36V 48V 500W 750W Mid Motor Kit Torque Sensored With Lithium Battery Pack

38t chain ring is a must for anybody putting a mid drive on a trek mountain bike. Chainline is perfect

Recently ordered a Mid drive kit after watching a review on dude stuff YouTube channel, a great bit of kit, and miles better than I anticipated it to be! Would 100% recommend to people. Evening came within 3 days.

My first endeavour into the e-bike world in a more recent focus on improving ones health as well as desire for a new project. The performance of this mid-drive is amazing and is a breeze to install! All connections and pieces are quality! Got this kit for its torque focused motor and it really does feel more natural. The throttle is also a nice addition too for those step hills/end of a ride where your feeling knackered.

Range - Did a good test recently which came to a total of 34 miles (54km's) and most of this was done in assist 4-5 in the highest gears with a sustained speed of 20-23mph (Nice long and straight light gravel cycle route) and still had between 10-30% charge. Amazing as I am a heavy rider (currently 123kg)

Speed - Even though I am a chonky user (123kg), ones top speed achieved on a flat piece of land is 28mph, which just shows the power of this motor. So heavier people should not be put off for sure! Keeping in mind I often only go up to 20-23mph due to where I am going.

Noise - It is amazing how quiet this unit is, mostly can only hear it when going slow but this is at a soft whine. I really like how the tone changes depending on speed and use of the pedals!

So yes! Highly recommended and great value piece of kit!

Very quick delivery of both kit and battery, so I was pleased with that. I have used it on my Giant Talon MBK, and have been able to do some good rides up steep, moderately rough tracks to gain access to mountains, which was my main requirement.
My postives are -
Delivery time
Ease of fitting
Power of motor
Cool looks of control unit
My negatives are -
The control unit isn't accurate on battery power. It showed the battery as 4/5ths charged, yet it died rapidly and all of a sudden. I had scrolled to check the voltage and percentage, and it said 40%, yet it lasted no time at all after that. I will need to charge it before each ride to trust it
The yellow battery connector to the motor is way too short, (and the one on the battery very long), so that means it resides under the motor, and is therefore subject to all manner of water and crud, which has to cleaned off before you can unplug or plug back in. Had it been longer, it could have been strapped to the upper part of the downtube, out of harm's way. This I think is a major requirement for change.
There is a gear change sensor which is not mentioned anywhere, so I had to find out off the tech dept., (who did respond very quickly it must be said). I have sourced a heat-shrink/glue cap for that and the brake sensors too, to prevent moisture ingress

Overall I am happy, but a few issues would have made it 100%

I found this Tongshen middrive easy to fit and install and works really well in use.I would have liked the display slightly brighter,as it has to be positioned carefully to be able to see it clearly and in the settings it's on maximum. For a newby,better instructions are required as they are sparse at best. Really impressed with it's operation in use,bafang needs to up it's game. Would buy another.

Omg the service, response, delivery and quality is literally 100/10 got shipped within 3 to 4 days it fits perfectly, speed torque and everything is so worth the price, amazing company and highly recommend, gives all tools needed and super easy to install, couldn't be more happy!!!
If u wanna contact me about my experience with this my Gmail is [****]

Quick delivery the motor and accessories in good condition instructions on how to change things on screen could be bit more clear

The customer service was very helpful with my order and always quick to reply. The kit itself is amazing easy to install needed a bit of fiddling but this was down to the bike it was fitted on. Would recommend cheaper than an electric bike.

Absolutely fantastic, a great fit - perfect upgrade from the stock 44t. Highly recommend for anyone using the TSDZ8 motor.

Really good communication and arrived quickly. All fitted and working great!

Very good kit, you might need to find a few spacers to make a perfect fit. Very good all bolts come with thread lock (a nice touch I thought). I do 23km ride on level one assist (live in a hilly area) and battery on 80% when I finish which is good I think

Very pleased with everything, ordered this late Thursday night and it came on the Monday, then the battery a few days later, very easy to install thanks to YouTube dude stuff, this is a game changer, highly recommended this product and kirbebike, thank you 😁

Wow! What an awesome bit of kit. Well worth the little extra paid for the 750w. Arrived promptly and as described. Very easy to fit for me being mechanically minded. I didn't fit the throttle as I don't think it's needed with a peddle assist, it gives the ride a more natural feel. I had no issues at all fitting the kit, didn't even need a new chain. I also like the fact I can choose the level of assist I need and with the rear gears at my disposal it's so good at beating those hills. If you're thinking of converting your cycle to an ebike, thus is definitely the kit for you.

