Aftermarket Mini 4WD Double 8-9mm Aluminum Rollers M4WD-33/RE (red) by 3Racing  [M4WD-33/RE]

8-9mm double aluminum rollers with red anodize

These compact double rollers are intended for experienced Mini 4WD enthusiasts working on 1/32-scale models. The paired rollers in the 8-9mm diameter range are anodized red to offer improved surface hardness and modest corrosion resistance while keeping weight low.

Compatibility depends on roller shaft diameter and mounting hole clearances present on various 4WD chassis. Inspect axle bore, spacer layout and any local chassis modifications prior to fitting. They are compatible with common roller shafts and most two-piece mount systems used on Super-II, MA, MS, AR and similar performance frames; verify fit on non-standard or scale conversions.

Fitting tips for experienced builders: ensure shaft alignment and lateral clearance, apply light lubrication to non-bearing contact points, and avoid overtightening hardware which can deform the roller or bracket. Check the anodize for chips after running and replace any roller with structural damage. These items are intended as replacement parts or for custom tuning rather than generic kit upgrades.

Service notes: clean and inspect rollers periodically to detect wear or play at the shaft interface. Replace or refresh small bearings or bushings to maintain desired tolerances and smooth rotation.