Technobots do a standard fuse up to 40A this should be enough, and a 4 fuse holder one for each motor if you wanted.
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Technobots do a standard fuse up to 40A this should be enough, and a 4 fuse holder one for each motor if you wanted.
Generally with drive motors you shouldn't ever reach a stall condition, the wheels should spin before this happens. The reason fuses are often put in line with the motors (between the motor and speed controller, on either of the two leads) is to protect against this exceptional stall condition, which might occur if a wheel gets jammed due to damage for instance. This differs to the main power fuse some robots have after the battery which is often to protect against electrical faults (e.g. shorts).
Specifically to the GR01 I wouldn't expect normal running as drive in a featherweight (with wheels up to 125mm) to exceed 20A average with ~30A peaks (of course there are more variables). A current-protected controller around the 20-30A range would be ideal (Scorpion XXL or Sabertooth 25) or a non-current protected controller with in-line fuses (e.g. Electronize 30A).