Search found 105 matches

by bigoilbob
Apr 06 2019 5:40pm
Forum: EBike Technical
Topic: Shift point for Xiongda 2 speed hub with Lishui controller
Replies: 0
Views: 283

Shift point for Xiongda 2 speed hub with Lishui controller

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 ...
by bigoilbob
Apr 06 2019 11:18am
Forum: EBike Non-hub Motor Drives
Topic: Biktrix stunner reviews
Replies: 4
Views: 697

Re: Biktrix stunner reviews

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...
by bigoilbob
Apr 06 2019 8:41am
Forum: EBike Non-hub Motor Drives
Topic: Biktrix stunner reviews
Replies: 4
Views: 697

Re: Biktrix stunner reviews

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 ...
by bigoilbob
Apr 01 2019 1:06pm
Forum: EBike Non-hub Motor Drives
Topic: Biktrix stunner reviews
Replies: 4
Views: 697

Biktrix stunner reviews

Interested in the step thru with the integral rear hub. No show rooms, so any owner input would be appreciated.
by bigoilbob
Feb 17 2019 5:59pm
Forum: EBike Technical
Topic: Best geared hub motor for slow climbing
Replies: 17
Views: 2817

Re: Best geared hub motor for slow climbing

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...
by bigoilbob
Feb 16 2019 2:49pm
Forum: EBike Technical
Topic: Best geared hub motor for slow climbing
Replies: 17
Views: 2817

Re: Best geared hub motor for slow climbing

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....
by bigoilbob
Feb 16 2019 2:18pm
Forum: EBike Technical
Topic: Torque Sensing Pedal Assist for Xiongda 2 speed electric hub?
Replies: 1
Views: 247

Torque Sensing Pedal Assist for Xiongda 2 speed electric hub?

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...
by bigoilbob
Jan 20 2019 10:11am
Forum: EBike Technical
Topic: Best geared hub motor for slow climbing
Replies: 17
Views: 2817

Re: Best geared hub motor for slow climbing

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...
by bigoilbob
Aug 03 2018 7:20pm
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1662
Views: 224386

Re: 2 Speed Xiongda hubmotor

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...
by bigoilbob
Oct 03 2017 8:04am
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1662
Views: 224386

Re: 2 Speed Xiongda hubmotor

"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...
by bigoilbob
Oct 02 2017 8:45am
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1662
Views: 224386

Re: 2 Speed Xiongda hubmotor

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....
by bigoilbob
Sep 29 2017 8:15am
Forum: EBike Technical
Topic: Sturmey Archer 3 speed torque and rotational velocity rating
Replies: 8
Views: 1041

Re: Sturmey Archer 3 speed torque and rotational velocity ra

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
by bigoilbob
Sep 29 2017 8:13am
Forum: EBike Technical
Topic: Sturmey Archer 3 speed torque and rotational velocity rating
Replies: 8
Views: 1041

Re: Sturmey Archer 3 speed torque and rotational velocity ra

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...
by bigoilbob
Sep 28 2017 8:52am
Forum: EBike Technical
Topic: Sturmey Archer 3 speed torque and rotational velocity rating
Replies: 8
Views: 1041

Re: Sturmey Archer 3 speed torque and rotational velocity ra

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...
by bigoilbob
Sep 21 2017 2:19pm
Forum: EBike Technical
Topic: Sturmey Archer 3 speed torque and rotational velocity rating
Replies: 8
Views: 1041

Sturmey Archer 3 speed torque and rotational velocity rating

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...
by bigoilbob
Sep 16 2017 2:21pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Manual 2 speed hub for mini bike, without jackshaft?
Replies: 5
Views: 1325

Re: Manual 2 speed hub for mini bike, without jackshaft?

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...
by bigoilbob
Sep 14 2017 9:47pm
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1662
Views: 224386

Re: 2 Speed Xiongda hubmotor

"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...
by bigoilbob
Sep 14 2017 12:20pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Manual 2 speed hub for mini bike, without jackshaft?
Replies: 5
Views: 1325

Re: Manual 2 speed hub for mini bike, without jackshaft?

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...
by bigoilbob
Sep 14 2017 10:21am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Manual 2 speed hub for mini bike, without jackshaft?
Replies: 5
Views: 1325

Re: Manual 2 speed hub for mini bike, without jackshaft?

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...
by bigoilbob
Sep 08 2017 8:15pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Manual 2 speed hub for mini bike, without jackshaft?
Replies: 5
Views: 1325

Manual 2 speed hub for mini bike, without jackshaft?

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 ...
by bigoilbob
Aug 22 2017 3:16pm
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1662
Views: 224386

Re: 2 Speed Xiongda hubmotor

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...
by bigoilbob
Jul 11 2017 6:35pm
Forum: E-Scooter and Motorcycle Build Threads
Topic: E Mini Bike with NuVinc 171 Auto Trans
Replies: 4
Views: 2049

Re: E Mini Bike with NuVinc 171 Auto Trans

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...
by bigoilbob
Jul 03 2017 12:34pm
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1662
Views: 224386

Re: 2 Speed Xiongda hubmotor

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...
by bigoilbob
Jul 03 2017 11:22am
Forum: E-Scooter and Motorcycle Build Threads
Topic: E Mini Bike with NuVinc 171 Auto Trans
Replies: 4
Views: 2049

Re: E Mini Bike with NuVinc 171 Auto Trans

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...
by bigoilbob
Jun 29 2017 7:18pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: 2wd mini bike builds?
Replies: 7
Views: 1155

Re: 2wd mini bike builds?

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