Search found 207 matches

by Balmorhea
Dec 09 2019 1:29am
Forum: E-Bike Non-hub Motor Drives
Topic: M600/M500 Crank Arm missing need help!
Replies: 12
Views: 320

Re: M600/M500 Crank Arm missing need help!

But real bike shops sell single replacement cranks all the time. Sure thing if they have spares laying around from take offs, they still however usually can't purchase singles same as manu's don't make and sell singles https://www.jbi.bike/site/search_detail.php?x1=CRANK+ARMS+%26+SETS&x2=LEFT+HAND+...
by Balmorhea
Dec 07 2019 10:58pm
Forum: E-Bike Non-hub Motor Drives
Topic: Hubs for left side drives?
Replies: 11
Views: 606

Re: Hubs for left side drives?

I now have a Velocity hub with excellent bearings. I always buy extra bearings because they may stop making them. Since when? Most bearings used in cycle components are industrially standard parts that will be available long after the parts they go into are out of production. Some of the weirder be...
by Balmorhea
Dec 07 2019 10:51pm
Forum: E-Bike Non-hub Motor Drives
Topic: M600/M500 Crank Arm missing need help!
Replies: 12
Views: 320

Re: M600/M500 Crank Arm missing need help!

Drop Dead Fred wrote:
Dec 07 2019 10:20pm
[...]but still makes no difference that one is missing and I need to purchase a set because no one is going to sell you a single.
Maybe. But real bike shops sell single replacement cranks all the time.
by Balmorhea
Dec 04 2019 10:55pm
Forum: E-Vehicles General Discussion
Topic: Motortrend article with tons of info about Tesla’s Cybertruck
Replies: 29
Views: 1148

Re: Motortrend article with tons of info about Tesla’s Cybertruck

While I've never sat in one, it looks like outside visibility is crap. From the demo ride video I saw, it looks like forward and side visibility is good, and rear visibility is pretty much nonexistent (but furnished on-screen by a rear view camera). All the better for self-entitled douchebags to ru...
by Balmorhea
Dec 04 2019 12:08am
Forum: E-Bike Technical
Topic: Can someone explain this to me?
Replies: 15
Views: 842

Re: Can someone explain this to me?

My 20s EV lipo can burst 95 amps through the shunt without blinking. ~80v. Its fun. I feel so bad for people with 30-40A max packs. My pack made of car cells is supposed to be good for 300A continuous, 500A burst. I use a 35A controller, so I use a 35A rated BMS. I haven't measured actual peak amps...
by Balmorhea
Dec 03 2019 11:58pm
Forum: Items for Sale - Used
Topic: Custom bike stolen - UK
Replies: 15
Views: 913

Re: Custom bike stolen - UK

I wonder why you presumed to know my feelings about it, if any.
by Balmorhea
Dec 03 2019 3:20pm
Forum: Items for Sale - Used
Topic: Custom bike stolen - UK
Replies: 15
Views: 913

Re: Custom bike stolen - UK

Sure. Lock Picking Lawyer probably wouldn't take any longer than that to get into my house. But never once in more than 30 years of urban cycling and bike shop life have I ever even heard of a bike thief picking a lock. There was that brief episode many years ago when it was discovered some round ke...
by Balmorhea
Dec 03 2019 1:52pm
Forum: Items for Sale - Used
Topic: Custom bike stolen - UK
Replies: 15
Views: 913

Re: Custom bike stolen - UK

Next time perhaps you will remember to use a U-lock. Even the shabbiest of those would not have given it up so easily. Next time perhaps you will remember to not be such a dick about someone's misfortune. So pointing out an easy, inexpensive measure that would have foiled the theft shown in the vid...
by Balmorhea
Dec 02 2019 2:02am
Forum: Items for Sale - Used
Topic: Custom bike stolen - UK
Replies: 15
Views: 913

Re: Custom bike stolen - UK

Next time perhaps you will remember to use a U-lock. Even the shabbiest of those would not have given it up so easily.
by Balmorhea
Dec 01 2019 9:12pm
Forum: E-Bike Technical
Topic: Spoke size pls
Replies: 4
Views: 160

Re: Spoke size pls

Hi, does anyone know of the correct spoke size for a 19" rim and MTB hub and qs205 Hub and 19" rim?Both running the standard cross pattern lacing. There's no standard lacing pattern. You need to know how many crosses per spoke. Cross-1 is usual for hub motors. The effective rim diameter varies per ...
by Balmorhea
Dec 01 2019 4:29pm
Forum: E-Bike General Discussion
Topic: Tesla S3X power consumption versus high power electric bike (estimates)... WTF
Replies: 27
Views: 810

Re: Tesla S3X power consumption versus high power electric bike (estimates)... WTF

TY for insightful replies. Looks like we need to get more aero and more efficient motors at high speeds and bigger batteries. Given that the more efficient PMDC motors are above 90% already, how much more do you think is reasonably available there? It's a dead end. Noisy, energy hogging and murdero...
by Balmorhea
Dec 01 2019 4:05pm
Forum: Items Wanted
Topic: 22 inch Speedway tires...
Replies: 4
Views: 702

Re: 22 inch Speedway tires...

What's your application? It seems like those would be inferior to a street tire on pavement, and inferior to a downhill MTB knobby on trails. Prepared dirt tracks are a specific kind of surface that you don't encounter outside of dirt track racing. If you just want something tougher than a bicycle t...
by Balmorhea
Dec 01 2019 3:06pm
Forum: E-Bike Technical
Topic: Should I fuse my battery?
Replies: 11
Views: 751

Re: Should I fuse my battery?

