Search found 25 matches

by xtinctionRebeller
Mar 31 2020 7:23pm
Forum: General Discussion
Topic: What are the crank & BB specs for Mongoose Vinson?
Replies: 1
Views: 35

What are the crank & BB specs for Mongoose Vinson?

I need to remove the cranks and bottom bracket on a Mongoose Vinson, and need to know in advance what tools I'll need. The Mongoose Vinson manual is useless. If someone has a Vinson, I'd appreciate if you could tell me what size hex/allen wrench is needed for the cranks (all mine are too small). I a...
by xtinctionRebeller
Mar 31 2020 7:59am
Forum: E-Bike Non-hub Motor Drives
Topic: Using power tool batteries (drill & string trimmer) to power a tsdz2 (48v motor)
Replies: 11
Views: 290

Re: Using power tool batteries (drill & string trimmer) to power a tsdz2 (48v motor)

I need to know how to compute watt hours. I cannot simply use the product of advertised voltage and Ah, because marketers sometimes round voltage up and sometimes not. Should I assume that "20v" is really "18v" and "40v" is really "36v" (10s), and that "52-60v" is really "52v"? Or is that still flaw...
by xtinctionRebeller
Mar 30 2020 1:05pm
Forum: E-Bike Non-hub Motor Drives
Topic: Using power tool batteries (drill & string trimmer) to power a tsdz2 (48v motor)
Replies: 11
Views: 290

Re: Using power tool batteries (drill & string trimmer) to power a tsdz2 (48v motor)

4) You can get a lot more juice for less money with an ebike battery vs the hardware store stuff I decided to put this to the test. The results show the contrary. All but one e-bike battery costs over $10/Ah. I think the results may be lying, though, because the power tool batteries mostly have low...
by xtinctionRebeller
Mar 29 2020 6:15pm
Forum: E-Bike Non-hub Motor Drives
Topic: Using power tool batteries (drill & string trimmer) to power a tsdz2 (48v motor)
Replies: 11
Views: 290

hybrids

> Going thru all the effort to make a nice mid drive bike that "only works on uphills" is just dumb. I used to have an Ahooga. These bikes are designed precisely for urban cyclists who encounter hills and don't want to break a sweat on the way to the office. They're marketed as "hybrids" -- the idea...
by xtinctionRebeller
Mar 29 2020 3:06pm
Forum: E-Bike Non-hub Motor Drives
Topic: Using power tool batteries (drill & string trimmer) to power a tsdz2 (48v motor)
Replies: 11
Views: 290

Re: Using power tool batteries (drill & string trimmer) to power a tsdz2 (48v motor)

93 Wh is not enough. That's under 10 miles of assist even if you pedal hard and go slow. I'll generally cycle ~3 miles each way. It's very hilly, but I would only use the motor on climbs. I'd figure each charge needs to serve about 3 miles climbing in total. But I do not like the sound of "pedallin...
by xtinctionRebeller
Mar 29 2020 1:57pm
Forum: E-Bike Non-hub Motor Drives
Topic: Using power tool batteries (drill & string trimmer) to power a tsdz2 (48v motor)
Replies: 11
Views: 290

Using power tool batteries (drill & string trimmer) to power a tsdz2 (48v motor)

I would like to "underdrive" a 48v motor. Is it possible? The rationale is to use batteries that I have on-hand (so the up-front project cost is low). I'd rather not buy a 36v motor and then later get the urge to upgrade to a 48v motor. I know overdriving is a thing per this post : We know there are...
by xtinctionRebeller
Mar 29 2020 8:36am
Forum: E-Bike Non-hub Motor Drives
Topic: Very short range from battery, trying to diagnose
Replies: 19
Views: 751

Re: Very short range from battery, trying to diagnose

All controllers for the TSDZ2 are exactly the same (63Vmax). The voltage and power is regulated by the controller software. When flashing modified or osf firmware it is possible to run the motor with a higher voltage and/or power than Tongsheng has done. Thanks, glad to know there's no variation on...
by xtinctionRebeller
Mar 28 2020 3:42pm
Forum: E-Bike Non-hub Motor Drives
Topic: Very short range from battery, trying to diagnose
Replies: 19
Views: 751

Re: Very short range from battery, trying to diagnose

52v does not exist from Tongsheng. Watch this video: http://mfqczy4mysscub2s.onion/watch?v=Jwi9nW2TAHg At the very end of that video, they hold up a statement from Tongsheng saying they do not make a 52v motor. As such, they also say there is no warranty on 52v kits. Did you buy an aftermarket contr...
by xtinctionRebeller
Mar 28 2020 2:40pm
Forum: E-Bike Non-hub Motor Drives
Topic: tongsheng tsdz2 speed sensor not working
Replies: 2
Views: 325

