What is the dimension? 20 x 20 ?

We purchased this robot and other things on Jsumo, we are very satisfied, very quick answers by email to solve our problems and we received the package in just 2 days, great job !

It is usual to receive an ebb right away after payment and this is why I am going to an electronic format rather than hard copy. I ordered mine this morning but still waiting for it, could you find a faster way to receive them ? Thank you

hss material really good.....

The motor was powerful for sumo robot, but you will need bigger wheels since this motor has square mount that is hard to be mounted into low-profile frame without overhang the small wheels. You should use > 50mm wheels for this motor. Too bad that JSumo Team didn't response to any emails, messages or chat that I sent regarding the use of this motor, i.e: Can it handle overvoltages to 15v or 24v ? Can it operate on Magnetic sumo robot?

We need better manual. Robot is very strong and good designed. At start we struggled to how to assemble but thanks to help by email. We managed to finish & program. Now works well.

Gives robot very high weight. We liked the quality and machining. I hope to order more soon.

After these motors we stopped using other brand's motors. We definitely recommend it.

Can be used for 3d printers? Are there any information about that=?

My team loved the chassis. with square nuts, assembling was very easy (we were afraid for tapping, drilling). Actually still we are working on that but we finished lots of assembling. Very good start point for sumo robots.