Tamiya 13mm Aluminum Ball-Race Rollers (Ringless)(15437)

These 13mm rollers are machined from aluminum without the plastic ring used on many other Tamiya rollers, trimming weight at the cost of running the bare aluminum rim directly against the course wall. Each roller turns on a 520 ball bearing rather than a plain bushing, keeping rotation smooth and cutting drag at speed. Tamiya lists them as compatible across nearly its whole chassis lineup, from the older Type 3, Type 4, Type 5, and Zero chassis through FM, Super-1, Super-II, the Super X/XX/TZ family, MS, AR, MA, VZ, and ME chassis, so the same roller carries over even if a racer switches chassis platforms. Released in November 2018, they sit in Tamiya's "ringless" aluminum roller line, aimed at racers prioritising minimum rotating weight over the extra wall-contact durability a plastic ring provides, and are commonly run at the front of a machine where wall contact is lighter than at the rear.

• Diameter: 13mm
• Construction: aluminum, ringless (no plastic wall-contact ring)
• Bearing: 520 ball bearing per roller
• Compatible across nearly all Tamiya Mini 4WD chassis, Type 3 through current MA/ME