Endless Sphere

A 3mm offset can be easily overcome with a pedal washer on one side, but yes, a 6" (152mm) q factor is hard to find outside of a pure road bike. My non-e mountain bike has a 178mm q-factor which is pretty normal. I just measured my bikes and it looks like your q factor is only +5mm of my widest set...

Is it the q-factor or the offset that's an issue for you? Probably both. A BBS02 with it's 10-15mm offset on one side caused me to develop patellafemoral syndrome on the opposite leg, which was disabling until i did physical therapy. This happened within 100 miles of riding it over the course of 2 ...

okay that's interesting! coincidentally, that company is located in my area, aka goathead hell

With the new torque sensor, Q-factor is about 180mm for a 73mm BB. I measure about 90mm each side +/- a few mm. I switched from Miranda 4mm offset cranks to 0mm since the Erider BB spindle is longer than the Sempu. Q-factor for a 68mm BB is about 175mm. edit: I noticed the Erider datasheet says dri...

If you're wanting to prevent flat tires on city streets, moped/motorcycle tires are still the best way to go. The thickest bike tire i have ever measured has only 7-8mm of rubber, whereas 11mm ( beyond the average length of a goathead ) of rubber is pretty common for MC tires. MC/moped tires also te...

awesome to see you still working on this!

quick question, does one pedal have more outward offset than the other? if so, how much?

wanna know if th q factor is even.

The aotema motor is pretty inefficient as far as DDs go and the bafang is a newer higher efficiency design. Your result isn't a big surprise ;) ebikes.ca motor simulator shows us that geared motors generally lag well behind modern DDs in efficiency in a majority of situations.. https://www.ebikes.ca...

i'm interested in one sans battery still.

Hot off the presses.. John Goodenough, inventor of the original lithium battery, has a buyer and a plan to commercialize his glass based batteries.. https://www.theregister.co.uk/2020/03/02/canadian_firm_to_develop_goodenoughs_new_glass_battery/ The test cell had almost the capacity of an 18650 but ...

with double suspension it gets better, I'm not young and I use the chains to turn symbolically, and for emergencies. Yeah a 20" wheel with a moto tire and air/oil rear suspension will ride like a luxury car with the right tune... you'll only notice the small diameter of the wheel when you ride over...

geared motors freewheel in one direction, but not the other.. a dual reduction motor like a g310 will also have more drag than a single reduction one.. but should freewheel pretty well in the right direction. You just need to worry if it's got a lot of resistance both ways. That means your clutch is...

Range 20 wheel 92 km at 45.8kph, Batt Power 640W. Range 26 wheel 69 km at 54.3kph 974W. Not a good comparison, because aerodynamics affect the wattage per mph quite a bit at those higher speeds. You have to compare at the same speed, sadly. Running a smaller wheel often gives you a small hit in eff...

$0 commissions have been a thing for a while with companies like robinhood.

How they make money is still a mystery to me. AFAIK they collect some kind of interest on cash you have sitting in your reserve when it's not dedicated to stocks.

I was told at Interbike that it costs less than $10 per motor, so I am shocked and saddened that more hubs aren't the thinnest lams by default, without some special order and a huge MOQ Yeah, i heard MAC pays another $20 for their 0.27mm geared hub lams vs the 0.35mm. The few % of efficiency gain a...

spinningmagnets wrote: ↑

Mar 04 2020 6:06pm

Pic is a BionX D-series in a 20-inch rim

ooh with that diameter of stator, that thing would be a little beast off the line in a 20".. yummy!

you could build something for $1500 that doesn't weigh 100lbs; i recommend you do it

nice battery on that thang tho.

Also, does anyone have figures for the hysteresis drag torque and eddy current drag torque for the Leafbike motors? I could not find these figures published anywhere, but it would be nice to calculate how much wattage I'll need to overcome the cogging losses when riding with the drive system turned...

Likely bad hall sensors or hall sensor wiring.. Another possible problem is that the battery voltage is dropping too low on startup.. IE you have a wiring or connector problem.. or the battery is not sufficiently rated for the load the motor wants to draw at startup. You'd need some equipment to ful...

These days I try to mix in carbs in the form of berries and even potatoes sometimes but I always feel way better without them. Wish it weren't true because pizza is awesome, but it's not worth my life. Same. I've gradually worked up to handling ~150g of carbs in a meal with zero ill effect. 7 years...

I work healthcare and your former comment I really agree with; medications outside of antibiotics/antivirals don't "cure" people, they really just alter the bodies' natural healing processes in a way that's beneficial. House of God by Samuel Shem has a great line how "The only thing that really fix...

(nodding furiously) Bone broth is serious business. I eat a lot of meat on the bone and i chew on marrow and the cartilage etc as well. Many westerners see this as gross, but they'll drink bone broth and take collagen powder, which is just a hyper processed version of the same thing, and much more e...

Super awesome, it's great to see progress!!

You goofballs! :lol: Sorry about that, this thread is restored to the degree that it can be. This has happened once before to another thread while we've been running phpbb3.2.x. The weird thing is that there's always enough data to stitch the thread back together by hand in SQL, therefore we can't s...

test