The Tamiya Mini 4WD 13mm Aluminum Ball Race Rollers in light blue are a value racing part aimed at improving chassis stability and predictable cornering. Their ringless form factor reduces lateral friction points and supports tighter racing lines.
These rollers are compatible with common Mini 4WD chassis types such as MS, MA, AR and VS. When installing, verify spacer and shaft clearance to ensure true rotation and minimal binding in competitive setups.
For competition, the rollers help lower lateral displacement and allow more aggressive corner entry. Use them in concert with suspension and weight distribution adjustments to refine handling for specific track profiles.