Mini 4WD Rollers Guide
A complete Mini 4WD roller guide: 8mm to 19mm sizes, plastic against aluminium and rubber-ringed options, and how each behaves through a lane change.
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Browse available alternativesA pair of reinforcing plates cut from durable 1.5mm FRP, designed to let builders mount 13mm and 19mm rollers in a wider stance than the stock roller positions allow. Fitting hardware is included, though the rollers themselves are sold separately. Some chassis and bodies may need modification to fit.
Tamiya sells the same 13/19mm roller layout in two other reinforcing plate lines: item 15497, an HG Carbon Reinforcing Plate cut from carbon fibre for extra stiffness and lower weight than FRP, and item 15193, an earlier FRP Reinforcing Plate Set, so racers can choose between material and cost depending on how much they want to spend chasing stiffness. The hole spacing also matches Tamiya's 13mm ringless aluminum roller, item 15437, making this plate a natural pairing for racers upgrading from stock rollers to that ball-race option.
A complete Mini 4WD roller guide: 8mm to 19mm sizes, plastic against aluminium and rubber-ringed options, and how each behaves through a lane change.
Mini 4WD carbon stays and FRP plates solve different problems in B-MAX. Learn when to start with FRP, when carbon helps, and what to check first.