These lightweight yet tough 19mm aluminum rollers feature inbuilt 520 bearings to provide your machine with smooth movement. In addition, these rollers can be used for both front and rear roller setups.
This new 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).
This is the Alpha III Model Rocket Kit from Estes®. Suitable for Ages 10 & Older with Adult Supervision for Those Under 12.
Skill Level E2X - Easy to Assemble Rocket Kit
