The motor's torque is higher than usual. And resistant to impacts which is Ok. But my main problem is fitting to 5cm for minisumo. I had to cut motor's shaft nearly half.

I am using them with my 12mm old pololu motors. They are superb. They stick to surface very well. Also I had similar silicone wheels but these are best that I can say easily.

First of all, the code that they send is very easy to understand, it needs little tweak. I am developing with my students. Chassis is very rigid. The board is very easy to learn and can be added more sensors (which is good for future improvements). The design and speed of robot gives you a high-quality robot kit feeling. Also very powerful. We will see at our competition. I recommend to all robot competitors. starter.

Best wheels for sumo robots! Before we were using lynxmotion sponge wheels, but this wheels jumped robot's power to very high level. No need to extra universal hub. They fit directly to our titan 1000 rpm motors.

I use it 4 wheel line follower, they track the route great. And stackable design is very usefull. I tried 3-3 wheels at each side, but unfortunately it made a little weight (traction and manuevering is increased where as)

I am using them at my minisumo (as usual). All opponent robots defeated easily. They hold the ground very well. And don't need to use any extra coupler, hub etc.. nice. I clean with alchol and voila! very slick traction.

This ebook opens a new page in my sumo robots. That made me notice many many mistakes. Getting help from a JSumo, for new projects also priceless.

Recommended!

When will be restocked? I bought last piece months ago and using. For my new project I want to buy more but still waiting. Please be fast Jsumo :)

I won Robofest 2016 Robot competition 2nd place with that chassis. Recommended to all project makers.