Double Aluminum Rollers 15398: What 13–12 mm Means
Understand the stepped 13 and 12 mm roller contact, included bearings and mounting checks for Tamiya item 15398. Use the item-specific checklist.
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Browse available alternativesA roll of double-sided adhesive tape sized for Mini 4WD maintenance work. It is most commonly used to mount rubber tires onto wheels and to fix brake sponge (foam) strips to the underside of the chassis for track braking sections. The adhesive gives a secure bond while staying thin enough not to add noticeable bulk or throw off wheel balance.
Because ride height and chassis clearance in Mini 4WD racing are set in fractions of a millimetre, many racers build up several thin layers of this tape rather than relying on one fixed-thickness strip, fine-tuning a brake sponge's height and firmness by adding or peeling back layers between runs instead of swapping the sponge itself. The same adhesive seats tires onto wheels without the added weight, mess or cure time of glue, and stays workable enough that a tire can be lifted and re-centred if it goes on slightly off-round. Because it gets used up in small amounts across many minor jobs rather than one big one, most racers keep a roll permanently in their trackside toolbox alongside spare screws and washers.
Understand the stepped 13 and 12 mm roller contact, included bearings and mounting checks for Tamiya item 15398. Use the item-specific checklist.
Tamiya 15456 and 15516 bundle five gear ratios, 3.5:1 to 5:1, but fit different chassis. Compare contents, price and fit before buying the wrong set.
Choose a Tamiya Mini 4WD gear set by the exact chassis, motor layout and instructions. Check ratio, gear cover and event rules before changing the drivetrain.