I used this for attaching Offroad wheel to 5mm shaft motor. I had to drill little for making center hole to 5mm.

This motors are little beefy. We cut it's outer shaft from 3mm. And it fit for minisumo, easy operation. I recommend. Also it acceptes high voltages very well.

This wheels are fantastic! With only changing the wheels my robot's speed and manueverability increased %20!.

This gear combination gives very high torque with DCX and RE35 model motors. We recommend to robot sumo competitors. Thanks Jsumo.

We were using old bulky Maxon RE40s. Now we migrated our projects to RE35 motor for due to low weight. This extra weight helps us for adding new mechanism and strengthening the robot body.

We are just starting the Sumo robot projects. Very easy to install and very fast sumo robot design. We thank the Jsumo team for their help.

Why I have to pay 45bucks for shipping ebook? This is crazy!!!:(((( Admin Edit: You don't need to make any payment. Please use the code at description :)

I was thinking about how can I start to design good sumo robot for Japan. Now I know. And thanks to JSumo team as a giving me good tips with email.

hi! :) Hi, how long does it take to get to Mexico? The 9 cm is already armed or just the chassis? do you speak Spanish? Admin Reply: Just chassis. DHL express takes 3-4 days arrival time to Mexico. We ship daily.

how can I buy this ebook without pay the shipment? Admin reply: Please read the description for not paying shipment :) Thanks.