So if im running 48v with 750 watt motor thats 15.68a, I would be better off getting a 20a circuit breaker over a 15a wouldn't I? The motor has a 750W rating, but in fact it will burn up as much wattage as the controller can stuff into it. The controller has a maximum current rating, which may or m...
by Balmorhea
Nov 30 2019 8:14pm
Forum: E-Bike Technical
Topic: Should I fuse my battery?
Replies: 11
Views: 751

Re: Should I fuse my battery?

In the past, I've used maxi blade fuses for values up to 80A. They are cheap, and so are the holders. For what it's worth, I don't use a fuse protected pack at the moment, even though I built my own pack. Determine your pack's maximum current rating, and use the next higher value fuse for short circ...
by Balmorhea
Nov 25 2019 9:46pm
Forum: E-Bike General Discussion
Topic: singlespeed rear hub motor for 120mm spacing?
Replies: 29
Views: 1325

Re: singlespeed rear hub motor for 120mm spacing?

The difference between tabbed washers and flatted axles alone isn't much, but it's a large relative change from one to the other. The bare axle in a snug fitting slot applies torque at two points, both at a radius of about 5mm. A tabbed washer moves one of these points out to a radius of 12 or 14mm....
by Balmorhea
Nov 25 2019 1:27am
Forum: E-Bike General Discussion
Topic: singlespeed rear hub motor for 120mm spacing?
Replies: 29
Views: 1325

Re: singlespeed rear hub motor for 120mm spacing?

ive been looking to make 451 wheels and I wonder why you say they always do the smaller 406 with motors? It's a hugely more popular size, with better tire and rim availability and size range. Everything for 406 is cheaper and easier to get than 451. I assume doing the 451 rim with the hub will be f...
by Balmorhea
Nov 24 2019 9:18pm
Forum: Battery Technology
Topic: 48v Lipo pack 13s temperature
Replies: 11
Views: 561

Re: 48v Lipo pack 13s temperature

userix wrote:
Nov 24 2019 2:27am
The power cables are 8awg, which I think is too small as well.
If your power cables were the main problem, it would be the cables that got hot, and not the pack.
by Balmorhea
Nov 24 2019 6:23pm
Forum: E-Bike General Discussion
Topic: singlespeed rear hub motor for 120mm spacing?
Replies: 29
Views: 1325

Re: singlespeed rear hub motor for 120mm spacing?

Yea I know there’s longer reach brakes but one of many things. Schwinn 20” size rims being smaller I wonder if a problem for the hub and I’d rather get the slightly bigger rims instead. Any Schwinn-specific rim sizes were gone for good by 1982 at the latest. There are only two 20" bicycle wheel siz...
by Balmorhea
Nov 24 2019 12:08pm
Forum: E-Bike General Discussion
Topic: Need NuVinci Invaritorc 638 Fluid please :)
Replies: 3
Views: 484

Re: Need NuVinci Invaritorc 638 Fluid please :)

Enviolo bought all the cycling-related assets of Fallbrook. I thought this might mean the product line was gone for good, but recently I saw a bike with an Enviolo "NuVinci" hub. So they are making stuff. Anyway, that's the company to talk to about it. I don't know anything else about them. https://...
by Balmorhea
Nov 24 2019 1:59am
Forum: E-Bike General Discussion
Topic: Buying a stealth bomber from amazon
Replies: 26
Views: 1341

Re: Buying a stealth bomber from amazon

They are ok. Error codes happen Sure they do, but it doesn't exactly build confidence when they're contained in the sales literature for a multi-thousand-dollar product. Busy and highly competent people who aren't in the website business often have more important things on their plates. If I'm deal...
by Balmorhea
Nov 24 2019 1:53am
Forum: E-Bike General Discussion
Topic: singlespeed rear hub motor for 120mm spacing?
Replies: 29
Views: 1325

Re: singlespeed rear hub motor for 120mm spacing?

Hummina Shadeeba wrote:
Nov 23 2019 2:29pm
after finding the sram apex brakes don’t reach the wheel brake track
Dude. Caliper brakes come in all sizes, from 39mm reach to 120mm reach. Just get a different set of brakes. I recommend Tektro.
by Balmorhea
Nov 23 2019 7:25pm
Forum: General Discussion
Topic: Freewheel issue
Replies: 5
Views: 425

Re: Freewheel issue

Replace with a 6 speed freewheel and 6 speed shifter.

These are very cheap and durable. With electric assist, you won't miss the extra gears.
by Balmorhea
Nov 23 2019 2:25pm
Forum: E-Bike Technical
Topic: hanging a battery
Replies: 11
Views: 674

Re: hanging a battery

Note that when mounted upside down, the battery case will hold any water that manages to infiltrate. I have repaired two batteries for others that were badly damaged this way. It might be a good idea to drill a hole or two at the low point of the battery case, to drain any moisture that gets in. For...
by Balmorhea
Nov 23 2019 1:47pm
Forum: E-Vehicles General Discussion
Topic: Motortrend article with tons of info about Tesla’s Cybertruck
Replies: 29
Views: 1148

Re: Motertrend article with tons of info about Tesla’s Cybertruck

https://www.motortrend.com/cars/tesla/cybertruck/2021/tesla-cybertruck-electric-pickup-photos-info/ My opinion it’s an absolutely amazingly great truck but the appearance sucks. Compared to any other pickup truck? Gorgeous. It could look like a bashed-in dumpster and it would be much better looking...
by Balmorhea
Nov 23 2019 5:56am
Forum: E-Bike Technical
Topic: Can someone explain this to me?
Replies: 15
Views: 842

Re: Can someone explain this to me?

Yes I see..but since the battery is the main power source, why wouldnt the controller be limit itself to whatever the battery could put out? How is a controller supposed to know the limits of the battery supplying it? It's just electricity. The controller only has its own limits to restrict it. I c...