• This topic has 139 replies, 31 voices, and was last updated 6 months ago by Tim.
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  • Tongsheng TSDZ2 ebike kit
  • Premier Icon tjagain
    Full Member

    My kit did arrive today from Woosh ebike shop( good service) and is now fitted. The motor is tiny – like stupidly small. Motor unit weight 3.8 kg total kit weight with 575 Whr battery is 7.8 kilos

    Impressive apparent quality on opening the box. All bolts seem to be stainless steel allen screws. Not a crosshead to be seen even the tiny screws on the handlebar unit. All connectors waterproof micro multi-pin plugs bar the main battery connections which are conventional bullet fittings

    Fitting – motor unit went on well. no issues. Battery is a bottle mount one – and would not go on with the mounts as they are – but two rivnuts supplied in the kit so that was easily sorted.

    Display – rather big and clunky for my liking but loads of info on it and a smaller one is available ( but wasn’t in stock) there is also a optional remote button that sits next to the grip

    Wiring – very straightforward the only issue being the usual thing you get with kits – excess wiring to be hidden behind the motor.

    Now for the test ride. Pics to follow

    Premier Icon thisisnotaspoon
    Full Member

    Interested in these, I keep contemplating converting my OFO to electric so it could tow a trailer.

    What’s the smallest chainring it can take? I don’t want more speed it’s scary enough relying on drum brakes with human power! By my reckoning 32-14 is 15.5mph at 80rpm, so 32-19 is the equivalent in the nexus hub’s top gear.

    Premier Icon trail_rat
    Free Member

    Didn’t you already have one of these ?

    Premier Icon tjagain
    Full Member

    Trailrat – I had a sunstar which broke and no longer any spares for it.. I am being moved sites so back to the long commute ( for me) so needed an ebike again.
    TINAS – it takes a standard 5 bolt chainring – so I guess 39 will be the smallest? Mines a 42.

    Premier Icon tjagain
    Full Member

    Test ride – very quiet, very smooth power. but seems a little less than some I have ridden but hard to tell on the flat. Church Brae in Liberton will be the test.

    [url=https://flic.kr/p/2iL1fAG]DSC_0007[/url] by TandemJeremy, on Flickr

    [url=https://flic.kr/p/2iKYCLX]DSC_0005[/url] by TandemJeremy, on Flickr

    [url=https://flic.kr/p/2iKVTdF]DSC_0004[/url] by TandemJeremy, on Flickr

    [url=https://flic.kr/p/2iL1fJC]DSC_0002[/url] by TandemJeremy, on Flickr

    [url=https://flic.kr/p/2iKYCTa]DSC_0001[/url] by TandemJeremy, on Flickr

    Premier Icon transporter13
    Free Member

    That’s looks spot on… A lot cleaner install than most I’ve seen. How far do you think you can get from that 575wh battery?

    Premier Icon tjagain
    Full Member

    How long is a piece of string? I would hope for around 40 miles using a fair amount of power. Thats given my previous experience of a different but similar kit. Manufactures claim up to 70 miles but who ever gets that?

    Premier Icon simondbarnes
    Full Member

    What’s the smallest chainring it can take?

    110bcd so 34t

    Premier Icon tjagain
    Full Member

    I have been tinkering and investigating sub menus that you reach with loads of button pressing. Got the “walk mode” turned on. Not much need on a solo but hopefully this will be going on my tandem once I stop work and it could be handy there.

    also in the sub sub menus you can alter the speed limit (which I have not done) and also the power levels – again I have not done this – goes up to at least 500w I think

    finally you can swap between european mode and japanese mode – anyone got a guess what the difference is? I don’t have a clue.

    I dont think you will need that small a chain ring – seems to have loads of torque at low speed and climbs hills easily in middle gears

    Premier Icon thisisnotaspoon
    Full Member

    It was more to give it a sensible top speed, the drum brakes struggle enough with loaded panniers. Just interested in some assistance for shopping trips rather than more speed, and it’d need to fit under the chain guard!

