If you are not mechanically inclined and/or can come up with alternative materials and methods, these kits may not be for you. I have built 2 and used a rear bike rack to install the controllers and battery. Buy extra zip ties
3 hurdles you must take into account and have options to change if needed
1. Battery size and location. You may not be able to install it where they are "normally" installed. Different mounting materials may be needed
2. The pedal assist sensor can be difficult to install. I installed 2 on the opposite side or left side of the bike. Trying to find a nut to hold it in place if there isn't one is near impossible. Will probably need to improvise
3. Placement of the controller can be tricky. I didn't use the bag included. I bought a waterproof box that you would find with fishing, camping, and boating supplies.

If you are riding on bike trails and still want to pedal this is the kit to buy. 36 volts, 500 watts. This kit has quite a bit of torque. What I really appreciate is being able to pedal at higher speeds. I have been e biking to and from work five days a week for the past five weeks. I'm loving every minute of it. For those on the fence about biking, get this kit. It will get you back out there. Update 7/29/22... Definitely glad I went with Voilamart. Got me riding again. Seems now I like to pedal!! So far this summer I've lost an inch on my waist. Glutes and quads have grown quite a bit! This is a reliable e-bike kit. Just get it...and get out and ride.

What did I like? The overall quality of this kit and its ability to convert my mountain bike into an eBike. The instructions and product videos provide enough insight to get the job done. The video mentioned that I might need to file the fork openings to fit the axle, and that was true. I filed the fork openings to accommodate the slightly oversized electric hub axle. I installed all the components included in the kit, such as brake levers and the PAS sensor. Additionally, I ordered a compatible battery from Amazon that fit the kit as if it came with it. You can find the battery here: https://www.amazon.com/dp/B091HY7JS2?ref=ppx_yo2ov_dt_b_product_details&th=1

Converting an existing mountain bike into an eBike offers numerous benefits, including the convenience of repairing it using standard bicycle parts. After the conversion, my first ride was a highly enjoyable adventure.

Edit: The PAS is not controllable; it is set to apply full power to the hub wheel when pedaling. Pedaling rate doesn't appear to affect the application of power. However, when the throttle is used, the PAS system is disabled, and I am able to control the speed and the amount of power applied. The manufacturer says that an LCD screen can be installed to replace the twist throttle, and I'm waiting for them to email the part number for the screen. The controller also needs replacement, which can be accomplished using a generic one. I'll give that a try. If I go back to the throttle control, then I will remove the PAS sensor and the supplied brake levers "“ which are not necessary if using the throttle for motor control. This will greatly simplify the installation, and if I purchase this kit again for another bicycle, I will install only the throttle.

After a careful review of the manual, it becomes evident that the 'Road-Legal switch Wires' connect to each other using their male and female connectors. Once connected, the amount of power applied to the wheel is limited, allowing the hub motor to gently engage after you commence pedaling. The top speed appears to be around 12 mph. The throttle assists in starting from a complete stop. The advantage of utilizing the limiter lies in extended range and battery life, as well as its straightforward operation; you can rely on the PAS to apply motor power that aids in pedaling. During a two-hour ride, the battery usage was minimal, as indicated by the charge indicator on the battery "“ the more accurate indicator "“ displaying 3 out of 4 LEDs. Simultaneously, the battery life indicator on the throttle remained at full charge. Disconnecting the 'Road-Legal switch Wires' permits full power to be delivered to the hub motor, resulting in top speeds of around 20 mph.

This motor exceeded my expectations. There are some big caveats in my recommendation here. This motor is smooth and quiet and can get you over the hills in great form with very little help from the rider. I mounted this kit on a homemade crank forward bike I built a while back and am using a 36v battery made up of 3 12a.h. S.l.a. Batteries. The whole bike weighs about 90 lbs but it doesn't peddle too bad even without the motor running. I've only hooked up the twist grip throttle...no p.a.s.. it will do a good 15 miles with minimal help from me and will hit 25 m.p.h. On level ground. I never expected to get so far on a charge running on $75 worth of batteries. With that said, there are serious cautions to taking on this project. The axle is very wide on this motor and a rear triangle spread of 140mm was required before I could get the wheel in place. I used a small automotive scissors jack to spread the triangle...something I've done numerous times...it works well on STEEL frames if you work carefully, trying a little and measuring progress before adding more force. The rim will need a good cloth rim tape before mounting a tire and a tube with longer valve stem would be best. The tire that was included was not one I'd try to use. I added a little lock tight to each spoke nipple after noting that they were well tensioned. I swapped the 7 speed cluster for a 5 speed as the 7th sprocket was too close to my right dropout and using a 5 speed cluster allowed a better chain line (I only seem to use the top 3gears anyway).. be sure to get a freewheel removal tool before installation of the freewheel as you may need to add spacers between the freewheel and motor body. The freewheel tool won't work unless the hole is at least 15 mm dia. to fit over the fat axle (a machine shop can drill the too...it's tough but not super hard). Once you get the wheel and cluster complete the rest of installation is pretty straightforward...wires are color coded...I didn't try to install the p.a,s. and did not connect the blue speed limiter wires together, the installation book is pretty well useless but everything works great once connected. I did run the 36v line to an in-line 20 amp automobile fuse and then through a standard 110v light switch before the red wire connected to the controller. I gave this 5 stars for value ($154 USd) and exceeding my expectation of performance with the caution that some effort is required to make it fit.

The controller box is bad