Mini 4WD performance 17mm ringless roller M4WD-31/RE by 3Racing  [M4WD-31/RE]

Tamiya Mini 4WD 17mm Aluminum Ball -Race Rollers ( Ringless )(Red) - 3RACING M4WD-31/RE
Price:
USD$6.30
Brand:
3Racing
Model:
M4WD-31/RE
Condition:
Brand New
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17mm ringless racing roller M4WD-31/RE technical overview

This 17mm ringless aluminium ball race roller is supplied as a spare for Mini 4WD applications. Intended for performance 4WD racing chassis, it functions as a direct spare to standard rollers while offering a ringless inner profile that reduces internal contact surfaces and alters bearing preload characteristics. Tuners should note how the ringless configuration affects spacer stack and axial clearance on tuned setups.

Compatibility notes: designed to work with common Mini 4WD roller mounts and axles used on racing chassis. This is not a complete upgrade assembly; verify shaft diameter and spacer dimensions before installation. Not recommended for Wild or Scale Mini 4WD variants; applicable chassis examples include MA, MS, AR, FM-A, VS and Super-II where clearance permits.

Finish and handling: the component is anodized red and machined from aluminium. During installation avoid excessive screw torque, inspect bearings for smooth spin and check for lateral play after initial runs. Routine cleaning and inspection for burrs or seating issues will preserve rolling performance and reduce wear on adjacent chassis points.

What shaft and spacer tolerances should I confirm before fitting?

Measure shaft diameter and the internal bore of the roller, then calculate spacer stack to maintain correct axial clearance. For ringless rollers, precise spacer thickness matters more to avoid side loading.

How does ringless construction affect bearing seating?

Ringless designs change which surfaces bear load internally, so ensure bearings seat squarely and check for even rotation under light axial preload to prevent uneven wear.

Which chassis types should be trialled first?

Begin testing on MA or FM-A style performance chassis where roller mounts are standard, then evaluate clearance and handling before using on other variants.

What post-fit checks are recommended?

Check for smooth spin, confirm no lateral wobble and run a short track test to ensure there is no metal-on-plastic contact during chassis flex. Recheck spacer stack after the first run.

Any lubrication guidance for anodised aluminium rollers?

Use light, model-appropriate lubricants on axle seats and bearing interfaces; avoid heavy greases that attract dust and degrade spin quality.