Tongsheng TSDZ2 ebike kit

Its smaller and lighter than a bosch or shimano. latest tech motor. the actual motor unit is tiny

Looks ideal for my mate who is about to have his knee refurbished. He has put a lot of weight on and will need to do some low impact exercises when it’s done.

hot does that fit to the frame and crank?

You remove the BB and it has in effect a replacement BB attached to the motor and gear unit. It slides into the BB then you put a plate on the non drive side that connects the BB end to the motor unit

I think I have a pic of the basic unit. fitting is easy tho I had to make my own anti rotation stop as the supplied one did not fit that bike well ( tho It did on my old steel roadbike)

As stock you need to pedal hard to get max power. there is an option in the menus to increase the sensitivity of the torque sensor which I have used so you get full power on moderate pedalling effort.

[strong]andybrad[/strong] wrote:

hot does that fit to the frame and crank?

there is a video of one being fitted if you go to the Whosh website

Looks good that. Getting me thinking about one for my sister with arthritis. Does it/can it run on a throttle?

DSC_0002 by TandemJeremy[/url], on Flickr

DSC_0001 by TandemJeremy[/url], on Flickr

You can get a kit with a throttle but I would not do so. If you fit a throttle you need brake and gearchange cutout switches. If yo turn the torque sensor right up then simply turning the pedals with no effort makes the motor kick out max power. I just turned mine up a bit so moderate pedalling gives full power

https://wooshbikes.co.uk/?cdkit#tsdz2

Interesting. I wonder if it would fit on my cargo bike. Do you know if spares are available, for example batteries if the range drops off.

Currently close to walking pace when carting kids up and down Edinburgh hills..

Yes. spares are available including drive gears as far as I am aware. If you are going to put it under a lot of load i believe the plastic drive gear is vulnerable but a metal one is available.

you in Edinburgh? Want to try mine? Happy to let you have a shot

https://ebikechoices.com/e-bike-parts-and-accessories-where-to-buy/#tongsheng-parts

Can you fit two of them to a tandem?

Is there anything like this aimed at more off road use? I imagine even fairly mild muddy or rocky trails would either whack the motor off altogether or at least make it seize

Horatio – I would think so given clearance under both bbs but i think it would really really confuse the torque sensing and syncing pedals might be tricky 😉

Yes, I likey.

FOG
The motor unit does not go below the chainring so rock strikes should not be an issue. I think mud would be OK but I have not opened the unit up to look at its sealing but a previous differnt manufacturer unit I had that I did strip was well sealed and I have ridden this one on road in torrential rain with no issues.

I think more likley would be stripping the internal gears from high loading like pedalling into a rock step. I think people do use them off road but I think only suitable for xc pootling rather than full on winch and plummet riding

Thanks TJ , I was really thinking of a gravel type bike so it sounds as if it will do the job.

Is there anything like this aimed at more off road use? I imagine even fairly mild muddy or rocky trails would either whack the motor off altogether or at least make it seize

I’ve had one of these motors for over a year now, and I’ve used it almost everywhere off road (and on) that I regularly rode before, including Innerleithen and Glentress black trails. I used to have it on a hardtail, but now it’s on my full sus. I often get it covered in mud without a problem, although I avoid riding through deep water.

On my bike, the motor does hang a bit lower than on “official” mid-motor e-bikes, and this can be problem, especially on rock step-ups. Having said that, I’ve accidentally hit rock steps with it about a dozen or so times without any issues.

Looking at the pics I’m guessing that one of these wouldn’t work on a bike with downtube / bottom bracket routed gear cable? If so, bit of a shame as my touring bike doesn’t get used in winter so would have been ideal for assisted winter commuting.

Yeah, gear cable issue here on mrs bike as well

However whoosh also do front/rear hub motors that are connected to torque sensing cranks(bit next to chainring) , so this looks quite appealing – ok less power etc but lighter, more tucked in and it looks like an easy retro fit with a bottle cage bolt mounted battery.

https://wooshbikes.co.uk/?tskit

I also note from tinternet that they’re now doing bbs with a built in torque sensor so I suspect that would be even neater

Having had a hub motor (until it broke) I won’t be getting another one.

Another mid-drive kit here under development. European. Scroll down to read it all. Anyone else backing it? Expecting to arrive in the next month or so.

https://www.indiegogo.com/projects/lightest-ebike-kit-your-bike-with-superpowers#/

Interesting concept but the lack of wraparound on the chainring bothers me and is there enough reduction in the drive gears?

I’ve just clicked up to 500 miles on my TSDZ2 with no issues in about 10 weeks.

Did think I had a bit of a derating issue, but it seems to have gone away.

With all the weight it’s very sensitive to tyre pressure. Drag is really noticeable if get too low

I’ve just clicked up to 500 miles on my TSDZ2 with no issues in about 10 weeks.

Any issues in the rain at all?