A little delay before the assistance kicks in but I’m happy I made this purchase. You can pedal hard if you want to reach top speed and actually still use your legs, or just use the throttle if you feeling Lazy. Really easy to install even easier to use. Now I wish it was 1000w

Great kit to convert your bike in e-bike

Very happy so far kit was very easy to fit took around 2 hrs. The only thing was the digital display t5s the manual is very confusing but after a few emails I managed to figure it out.only negative should review t5s instructions. Looking forward to many gravel rides. Thanks again very good kit at a good price Mr Steve Horsfall

Crank arms stripped within 10 miles of cycling re tapped and used a threaded insert to repair and that stripped out after 2 miles the crank arms atleast one of mines appears to be incredibly poor quality metal, replacement cranks aren’t that easy to source either. May be worth kirbie e bike trying to contact tongshen tsdz8 manufacturers and seeing if a revision can be made to the crank as I don’t seem to be the only person with this issue.

Can’t fault kirbie e bike and I’ve sourced another crank set hopefully this will get me going again

Really impressed with it all apart from the throttle but I don't think it's designed to be used as a throttle on its own as the motor can't handle the load on its own. But the peddle assist is fantastic and battery life is great. It's a tidy kit that comes packaged well and pretty simple to fit despite no instructions.
I had to contact for support as the display also came with no instructions but got sent a pdf of these later. The only thing that you'll most likely need is a new chain as you'll likely need a longer one.

I'll start by saying that I didn't actually buy my kit from kirbebike as I had it gifted to me, but this little motor is amazing. The install process is a piece of cake (unless your bottom bracket has seized, which mine had). This kit makes riding pretty much effortless, I've hit 31.8 mph on flat ground using only a 7 speed casette. The motor is quite and makes hills seem like your running over a mole hill. I'm writing this review on kirbebike as I'm a fan and supporter of Andys YouTube as well as his products, good quality stuff and Jason always provides great customer services.

Delivery was great, only took a couple of days. The mid drive was so easy to fit, which was great because I'd never done a conversion before, but the easiest thing in the world. The torque on the drive is fantastic, pulls me up steep hills i couldn't even climb on a bike as a kid, although I haven't tried it with the throttle yet as i prefer to peddle. TIP - the manual for the display unit is on kirbebike webside, mine came with the T5S.
There was some queries around max speed and what can be expected, it depends what size cassette and wheel you have, but technical help was spot on. I did have some worries about making such a large purchase online and if it was going to be what i expected, needn't have worried, the whole process was perfect

First off the ordering and delivery were easy and quick.
It’s not the first e-bike I’ve build but it was probably the easiest. The power is good with smooth delivery. Sometimes you don’t even notice. It is a really neat piece of kit.
I do wish the battery charger was a bit better as it takes ages to charge.

I recently installed the Mid-Motor Electric Conversion Kit on my bike, and I couldn't be happier with the results. The kit was easy to install, and the instructions were clear and straightforward. The mid-motor provides an excellent balance between power and control, making my rides smoother and more enjoyable.

I noticed a significant boost in performance, especially on hilly terrains. The motor is quiet, responsive, and the battery lasts a good amount of time even with regular use. It's perfect for both daily commutes and longer cycling trips.

The build quality is top-notch, and it feels incredibly sturdy. I’m really impressed with the overall performance and would highly recommend this kit to anyone looking to upgrade their bike to an electric one. This conversion kit truly exceeded my expectations!

Bought this to breathe new life into my 2021 Vitus Dee 3 speed nexus.Kit fitted on no issues.Performance is fantastic and especially on hills. The speed sensor needs careful fitting.Otherwise fit and enjoy.Best performance per £ on the market.

Brilliant! it's like having bionic legs!, fitted the kit a couple of days ago and I've covered sixty miles so far with no problems at all.
Installation was very easy with a few simple tools required and now cycling is fun once again! If you're looking for a pedal assist, get this one!