This is a lightweight 17mm aluminum ball-race rollers that are currently available to tune your Mini 4WD car. These rollers provide less weight and a slight boost in speed, as well as superior durability and silky-smooth rotation.
• 17mm Lightweight Aluminum Ball-Race Rollers x2
• Eight holes in each roller make for an individual weight of 0.81 grams, a saving of roughly 0.25 grams per roller.
• Small parts for attachment are included.
• Built-in 520 ball bearings provide smooth roll.
• Compatible with Mini 4WD and Mini 4WD PRO cars. Some bodies may require modification