700 miles here commuting including a few rainy days. No issues

Ta. I’m definitely leaning this way rather than spending £700 odd quid on a new motor / wheel for my spesh turbo.

£700 for a hub-motor is an awful lot. What’s up with the original one?

Been fairly dry commutes so far. Couple of wet ones and no ill effects.

I think the frame will fail first anyway. Not many 1st generation rigs around as I think a lot snapped at the downtube due to the weird built in stress risers 😉

£700 for a hub-motor is an awful lot. What’s up with the original one?

It’s broken. And yes, it is indeed a lot, and the bike uses a proprietary battery which even if available would be £££ hence looking at sacking it all off and chucking a Tongsheng kit on one of my existing bikes.

Last thing to decide on before I order it is battery size. Probably going with 48v 14.5Ah

the ramping down effect on the tongsheng is back for me. Not tracked down why – my guess is its something to do with voltage drop? It means that using it as I do ie full power all the time range is cut as the last 1/3 of the battery is not full power – the final climb to work is at 13 – 14 mph not the full 15.5. and the last little bit of battery it gives very little assistance

I also turned up the sensitivity of the torque sensor so it gives full power at moderate effort – as stock yo have to be peddalling hard to get full power ( easy to do from sub menues)

Interesting. Did you go for branded cells in your battery or generic Chinese one? (apologies if you’ve already mentioned elsewhere in the thread)
I’ve ordered a kit now. Hopefully it’ll turn up at some point. I hate internet shopping and try and avoid it.

I got the recommended battery from woosh bikes. It looks like a generic one used in many kits. Given the price I suspect cheapo cells but it was claimed to be Panasonic

other issues with that indiegogo campaign asside, I really like this!

My kit got delivered this afternoon. Still not sure which bike I want it on but thought I’d try it on my old P7 for starters as it has top tube mounted shift cable so makes fitting a bit more straightforward. Need to connect up all of the wires and find a plug for the battery charger.

Also need to work out why the speed sensor has a double ended connector 🙂

You should have a splitter cable in the kit. The second port is for 6v lights that are switched from the head unit

I went for an E3MV battery (13.6 ah 48V) as the standard one from PSW wouldn’t fit in my frame.

Make sure you loctite the bolts up once you happy with the position of the motor.

Two torrential rain commutes in the last 2 weeks with no issues. I should probably do some maintenance on the bike generally at some point.

The derating seems to just be a feature of cheaper kits with less fancy BMS and motor controllers. Friends hub drive does it a bit as well. Mines not too bad.

Keep the tyres nice and hard!

How are you attaching the battery? You need more than just bottle bosses…

I wrapped mastic tape around the frame, jubilee clipped on 2 Topeak bottle boss adaptors (4 clips) and used these to bolt down with 4 bolts. Has been really good. I should do something to cover up the clips, but it’s a commuter so I couldn’t care less

You should have a splitter cable in the kit. The second port is for 6v lights that are switched from the head unit

Yup, sussed that now

How are you attaching the battery?

I was going to wing it and just use the 2 bottle bosses 🤣

Anyway, I’ve just ridden it around the shop and it all works. Need to work out where the hell to put all of the bloody cables!

Yeah. It’s tempting to cut the cables short but then you are screwed if you want to change the frame or move the battery. I (well a friend) soldered and heat shrunk the main battery cables so there was a good solid and watertight connection.

I’ll take some pics of my setup later, although I haven’t really sorted the remote cable out yet. It was difficult to get them setup so they weren’t just wicking water into the motor

I wouldn’t hang that much weight on 2 bottle bosses – I could see them pulling out or just damaging the frame. Mine moved slightly as it was. When you ride over anything rough it’s an awful lot of force going through the bosses

To be honest id be a bit nervous about electrifying a frame I cared about 🙂

When the rig eventually fails (I had to ‘relieve’ the EBB shell to get the motor to fit) I’ll be on the lookout for a cheap steel 29er and getting the workshop to weld a plate on the downtube to attach the battery 🙂

HoratioHufnagel
Can you fit two of them to a tandem?

You only need one, at the stoker position. Mate of mine did it after seeing TJ’s efforts on a tandem page on facebook. Bit tricky to fit the unit as it’s designed for a downtube that goes up, not a boom tube that doesn’t. Works fine though

To be honest id be a bit nervous about electrifying a frame I cared about

It’s on my 24 year old Orange for now, if it breaks it breaks. However, it isn’t the most practical bike for commuting so I am probably going to try and fit it to my touring bike. If I can’t get the under bb gear cable to work then I’ll just run a full length outer. Having mudguards and the ability to carry panniers is going to be far more sensible for the winter commute. I don’t really want to break it though so will look at ways of spreading the load from the weight of the battery.

Had a short spin up the road at the end of the day. The motor feels nice and smooth and pulls well, especially in turbo mode 🙂