    Premier Icon kayak23
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    Looks pretty cool. Care to share how much that setup cost?

    Premier Icon tjagain
    Full Member

    tinas – the motor cuts out at 15.5 mph and you can alter that speed limit if you want – gearing =will have no effect as it uses a speed sensor on the rear wheel. drum brakes should be plenty powerful enough anyway

    Kayak – I paid £650 from a UK supplier. Its also available on alibaba, amazon and ebay
    YOu can get it for less but I needed it this week and Woosh bikes had them in stock. YOu pays yer money and takes your chance. Alibaba is much cheaper.

    Smaller batteries would save a bit as well

    Premier Icon tjagain
    Full Member

    Longer test ride done including some significant hills. I am impressed very smooth power delivery and a smooth “ramp down” as you hit the speed limiter so it doesn’t feel like hitting a wall. Plenty of power in turbo – climbed Arthurs seat at 14 mph with moderate effort.

    It take a lot of pressure on the pedals to make the motor work hard especially in lower settings this can be adjusted.

    It Wheelies pulling away from lights on the flat in turbo!

    Not even one bar off the battery ( out of 6) in 11 miles in turbo half of which is climbing – I’m impressed with that

    Premier Icon transporter13
    Free Member

    Sounds good.
    May have to order a kit👍

    Premier Icon honourablegeorge
    Full Member

    Interesting. Does seem to sit in a vulnerable spot, but can understand why it has to be there.

    Premier Icon stumpy01
    Full Member

    Thanks for the review! This is something I could see fitting to my Wife’s bike to get her out and about a bit more.
    Once my daughter starts school (literally across the road) it would probably be convenient for her to cycle to work & this would definitely help with incentivising that!

    Premier Icon boriselbrus
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    Looks good, do you think it would be fairly mud proof?

    Premier Icon kayak23
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    Sounds good. Bit cheaper than the Bafang.

    Premier Icon tjagain
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    I would think it fairly water / mud proof but its not aimed at MTBers. Hard use you need to replace an internal plastic gear with a brass one either before or after it breaks according to t’internet

    I’ll report back once Iput some miles in

    Looks like what I thought was a power adjustment is actually the sensitivity of the torque sensor. It alter the power output you need to reprogramme it which there is ope source software out there for and you do with a modified spare cable an then you need a different screen – or buy a non eu spec one

    Premier Icon thisisnotaspoon
    Full Member

    tinas – the motor cuts out at 15.5 mph and you can alter that speed limit if you want – gearing =will have no effect as it uses a speed sensor on the rear wheel.

    More that with a 3s hub there’s only a ~100% gear range (top is about double the bottom), so I’d not want to hit the limiter untill ~80rpm in top otherwise I’d never be in anything other than bottom gear.

    Premier Icon tjagain
    Full Member

    Na – you want to be hitting the limiter at 80 rpm in middle – then you have top left for downhill. I was tempted to put it on my 3spd bike but its got properly rubbish brakes

    Yo don’t need such low gears anyway – today I was climbing Arthurs seat in 3rd and 4th – 9spd ( 11/34) cassette with a 42 chainring

    Premier Icon tjagain
    Full Member

    I have done a few more miles now – 25 to be exact. the battery is still showing full. It has 6 bars but not used any. The riding has been around hilly Edinburgh in turbo so of course only half the time has the motor been working but when it has its been working hard. I am very impressed with that as extrapolating the 70 mile claimed range seems more than possible

    Its far from effortless climbing tho – needs you to put in a fair bit of effort to make the motor work hard although that can be adjusted. However the motor clearly is putting in the power as I tried my commute today and took 4 or 5 mins off the time I used to do it with my previous ebike kit. NO traffic of course and the traffic lights were kind . I went all the way up Leith walk at 15 mph – something I could not do without assistance

    My only point of concern is that the motor power seems to reduce as you increase cadence – whether that is because you tend to reduce torque at higher cadence I am not sure or is it that it does stop working above 85 rpm ish and I am beginning to hit that. Certainly as you change to a higher gear you can feel a kick of torque. I’ll see how I go but I might increase the sensitivity of the torque sensor

    Premier Icon eddiebaby
    Full Member

    Thanks for the info. Interested in this for the rigid 29.

