Endless Sphere

My hub shifts at ~6.6 miles/hour when it is set for a 16" wheel. That seems about right. But it shifts at ~7.8 miles/hour when it is set for a 26" wheel, which is way too slow. You would think that the programmers would have tried to pick the same rotational velocity, no matter what wheel ...

spinningmagnets, follow your posts and you seem to be the most knowledgeable w.r.t. IGH stuff. Do you have knowledge of actual factory steady use torque rating for the Sturmey Archer's? Lots of good anecdotal stuff here, but the setup I'm researching could twist the SA 5 speed at ~45 ft*lb + whateve...

Thanks Deafcat, and it sure looks good. But I'm concerned with the torque rating of the Sturmey Archer hub as twisted by the (strong) mid drive and hard pedaling. I have asked both Biktrix and Sturmey Archer for the IGH torque rating (input and/or output), and Biktrix for the output mid drive motor ...

Interested in the step thru with the integral rear hub. No show rooms, so any owner input would be appreciated.

Hello don't you fear the lag between the 2 speeds? I have exactly the same concern. I would like to buy a ytw06 but at xiongda they don't look confident with this motor. I told them i want a 2wd bike with 2 48v ytw06 and they suggest another motor the aikema sx100. But jiabo75t2 is lighter. You don...

Many thanks, amberwolf. I just started a new topic to get the very answer you provided. I'll pursue it with the vendor you referred me to.

I'll try and check out this forum more often, so I'm giving instead of just taking from it.

Appreciate the help, aw....

I have my 48 volt Xiongda 2 speed hub laced to a 26" front hub, on a mountain bike. I am using the Lishui controller and have installed the cadence pedal assist on my crank, along with a thumb throttle. All works well, including my shifting. But I would like to replace my cadence senor with a p...

Its still a sport bike, both riders would be pedaling hard in a position optimized for generating power. I just want it to be roughly equivalent to a third person pedaling so they wouldn't have get off and push. I think I've decided to go for the 2-speed motor controlled by a torque sensing bb. The...

Has anyone installed this in a 20" (406) wheel? Any idea what top speed would be ? Would it hold up to using in a tandem bike where weight would be 400 pounds or so? Are you actually serious??? I just posted failure of Xiongda that was used under normal 200 lb. total load and you are asking if...

"while bonnie wrote me the motor is 12 km/h max!' querkus, I think I would read her explain more closely. Not even close. Are you sure that she was not describing the shift point for a certain voltage and wheel lacing? Ask her for the performance tables and graphs they keep on all voltage ratin...

d8veh wrote:It doesn't do any harm to bend aluminium frames. I've done it several times even on two full-suspension bikes.

Did you use your wooden plank method? Even though I got away with my steel fork spread, if I had seen/conceived of your method, that's what I would have done. I learn more from you....

d8veh, FYI, here's the thread I started for the e mini bike that is the subject of THIS thread. It includes some pix, and some boring arithmetic.

viewtopic.php?f=12&t=89188

Don't forget that you have to take the tension off the chain to change gear. That's not easy with some crank-drive systems because they run on a bit when you stop pedalling. I'd recommend a gear sensor. Thx d8veh, but if I could make this fantasy come true, then I would connect a simple 3 speed shi...

I like to frame such questions in terms of the proven design parameters of the part in question. For a 3-speed hub, reckon that a 2:1 primary ratio is at the lower end of what was intended. Then reckon that a 250 pound rider standing on the end of a 7 inch crankarm and pulling up on the bars with a...

First off, sorry for asking about this on a thread for 5 speed hubs. I'll erase that post. What are the actual, continuous duty, torque and rotational velocity ratings of the various Sturmey Archer 3 speed hubs? I've looked everywhere I can think of. Of course lots of "These are strong MF's&quo...

There are some 2-speed "single" freewheels around; most of them have only 2 tooth differences between gears. Any of them will go on your N171-- but mind you, you'll need to have a set of special tools to remove the old freewheel. The only 2-speed, manually shifted internal gear hub I have...

"My reply from Bonnie gave these power options "Rated 24V250W/36V250W/48V300W". And 100/110/135/145/155mm depending on front/back thread-on/lock-on v/disk brake." Buk, you got more complete info from Bonnie than I did. NOT a diss on Bonnie. But to answer your question, what I cal...

I think it's that your question is too unclear. When you say 'Hub' around here people start thinking hub motor. You have a shift, now you want a second shift? Overdrive. And you're right, this is too small a bike, (It would help to see a picture) so you have to abandon the idea. Can you simply come...

No responses, which I understand. I've been looking. So how'z about the next, best thing. Has anyone installed 2 rear sprockets, with enough spacing between them, and the ability to slide them back and forth, ~1/2"? Then, run a chain idler to accommodate the extra chain from the smaller sprocke...

I'm a victim of dumb luck. I was so successful in mating a 1 HP BLDC motor, and a Nuvinci 171 auto shift to a rescue mini bike frame that I have a real, really efficient, hill climber. https://endless-sphere.com/forums/viewtopic.php?f=12&t=89188 But I'm greedy, and want some more top speed with ...

So... It's been over 3 years, where is the larger 48v 30Ah version? This could replace almost every motor including BBSHD. Gear for better efficiency and longer range - climbing at 7mph, cruising at 20mph. You could achieve the ebike dream - comfortably using only one gear (44/14) for both cruising...

Looks good. Iam also make a mini bike e bike. Just wating on parts to finish it. Good for you. ASAP, please provide us with some specifics. FYI, I am in a VERY small minority by including ANY kind of multi speed transmission. If you know what you want, hill climbing or speed, you can get by without...

I have to congratulate Xiongda on their after-sales support. My controller stopped changing to low gear after three years and 4000 miles, plus, a friend broke her ring gear on a trike when she pushed it backwards. Xiongda provided me with the sideplate, ring gear and revised sun gear plus a new con...

Great build. I just changed the oil and fired up the old gas mini bike. Looking to sell it but I can't say an electric conversion didn't come to mind :roll: Thanks, but it was hard for me to figure out where to put everything. And I'm NOT dissing traditional 4 cycle/clutch builds. Even with torquev...

Here is the thread I started for my mini bike, as currently built. This is the machine I'm pondering converting to 2wd...

viewtopic.php?f=12&t=89188