Upgrade Parts

2mm Cap Screw Set

These durable screws are used to replace standard stainless steel screws that are used to secure parts such as mass dampers and guide rollers to offer greater rigidity to these sections of your Mini 4WD racer.

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 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).

JR Setting Gear Set FM-A Chassis

Tune your FM-A chassis by altering the gear ratio. These gears are an easy way to increase the speed of your machine. This set includes gears to achieve five different ratios (3.5:1, 3.7:1, 4:1, 4.2:1 and 5:1)! 1.4mm Hollow Lightweight Propeller...

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.

Brake Sponge Set 1/2/3mm White

Brake-sponges help stop your Mini 4WD car from leaving the track. This set includes three thicknesses of the same type of brake sponge, allowing easy adjustment of your brake settings. 2mm sponge comes in a single sheet to help differentiate thicknesses...

JR 3-Spoke Ball-Race Rollers (17mm/Aluminum)

Lightweight aluminum roller with three spokes. Rubber rings are included for shock absorption.

JR Basic Tune-Up Parts FM-A Chassis

This handy option set works in conjunction with the FM-A chassis kit, the Rowdy Bull (Item 18707) and other kits based on the FM-A chassis. Tuning up your Mini 4WD car can be a daunting prospect if you don't know where to start. Therefore, this his set...

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 Aluminum Motor Support

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