Finally, I’ve fitted the 48V, 250W version of the TSDZ2 (ie EU-legal), with the factory firmware. It’s paired with a 12Ah battery. Is the TSDZ2 as good as a dedicated ebike? Also because the pedal sensing is built into the motor unit and it is sensing the torque you put in through the pedals, it is very good at identifying when you need that assistance and blending it in smoothly. Something you don’t get with a standard pedal sensor which generally is either off or on. Value and Conclusions

A difference of 5mm or less won't affect your gear shift but if it is bigger, you may need a new chainring with offset. Please ask us for advice. Generally, the TSDZ2 is reliable. But, problems can and do occur. Sometimes, these may manifest within the first few miles, and others may not happen until the motor has over a thousand miles under the belt. Environmental factors seem to play a part, and if you live in a wet country, it’s worth remembering that the Tongsheng isn’t waterproof.

keep your cadence high. Output power = torque * rotational speed, the higher your cadence, the more help you get from the motor. It will be based upon the condition and age of the kit, the number of miles it has done and whether any of its component parts are missing. This has nothing to do with the manufacturers' power rating, if the manufacturers say 250W then that is what they expect the users to use it for on average. In ECO mode I was hardly aware the bike was assisting however it definitely was, as a journey I take home up a steep hill on my unpowered bike always results in me needing a shower when I get home! Using this kit in ECO mode meant I still felt the ride but didn’t need a shower. In some cases, faults are caused by the way the kit has been installed or misused (eg derestricted, despite our warnings)

Torque - Motor torque determines your bike's ability to turn the pedals and increase in speed continually. An e-bike with a higher torque rating is ideal for hill climbing. However, is it possible to use the TSDZ2 to make yourself an ebike that is better for your specific needs than anything else on the market, and save a bunch of cash? Absolutely. Once you establish your need for an electric bike, take time reviewing various factors for you to find a good one. Start by comparing different models while focusing on their unique features. Renting out e-bikes from your local bike shops will allow you to dig deeper into a bike's specifications to determine whether it's a good fit or not. You can also consult with friends or bicycle vendors who are familiar with motor-powered bikes. I’ll also mentioned that Tongsheng’s firmware (ie the code that tells the motor how to behave) is a little weird. In particular, you get maximum assist at an oddly low cadence – about 60. It then tails off until at about 100 RPM you get very little help at all. This is not intuitive if you’ve mentally programmed yourself to spin up hills to stop your knees exploding; I sometimes need to change up to a harder gear if I want more help on a hill (this only works if you’re not already getting the max available power from the motor. If you are, then you need to change down to keep going. You’ll get the hang of it after a few weeks, honest). No. The 48V controller is the same. Some dealers reprogram the controller, we don't. They are programmed by Tongsheng.The paperwork required differs for each scheme and should be available from your employer or from the links below for each scheme: To find out the current chainline, measure the distance between the middle of the seat tube (it's also the middle of the bike) to the chainring's teeth. However, you must not fit a bigger ring than 44T. The TSDZ2 has 42T ring, maximum 95RPM. On bikes with cassette and 700C wheels, that is 30 mph. Zero Start Performance] — because the torque sensor can accurately detect the foot force, and give it several times in time. It can output accurate torque signal when it is at rest, with excellent zero start performance.

It’s not as good on hills as the Bafang BBS02 but is fine on moderate hills. Is the Tongsheng TSDZ2 waterproof? A word of caution; if you’ve got a warranty from the place you bought the motor from, flashing a new firmware onto it would obviously void that. Plus I believe it’s possible to tweak the firmware to make the motor non-EU-legal, which would leave you riding an uninsured, un-registered motorbike (not a good situation to be in should you ever find yourself in a collision, regardless of fault). Conclusion – would I buy it again?

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Question: Would the 250w motor give a lot less noticeable performance than the 500w motor in terms of torque etc.?