Re: tongsheng tsdz2 speed sensor not working

I probably can't help you, but I like to know if you're talking about the external speed sensor or internal one. This page claims the tsdz2 includes a built-in speed sensor (although I'm struggling to believe it, since it seems unlikely that so many users would be installing external ones to improve...
by xtinctionRebeller
Mar 28 2020 12:48pm
Forum: E-Bike Non-hub Motor Drives
Topic: Bafang & Tongsheng both have an 850c display. Are they the same? Interchangeable?
Replies: 0
Views: 82

Bafang & Tongsheng both have an 850c display. Are they the same? Interchangeable?

I noticed Bafang has an 850c and it looks very much like the one I see sold with Tongsheng TSDZ2 motors. Are they the exact same, and therefore interchangeable with either motor? Or is this a clash of different products with the same model#? There is also a DPC-14 masquerading sometimes as an 850c a...
by xtinctionRebeller
Mar 25 2020 6:59pm
Forum: Items Wanted
Topic: asymetric cranks that correct all the flaws of the Tongsheng kits (152mm-165mm)
Replies: 7
Views: 168

Re: asymetric cranks that correct all the flaws of the Tongsheng kits (152mm-165mm)

Thanks amberwolf. I'll try some of those ideas.. although what I need seems to be obscure enough I'm a bit skeptical. But worth a try.
by xtinctionRebeller
Mar 24 2020 11:25pm
Forum: Items Wanted
Topic: asymetric cranks that correct all the flaws of the Tongsheng kits (152mm-165mm)
Replies: 7
Views: 168

Re: asymetric cranks that correct all the flaws of the Tongsheng kits (152mm-165mm)

Thanks for the tips folks. @Balmorhea -- I've been unable to locate cranks that claim to do what I need at any price. And I'm sure if I found them the price would be unreasonable. I'm not even after anything high performance.. just something that will satisfy my (perhaps excessive) persnicketyness. ...
by xtinctionRebeller
Mar 24 2020 10:55pm
Forum: Vendor Relations Corner
Topic: Miranda - broken site & problems ordering parts in the US
Replies: 2
Views: 118

Re: Miranda - broken site & problems ordering parts in the US

Add to card works for me. It's marginally interesting that it works for someone. And it's almost certain that it works for someone because if it didn't work for the web admin the web admin would discover and fix the bug. Perhaps you're unaware of the poor interoperability between the more exotic us...
by xtinctionRebeller
Mar 24 2020 1:21pm
Forum: Items Wanted
Topic: asymetric cranks that correct all the flaws of the Tongsheng kits (152mm-165mm)
Replies: 7
Views: 168

asymetric cranks that correct all the flaws of the Tongsheng kits (152mm-165mm)

I'm looking for cranks with a zero offset on the right (drive) side and an offset on the left that equals what the motor adds on the right (30mm perhaps?). This is really hard to find. I found this Lekkie Buzz Bar set, but it compensates for what Bafang motors add to the right (I'm not sure if that'...
by xtinctionRebeller
Mar 24 2020 12:57pm
Forum: Vendor Relations Corner
Topic: Miranda - broken site & problems ordering parts in the US
Replies: 2
Views: 118

Miranda - broken site & problems ordering parts in the US

mirandabikeparts.com shows a huge catalog of cranks in many different geometries. The problem is the website is broken beyond belief, and it's in Europe. Broken functionality: "add to cart" brings me to an empty cart "contact us" button on the product page does nothing.. no form appears "send us a m...
by xtinctionRebeller
Mar 24 2020 12:35pm
Forum: Items for Sale - Used
Topic: TSDZ2 5 miles of use $250 OBO
Replies: 5
Views: 954

Re: TSDZ2 5 miles of use $250 OBO

In principle I could be interested.. but I need to mount this on a 100mm BB, which means I need a special extension, the price of which is normally over $100. If I can't find a more reasonably priced extension then I'll need to find a motor that includes one.
by xtinctionRebeller
Mar 24 2020 12:28pm
Forum: Vendor Relations Corner
Topic: em3ev support?
Replies: 17
Views: 3178

Re: em3ev support?

em3ev.com is a CloudFlare website, which for me is reason enough to avoid them.
by xtinctionRebeller
Mar 23 2020 4:45pm
Forum: E-Bike Non-hub Motor Drives
Topic: (solved) Different kinds of square taper BBs: JIS, ISO -- which is TSDZ2? Data is conflicting
Replies: 0
Views: 324

(solved) Different kinds of square taper BBs: JIS, ISO -- which is TSDZ2? Data is conflicting

