Dagu Wild Thumper 6WD All-Terrain Chassis Turning

We bought a Dagu Wild Thumper 6WD All-Terrain Chassis, Black, 34:1. We removed the middle two wheels to make the 6-wheel drive into a 4-wheel drive in order to install 2 brushes in the middle. We also changed the bigger wheels, but after doing this, our robot can’t turn well, even if the one side speed is set to 3200 (no limit speed of SMC G218v15motor controller), is there any solution to make him turn more Is it better?

Hello.

Can you post some pictures showing the modifications you made to your Wild Thumper?

- Patrick