The Mini 4WD PRO (ミニ四駆PRO, Mini Yonku Puro) series is a Mini 4WD car line-up introduced in November 2005 by Tamiya.
The unique feature of this line-up is that all cars are powered by a double-shaft-motor-driven 4WD system that has a 50/50 weight ratio and direct power transfer to all four wheels.
Featured in the line-up are the new MS Chassis and MA Chassis, both of which use the double-shaft motors manufactured exclusively by SMC Motor.
Interestingly, some car models are from the earlier Racing Mini 4WD series.
The two-shot manga My First Big Bakusou Kyoudai Let's & Go! and the on-going manga Hyper Dash! Yonkuro features cars from this lineup.
Some early models in this line (indicated with "polycarbonate body") required that the user paint and cut the bodyshell on their own, increasing the difficulty of assembly compared to those that don't require it; this practice was initially later discontinued starting with Avante Mk.II, but was later brought back for some models such as the Toyota Gazoo Racing TS050 Hybrid.