Endless Sphere

Price drop bump. It'll be on ebay for 250 shipped.

Yeah please put miles on it and see how long it holds. I broke so many BPM bpm2 clutches I decided to stop using geared motors! The last BPM was only at 1.5kw peak power! I know another member here used to have a q100h and broke the clutch as well after few months at 1kw power That shouldn't be any...

mid drive with a single speed really defeats the point of a mid drive! don't waste your money on that, when a hub with better functionality, lower weight, and less parts to break is going to be a third of the price. 700c wheels will perform a lot less stellar than 20", but there are several small ge...

Yeah, i've heard plenty of the negative experiences with the q*** motors on this forum. Kinda sad because the dual reduction ones looked tasty a while ago, but it turned out they had low efficiency ( under 80%, whereas a motor like this can peak around ~84%.. which is a very big deal considering how...

Yeah, two windings at different speeds.. one is capped on amps and should be going faster, and might actually increase in efficiency if you give it more amps and allow it to run closer to it's top speed on 48v.

You might also see different results modeling a single motor instead of two at once.

I don't have pictures of this, but i used to ride my electric bike to the hotels i worked graveyards at as second jobs, and charge in the back office. I've done this at various high end chains and never had a problem

The things you can get away with when there's no manager around

G01 is a different motor.. single reduction as far as i know. So there you go, the difference between spinning a motor up to really high RPM with two reductions versus not.. :) I wanted to go with this motor myself but i've decided to build an ebike oriented around getting as much exercise as possib...

Actually water intrusion is something i haven't thought about as a negative to this. Yeah, it does look like the motor is in the inner ring, therefore the batteries would be in the outer area, which is exactly where water likes to hang out. It might look cute but it's a nightmare from an engineering...

BMSBattery has a history of selling mid-low quality goods, charging jacked up shipping, and having questionable support at times. Not my first choice, or my second.. maybe my fourth.. if they have some item i absolutely can't find somewhere else. Here's another thing about hub motors with controller...

Well, let's get a calculator out and do the math. Correct me if i'm wrong, but i believe the current 2070 capacity record holder is the lg m42.. LG M42 @ 58g.. 3.64v nom x 4.2ah = 15.288 15.288 / 0.058 = 263.586 whrs/kg . ..which is very close to what you see in 18650 chemistries.. 250-260whrs/kg. W...

Besides, we don't necessarily need the highest energy density for a standard bike. People will be plenty happy with average cell density because they can still get 10-30 miles of range on a bike that's more than enough for their commute. When you start building fast bikes, 10-30 miles becomes 3-10 ...

I read a report that indicated they were somewhere between 300 and 333whrs/kg.
If that's true, i wonder what we're all doing with these lower density cells laying around.

Just depends on your power needs. 27mm stator width versus 35mm stator width is a pretty big difference in how much copper, magnet, and steel there is to produce power. Think of it as comparing a 2.7L engine to a 3.5... except in this case, the 2.7L engine is lighter.. but not proportionally lighter...

Se NX is the one i customized. It's got fixes for a lot of the issues that the default theme has. I forget what i did with the themes.. if i forced new users into the NX, or old ones into the NX theme. ( ps, for everyone else.. the nx theme looks like this: ) 2018-05-11 18_49_46-(2) Endless Sphere -...

Oh geez, the default theme looks bad..

fechter wrote: ↑

May 11, 2018 2:37 pm

妈的 !

Ha!

I dont know what it is, but the forum has changed. Before the borders were fixed. Now it moves with Zooming (cntrl + mouse wheel) I have changed my pc around, fresh install of o/s onto ssd so that might be why its changed for me. I'm not sure what you mean by that. Is it a problem? if so, let's see...

SOLD! Downtube 9FS folding bike. 1 year old and ~100 miles on it. Tuned and ready to ride. A few nicks and scrapes on the paint, and missing the kick stand, but otherwise all original. Why am i selling it? i wanted to build it into a high speed 20" wheeled bike with motorcycle tires, but found that...

I contacted them on alibaba and they only offered me a winding that does 28kmh ( 17mph ) for a 700c wheel. No mention of the 12.25:1 version. I had to refer to this thread to find that out. My plan.. I have a nice roadbike with drop bars and can hit 27mph on a flat pedaling sans motor if there's a s...

I like ACV so much that i did a video on it for GERD.

Just so you know.. Eric was posting under the name 'mr electric' ( i'm 100% certain ), which could explain a lot of what was said. We are not sure how he got the user's credentials, but there is a clear pattern of him using that account over the last year. By the way, you can blame Eric's ban on me....

A lot has changed. Knowing 5 languages is mandatory now. It's not fun anymore; it's work!

No, i feel the same. i'm in my mid 30's and grew up with desktop computers. Mobile devices are hobbled due to their wonky input and small screen. It results in the web being full of typos and short content. They're convenient for reading.. horrible for writing. The worst thing about mobile devices i...

Not relating to the previous feature question, but to understand better the forum usage: Is half this forum's traffic phones? Do they get the same response as computers?? (Generally mobile devices get different views)? I find phones to be very marginal for forums. Phones are good for many things, n...

Well, a single forum view page load has 50 posts. Based on the length of the text in the display, that looks like a paragraph, so 400 characters plus some overhead for the html tag. So that's 20kb of data added to each page load of a listing of posts, for a short preview of posts that are usually lo...