discussion
Topic: Riding e bike in Netherlands
Replies: 4
Views: 174

Re: Riding e bike in Netherlands

Riding a fast ebike illegally is pretty easy but may require compromises. Here are the essentials: --Bike needs pedals, you need bicycle helmet and to look like a cyclist --Slow down to legal speed and spin pedals if you see police --Don't use a stealth bomber or other bicycle that looks like a moto...
by flat tire
Jan 27 2019 2:34pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Zero SR
Replies: 17
Views: 595

Re: Zero SR

Went and rode a FXS 6.5. Didn't touch the SR. It was a blast and that thing spins tires all the time at low speed. But the bike really wasn't very fast and most disappointingly at all I couldn't get it to wheelie. They really have the response toned down especially off the line. It's a real shame. T...