    Premier Icon benp1
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    I looked at one of these for my Big Dummy. Tony at Woosh said that there are some plastic internals that are not as robust as the Bafang kits, didn’t know you could get metal gears as a replacement

    Premier Icon wzzzz
    Free Member

    Theres a facebook community for these and the mods to software and internal upgrades.

    People do use them offroad a lot, though I don’t think they are in UK muddy damp conditions.

    Been tempted a few times to get one.

    Premier Icon tjagain
    Full Member

    I found in the sub menues a sensitivity adjuster for the torque sensor. turning that up a bit has made the bike feel much faster and accelerate quicker.

    Premier Icon DickBarton
    Full Member

    Any impact on battery life?

    Premier Icon tjagain
    Full Member

    A wee update. I discovered it had been fretting a bit ‘cos the anti rotation mount was not fitting well and the chainstays caught slightly on the back of the casing. A refit with some adjustment of the anti rotation mount required. Otherwise all good and still getting decent battery life and reliable.

    I tried fitting it to my old steel roadbike frame – it fitted that better than the mountainbike

    Premier Icon oldtennisshoes
    Full Member

    When the second hand bike market crashes after the current madness, I’m going to buy an old beater and fit one of these to use for nipping into town.

    Premier Icon hols2
    Free Member

    When the second hand bike market crashes after the current madness, I’m going to buy an old beater and fit one of these to use for nipping into town.

    In ten years time, the survivors will be living in sewers, eating rats.

    Premier Icon tjagain
    Full Member

    700 mile update

    I was having some issues with it reducing power on low battery and cutting out over bumps. traced to the poor main power bullet connectors. I replaced them and its all good. battery range is a bit dissapointing at around 35 miles until range anxiety sets in ( as the display started to go down to one or no bars as you put the power on but goes back to 3 when power is off) but i do ride it in turbo mode all the time and up some reasonable hills

    Overall very happy with it. Its just so nice to ride and intuitive. Its as good as the bosch or shimano motors I have ridden now I have turned up the sensitivity of the torque sensor and much nicer than a hub motor. going up leith street and liberton brae at 15 mph is great although I still pedal hardish

    Premier Icon Tim
    Free Member

    I’ve got the same derating issue on my TSDZ2, but I’m using an EM3EV battery and the connections are all soldered. It seems to be throttling power quite early in the battery life as I can get another 20 miles out of it at that point!

    Premier Icon tjagain
    Full Member

    Hmmm – I wonder if it intentional or a sign of poor batteries. No way do I get 20 miles out of it after it starts reducing power now more like 3

    Premier Icon tjagain
    Full Member

    My kit certainly does this much less since replacing the connections. I put it down to voltage drop from poor connections

    Premier Icon 5plusn8
    Free Member

    Why can’t I work the pictures? Links don’t work?

    Premier Icon tjagain
    Full Member

    I deleted them off flikr – sorry
    Ill see if i can put a couple back up

    Premier Icon 5plusn8
    Free Member

    Just one, I’de like to see what it looks like..

    Premier Icon tjagain
    Full Member

    [url=https://flic.kr/p/2jK7E7p]DSC_0004[/url] by TandemJeremy, on Flickr
    [url=https://flic.kr/p/2jK8twv]DSC_0003[/url] by TandemJeremy, on Flickr
    [url=https://flic.kr/p/2jK8u2J]DSC_0005[/url] by TandemJeremy, on Flickr

    Premier Icon tjagain
    Full Member

    One thing to note is that if you have wide chainstays it may not fit well as it can clash on the chanstays behind the BB. I had to space it out 1mm to get clearance

    Premier Icon jkomo
    Full Member

    That looks a lot less shit than I was expecting. Pretty smart!

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