19mm Performance Ringless Aluminium Ball Race Roller M4WD-40/PK by 3Racing  [M4WD-40/PK]

Tamiya Mini 4WD 19mm Aluminum Ball -Race Rollers ( Ringless-Light weight ) -Pink - 3RACING M4WD-40/PK
Price:
USD$6.30
Brand:
3Racing
Model:
M4WD-40/PK
Condition:
Brand New
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19mm performance ringless aluminium roller in pink

The M4WD-40/PK is a purpose-machined 19mm ringless aluminium ball race roller engineered for weight reduction and compact edge profile. Its ringless geometry removes the peripheral flange to reduce rotational inertia while maintaining a minimal outer diameter to suit tight clearance builds.

Intended for experienced racers and tuners, this roller requires matching bearing inner diameter and correct axle hardware for optimal seating. The anodised surface offers standard wear resistance; however, frequent abrasive contact with rough guide rails will abrade the finish and may influence long term run behaviour.

Service notes: verify bearing press-fit and inspect shaft runout when replacing rollers. Use this component where reduced peripheral mass and consistent cosmetic presentation are required in a competitive parts stack.

What bearing ID is required for correct fitment?

Match the bearing inner diameter to your axle size precisely; an incorrect ID will lead to poor seating and potential wobble under load.

How does reduced peripheral mass affect lap performance?

Lower peripheral mass reduces rotational inertia, which can improve acceleration and responsiveness, though handling changes depend on suspension and guide geometry.

Is the anodised finish suitable for race use?

Anodising provides a consistent surface for identification and light protection, but expect gradual wear with repeated rail contact; inspect finish as part of routine checks.

Recommended checks after installation?

Confirm bearing seating, verify shaft runout, and ensure no lateral interference during chassis flex; small misalignments are amplified at race speeds.