MR-03
Indoor RCP track racing
Kyosho's flagship rear-wheel-drive racing platform. The most popular Mini-Z for indoor track competition.
The MR-03 is where serious Mini-Z racing happens. Its rear-wheel-drive layout rewards precision driving, and the tuning depth — from T-plate stiffness to motor choice to gyro sensitivity — gives experienced drivers a lot to work with.
Guides for the MR-03 10 guides
Mini-Z Tire Compound Tuning by Surface (RCP, Carpet, Concrete)
A practical tire compound system for Mini-Z racers. Baselines for RCP, carpet, and hard surfaces with symptom-based adjustments that actually work.
Best Tires by Surface and Driving Style
Compound, width, and offset selection for RCP, carpet, and hardwood. Stop guessing and start gripping.
Mini-Z Gyro Installation and Setup Guide
A gyro transforms RWD Mini-Z handling. Here's how to install it correctly, set the direction, and tune the gain for your track.
Mini-Z Brushless Conversion: Motors, ESCs, and LiPo
Everything you need to go brushless on the MR-03 or MA-020. Motor sizing, ESC compatibility, LiPo integration, and what to expect on the other side.
Mini-Z T-Plate Setup: How Stiffness Shapes Handling
The T-plate is the primary tuning lever on RWD Mini-Z platforms. Here's how to read what your car is doing and choose the right flex rating for your surface.
Mini-Z Battery Guide: NiMH, LiPo, and What to Run
Consistent voltage means consistent lap times. The full breakdown on NiMH vs LiPo for Mini-Z, which cells to buy, and how to charge them correctly.
Your First 5 Mini-Z Upgrades (And What Order to Do Them)
Every Mini-Z owner ends up at the same place: the stock car is fun, but you know it can be better. The question is always where to start. We rank the first five mods by impact-per-dollar, starting with the one upgrade every single Mini-Z should have.
Mini-Z Transmitter Upgrade Guide
The stock transmitter is your biggest limitation that isn't on the car. Here's what to upgrade to and which features actually matter for Mini-Z.
MR-03 Platform Upgrade Guide
The MR-03 is Kyosho's flagship 1/28 rear-wheel-drive platform. Here's how to build one that actually performs.
Mini-Z Body Compatibility Guide
Wheelbase, offset, and width explained. Know before you buy so the body you want actually fits your chassis.