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 1.5mm carbon fiber reinforcing plate designed to mount 13mm and 19mm diameter rollers while keeping the finished car within official Mini 4WD width regulations, useful for cars that need larger rollers than their stock stays allow. The plate is printed in white with the Tamiya logo and roller size markings; cleaners should be avoided as they can damage this printed surface. Its chassis compatibility list is unusually broad, running from the original Type 3, Type 4, Type 5 and Zero Chassis through FM, FM-A, Super-1, Super-II, Super FM, Super TZ, Super X, Super XX, Super TZ-X, VS, MS, AR, MA, VZ and ME Chassis — covering essentially every Mini 4WD and Mini 4WD PRO chassis Tamiya has released. That makes it the widest-fitment plate in the HG Carbon Reinforcing Plate family, ahead of the current-chassis-only HG Carbon Reinforcing Plate Set (item 15495).
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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Read the six-piece carbon-reinforced 8T pinion pack correctly and check shaft fit and gear wear before replacing a pinion. Check live stock.