I need to know what specs to look for when replacing a Tongsheng TSDZ2 crank. Everyone says "square taper" and stops there, but there are 3 2 different kinds of square taper: JIS = 12.65mm ( compatible with Bafang ) ISO = 12.33mm BNI = ? ( compatible with Bosch e-bikes ) The measurements above are "...
by xtinctionRebeller
Mar 23 2020 3:35pm
Forum: E-Bike Non-hub Motor Drives
Topic: (solved) (Tongsheng) Left crank arm needs to be ~3mm longer than the right <= false
Replies: 10
Views: 238

Re: (Tongsheng) Left crank arm needs to be ~3mm longer than the right

Thanks! This simplifies my effort in getting a proper kit ordered. I'm glad I can order different brands and angles on the cranks and expect a match as long as the spec is the same length.
by xtinctionRebeller
Mar 23 2020 3:19pm
Forum: E-Bike Non-hub Motor Drives
Topic: (solved) (Tongsheng) Left crank arm needs to be ~3mm longer than the right <= false
Replies: 10
Views: 238

Re: (Tongsheng) Left crank arm must be ~3mm longer than the right

Pedal circle diameter is independent from offset dimension. 170mm crank arms spin the same circle diameter regardless of offset. Imagine tying a pole to a pencil using a string that's 170mm, and draw a circle like this: https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Ftse1.mm.bing.net%2F...
by xtinctionRebeller
Mar 23 2020 2:24pm
Forum: E-Bike Non-hub Motor Drives
Topic: (solved) (Tongsheng) Left crank arm needs to be ~3mm longer than the right <= false
Replies: 10
Views: 238

(solved) (Tongsheng) Left crank arm needs to be ~3mm longer than the right <= false

The stock crank arms for the Tongsheng TSDZ2 have flawed geometry in 3 respects: The Q-factor is unusually large ~210-270mm, depending on who you ask and depending on the bottom bracket width. The offsets are asymetric due to the reduction gear, which puts the midpoint of the pedals to the right of ...
by xtinctionRebeller
Mar 22 2020 5:26pm
Forum: E-Bike Non-hub Motor Drives
Topic: Tongsheng crank arms are for riders of height 5'9" - where can we get smaller cranks?
Replies: 13
Views: 349

Re: Tongsheng crank arms are for riders of height 5'9" - where can we get smaller cranks?

Thanks Cavi. It says the offset introduced by BBS (Bafang) motors is 18mm. Does anyone know if it's the same offset for Tongsheng motors? After watching this video, I might be a bit more open to the idea of 152mm crank arms: http://qklhadlycap4cnod.onion/watch?v=7GlIu0Znfcs Would be useful to be abl...
by xtinctionRebeller
Mar 20 2020 4:59pm
Forum: E-Bike Non-hub Motor Drives
Topic: Tongsheng crank arms are for riders of height 5'9" - where can we get smaller cranks?
Replies: 13
Views: 349

Re: Tongsheng crank arms are for riders of height 5'9" - where can we get smaller cranks?

I appreciate the advice so far. I've looked at these suggestions: Miranda - they have a huge number of options that seem ideal for addressing Tongsheng's cockeyed asymetric and large Q factor. I think I can get whatever crank arm length I want and perhaps with a reduced Q factor on the right to comp...
by xtinctionRebeller
Mar 19 2020 4:18pm
Forum: E-Bike Non-hub Motor Drives
Topic: Tongsheng crank arms are for riders of height 5'9" - where can we get smaller cranks?
Replies: 13
Views: 349

Re: Bafang crank arms are for riders of height 5'11" - where can we get smaller cranks?

The study you listed refers to non-assisted road bikes. This topic has been discussed ad nauseam for years & to my knowledge hasn't been definitively proven. Regardless, ebikes don't need as long cranks as pedal bikes & if you are using your's off-road, the shorter arms (I use 155 & I'm also 5'11")...
by xtinctionRebeller
Mar 17 2020 1:33pm
Forum: E-Bike Non-hub Motor Drives
Topic: Tongsheng crank arms are for riders of height 5'9" - where can we get smaller cranks?
Replies: 13
Views: 349

Tongsheng crank arms are for riders of height 5'9" - where can we get smaller cranks?

According to case studies , these are the optimum crank arm lengths given a rider's height: [table] [tr][th]rider height[/th][th]optimal crank length (mm)[/th][/tr] [tr][td]6’0" (1828mm)[/td][td]177.5[/td][/tr] [tr][td]5’11" (1803mm)[/td][td]175[/td][/tr] [tr][td]5’10" (1778mm)[/td][td]172.5[/td][/t...