Upgrade Parts

JR 13mm Roller Ball Bearing

Make sure that your rollers are running at top efficiency by fitting them with these ball bearings. Made from steel, they will provide smooth progress along the track, in conjunction to superior reliability. Set Contents 13mm Ball Bearings x2 2x8mm...

JR Mini 4WD Basic Tune Up Set

This Basic Tune-Up Set is intended for novice Mini 4WD users and conveniently includes parts for fundamental modifications which are recommended by our Mini 4WD designers.

JR FRP Rear Brake Stay Set

The FRP plate in this set is an optimum size to allow attachment of the included brake sponge, while minimizing the chance of contact with parts like double rollers. Brakes are a vital racing item that stabilize your car before it jumps, which can make...

HG Carbon Rein. Plate 1.5mm

This is a carbon fiber reinforcing plate. It is used in the front and back section of a Mini 4WD race car chassis. Rollers are installed on the front and rear of a typical Mini 4WD race car. As a car maneuvers through a race track, the plastic chassis...

JR PRO Low Friction Roller Set

JR PRO Low Friction Roller Set

JR High Speed EX Counter Gear Gear Ratio 3.7:1

This gear set provides Mini 4WD racers with another setting option. It will give your machine a gear ratio of 3.7:1, which is faster than High-Speed Gear Set (Gear Ratio 4:1) and slower than Super Speed Gear Set (Gear Ratio 3.5:1).

Hyper Dash Motor PRO

Made for the advanced Mini 4WD racer, this high-performance Mini 4WD PRO motor really shines on winding, twisting circuits and features silver carbon motor brush for maximum electricity conduction. Must be given regular maintenance to ensure optimal...

JR Mini 4WD PRO G-22 Gear

These are spare part gears for Mini 4WD machines. They are a handy purchase for those who find that tuning up their Mini 4WD PRO car takes its toll on their gears. - Pink G-22 Gear x10 - Compatible with Mini 4WD PRO machines.

JR AR Chassis Basic Tune Set

This basic Tune-Up parts set includes fundamental Mini 4WD tuning options that you can use for your AR Chassis. The set includes mass dampers, front and rear FRP roller plates, stabilizer heads and 13mm rollers.

JR Plastic Roller Set, 13mm, Long Low Friction

JR Plastic Roller Set, 13mm, Long Low Friction

Side Mass Damper Set MA Chassis

Side dampers perform a key role in limiting "bounce" after your car has landed on a Mini 4WD racing circuit. This set features newly-designed FRP plates to attach to the side of the MA chassis, plus it includes block weights to fine tune the mass damper...

JR FRP Reinforcing Plate Set, Short

By installing these plates at the sections between the center and front/rear units of a MS chassis, the overall chassis rigidity will further improve and help maintain roller attachment angles.These plates can also be attached to side stays of Super X...

JR Brake Sponge Set 1/2/3mm Blue

This is a low-friction brake sponge set for Mini 4WD race cars. It comes with 3 thicknesses. It gives a milder brake effect than the Red sponge set sold in item 15492 JR Brake Sponge Set. Use the 3 thicknesses for different places on your Mini 4WD car!...

JR Aluminum Motor Support

More positive motor alignment. Assures the maximum motor power during jumps and wall contact. Radiates motor heat for cooler running.

JR Front Under Guard

Mini 4WD users often equip their vehicles with front aluminum FRP plates for a wide roller setting. This enhancement often leads to user"s vehicles getting stuck on the course fence. Tamiya designed this underguard to block the gap and improve your...