New Version TSDZ2 Mid Central Motor Conversion ebike Kit,Torque Sensor 36V 500W 42T Chainwheel Electric Bicycle

I used the TongSheng TSDZ2 combined with a 16.5Ah battery from Em3ev to electrify my 2016 Diamondback Haanjo Trail drop-bar bike. Total cost, about $1,000.00, not including the bike. To install the system, I had to:1. unwrap the bars and remove the shifter cables and housing for the front derailleur, break the chain and remove the front derailleur. I replaced the chain and the bar wrap.2. remove the front crank and replace it with the TongSheng motor and transmission. This is no more difficult than replacing a crank, but does require a crank tool.3. When installed, the motor and transmission are very close to the bike bottom bracket - too close to accommodate any cables or hoses passing below the bottom bracket, as they do on most road bikes. Since there is no room for the existing cables under the TongSheng motor, I had to install a replacement cable housing that runs all the way from the shifter to the rear derailleur.4. move the rear hydraulic brake line so that it runs over the bottom bracket. Fortunately, there was extra length in the brake line so no modifications required.5. mount the control panel on the handlebars. The mount is solid and the control panel went on easily. There is a lot of extra cable connecting the motor and control panel, which I doubled back and forth and secured to the brake line and rear derailleur cable housing on the down tube using multiple small zip ties. It's bulky, but looks OK.6. mount the wired speed sensor to the rear triangle, same as other bike speed sensors. The zip tie connection was fiddly and does not seem positive. I'll bet I'll have to fool with it regularly. Since this installation is permanent, I may just drill holes and bolt it in place.7. because the TongSheng motor is torque-sensing, a throttle and brake sensors are not needed, saving wires and clutter. This is a pedelec system, not an electric motorcycle. You have to pedal, just not as hard as before.8. Although not shown on the photos, the TongSheng kit includes a thumb control that attaches to the handlebar and duplicates the power controls on the control panel. The thumb control does not work for a drop bar bike, is redundant, and I did not install it. That means that my control panel has an unterminated female plug sticking out of it. I'll have to do something about that, probably pack the plug in grease and tape it to the back of the control panel.9. Of course, install the battery, which was straight forward. Again, there was a lot of extra cable that I doubled back and forth and secured to the brake line and shifter cable housing on the down tube.If the above sounds daunting, consider having your local bike shop perform the installation. I've only used the electrified bike a couple of times due to bad weather (it's January), but it worked well and allowed me to climb the steepest local hills with only moderate effort. The 36v system seems fully adequate for my needs. Be aware that big lithium ion batteries store a lot of energy and present a fire risk, particularly during charging. I charge mine in a big steel ammo can outside the house.Update: January, 2020, one year later. I liked the Tongsheng kit well enough that I bought a second one and electrified my wife's Surly Long Haul Trucker. She has about 700 miles on her bike and loves it. I have about 1700 miles on mine, including a 450 mile tour that we made in Northern Minnesota this summer. The bikes did not notice the drenching rains that we encountered and performed flawlessly. The drive systems on both bikes continue to work fine. My speedometer/odometer malfunctioned and interfered with operation of the motor. I removed the speedometer/odometer magnet and the motor works fine with immediate response, adequate power and long range. I use a separate bike computer for distance and speed. The blue gear on each bike is holding up well (Google it). If you mountain bike or otherwise mash your pedals, get the bronze gear. I've enclosed the extra wire on the downtube with 3/4 inch heat-shrink tubing, which looks good and is watertight. I ended up installing the thumb controls - I drilled holes through the thumb control for both bikes and zip-tied them to the handlebars. I find the thumb controls useful. Overall, I'm very pleased with the Tongsheng kits.Update - 2.5 years later, June 2021. Approximately 3000 miles on the bike and it’s still going strong. Zero problems, except that the speedometer/odometer still does not work. Blue gear holding up fine. Motor is still quiet. The extra weight of the battery and motor makes my bike hard on the butt over bumps, so I added a Cane Creek Thudbuster seatpost shock absorber, which helps. My battery just failed, but that’s not the bike’s fault. I rode 12 miles home without power, which was surprisingly easy - the unpowered tong sheng motor presents little, if any, additional pedaling resistance.Overall, I believe that the success of a tong sheng e-bike build is largely dependent on the quality and fit of the donor bike. Install the motor on a good, well-fitted bike and you have a good, well-fitted bike that’s easier to pedal. Install it on a clapped out, evil-handling bike and you have a clapped out, evil-handling bike that’s easier to pedal.

I quickly got it installed on a new bike friday OSATA travel bike. I did not use the bracket intended to lock into the chain stays aince I rotated the motor until it crashed to the frame and just added a small rubber pad. the assist is natural and proportional. The only problem I have is getting the gear ratios that I want with the 20 inch wheel. The spider adapter that I bought also on amazon did not work because it lacks the shaft seal for the motor and this would result in immediate failure in water. I may update after having some real miles on it.Update. I did find a set of 110mm BCD chainrings that enabled me to add a front derailleur to the bike but I had to make a bracket to get the front derailleur positioned far enough out, and the chain line is not ideal. The stock 42T sprocket has an ofsett that improves the chainline so flat chainrings that I used made it about 5mm worse. I tried using a flat 52 T sprocket in place of the chain guard and keeping the stock (offset) 42T. The chainline is better when using the small front sprocket but often the chain falls in the space bwtween sprockets when shifting. So I used flat sprockets for both 42T and 52T. Chainline could be better, but still it works ok on this bike with 2 X 8 gearing. On a couple of occasions the assist has stopped working and unplugging and replugging the battery restored normal function immediately. Since the bike I built this onto is a packable travle bike for air travel, I fashioned a battery using Ryobi 18V power tool batteries to be below the maximum 160 WH capacity for carrying on a plane. I wired 2 batteries in series to get 36 V (2S2P with 4 AH batteries). so I'm running on an 8AH 36V battery. Yesterday my wife and I rode 37 miles with 2700 ft of climb and this brought the battieries to 1/2 charge.

With some help (youTube) and some extra tools (to remove crank, axle and chain) it was quite easy to turn an old mama-bike into a modern e-bike. I use a Haneride 14,5 Ah battery and this seems more than enough for day-trips. The touring setting (2 out of 4) works very nice and makes it possible to still use the Stomey Archer 3-speed. The controle unit has some set-up too. Google it.

The install was pretty straight forward but I did google for installation instructions since there were none in the box. Shipping was a lot quicker than I thought it would be too. The motor works great and I really like the torque sensing function. I would recommend this to anyone that wants a peddle assist torque sensing motor for their bike.

I don’t know how installation could be any easier. Motor and gearbox are silent during operation. I believe a bottom bracket drive is better than a hub motor. As examples: Torque sensor and controller being integrated in the drive housing, much easier to fix a flat tire. The wiring harnesses, the connectors, are all rationally thought out and of the best quality. Overall, after maybe 75 miles of use, I feel this is a very well engineered and built drive.

Have about 100 miles now and this thing is great. My son has the Yamaha and the TSDZ2 is just as good if not better, The only thing disappointing has been this corona virus and the news about how this outbreak started but that blame doesnt rest on the people of china but on the corrupt CCG