Endless Sphere

Dang, that is impressive. Looks like part of your ride is pretty with nice patches of nature. I though I commuted a lot, but I probably only do 3000 miles a year. I blame winter! Nice photos – the woman in that last photo looks like someone I used to date in Germany. :-) That is an impressive build,...

Sort answer: range. The basic advantage is they can be transported without normal lithium hassles. But the can also be strung togetheer in various combinations. I think it is a little silly to buy the biggest battery you would ever need and carry it with you every where you go. LiGo allows you to ha...

@rolandhorth That is great Roland, sounds like you have created exactly what you need. I think a CX (or gravel) bike is the perfect platform for a fast light drop bar commuter for someone who wants to add their own pedal power. Your setup is great for someone who can do 18-20mph on their own. Its ki...

I love the mighty mini. Long before they came out with that, I asked them if they would make me one in 36v format. At the time they were not interested in 36v packs, so I had em3ev make me one (same size and watt hours, but much more Ah). I'm glad they took the idea and ran with it (at least in a 52...

I have a seatpost battery for one of my builds. with my 3lb battery it works. I wouldn't want too much weight that high. How do you attach the power feed to the backpack? I saw one design once that used magnetic coupling effectively acting as a quick disconnect to the power supply. I did do the back...

Thanks for the replies. That is good info. Looks like the ZZ faring is $200. That is a lot for an experiment that may not work (although this time of year, wind chill is a factor in the northern latitudes!).

Maybe I'm missing something. Fixed gear means that you can not coast. The hub turns, the pedal turns. Pedal backwards, the hub turns backwards. Single speed means you only have one gear, but you can coast - that is what a freewheel does. There are no motors that use a fixed gear locking ring (i.e. l...

yeah, don't skimp on batteries. Get a name brand like Panasonic or Samsung. I tend to get my stuff from Em3ev or ebike.ca.

have you ever broken one?

I have had seat post attachment racks brake, but not the 4 point attachment racks. You can't accurately say steel is stronger than aluminum. It will bend more before it breaks than aluminum. If you are concerned about cracking/breaking - go for steel.

are you talkling make or buy? Really, it all depends on the frame builder as you can get a lot of overlap depending on what the frame builder wants. From a buy perspective: Steel is maybe 2lbs heavier (or more for a heavy duty frame). tends to ride better, doesn't fail catastrophically, and can be r...

A thread on efficiency got me thinking about fairings. I ran across this: "Numbers on the topic aren’t easy to find, but some that are regularly cited are extracted from David Gordon Wilson’s Bicycling Science. He states that a rider on a touring bike equipped with a partial fairing, and his or her ...

And your ass weighs? Assuming your ass weighs 200 pounds or less, you are going at least 35 mph, running 1400w continuous. Nothing on earth will make your 35 mph more efficient, except aero. Your motor is running flat out, your controller is not pwm ing. To get better efficiency, buy a recumbent bi...

Here is my light weight speedster. The frame bag holds the battery, but it is mostly empty (or available for other cargo). I've cleaned up the wiring a little since this shot.

Nice – that is the bike I built in 2013. It is so much fun riding a fast light ebike (and super rare). I have a mountain bike version too, but I don’t use that much. Light and fast is my passion! Where did you buy the motor from? What rpm version is it? FYI, I went to the hardware store and found so...

What are you trying to do?

There are no motors that accept lock rings.

Why in the world would you NOT want to COAST with a motor?

Not many motors can accommodate a single cog.

I average 34mph in my car 20 in my ebike, and 16 when pedaling

That sounds about right, weight wise. The weight of the motor (on my rear wheel) never bothered me as far as handling went. I think you'll be OK at those speeds on a bike like yours. If you want the bike to be more agile its not the best place. But at 15mph on a dutch style bike it should be OK. Tha...

docw009 wrote: The Q100 is indeed 4.8 pounds. I've weighed mine. I bought a custom 10S-3P battery and it supports 30 miles of riding. Probably around 3 pounds and fits in a seat bag.

Me too, as soon as I could get a 350watt-hours in a 10s3p (about 2 years ago, finally!). My battery is lighter than my motor!

Another benefit of a gravel bike. They tend to have large triangles specifically to fit frame bags like that (for bikepacking). A bike from the '90s (before compact frame geometry) has lots of triangle room. Yeah, I have the classic 1993 specialized Allez racing bike (the one in the movie of that ye...

wow, quite the slash. Impressive that the sealant plugged it.

Certainly you don't want dirt getting inside the tire or near the tube where abrasion could be a problem. that and you don't want that crack to grow.

Mine weighed 10lbs and putting that weight up above the rear wheel did not do the handling any favors. It made less of a difference on a touring style bike that was designed to carry a load, less friendly to more racy frames. I've moved the battery to the main triangle, and loosing some weight (Kee...

slime tubes in my experience always seem to clog up the shrader valve after about 6 months to a year. it becomes almost impossible to drain/add air to it. pumping it up seems to work up to a point, seemingly about 30 psi in mine. but the psi gauge is waaay off on my pump, probably because it has to...

Keep in mind that the ebike.ca simulator tested the Q100 a long long time ago. There have been changes to it since then, and the efficiency numbers may have significantly. We know the Q100H and Q128 are a lot different then they were back in those days. For controllers: "torque simulating" controlle...

Three days later I was a few miles from work doing about 25mph on the repaired tire when I suddenly hear a loud noise. At first I though I'd picked up a plastic bag or piece of trash in my rear wheel. As I slowed, it became clear that it was a puncture. I slowed, confirmed the puncture, and then ro...

I've tried using the little single shot cartridges and after a couple of difficult fills and frostbite infinitely prefer a pump that gives and gives and just keeps on giving :wink: I tried CO2 cartridges a few years ago. Then I had a flat and ended up filling up the tire on the last cartridge. I fo...