Tamiya HG Lightweight 19mm All-Aluminum Ball-Race Rollers (Taper Type)(95651)

A lightened version of Tamiya's 19mm tapered aluminum ball-race roller (the standard version is Item 95436). The tapered profile helps the car slide back onto the track rather than snagging when it rides up a course fence, and each roller carries a 520 bearing for smooth rotation. Material has been drilled out to cut roughly 30% off the weight of each roller compared with the non-lightened version.

Tamiya lists it as fitting essentially the whole Mini 4WD chassis lineage — from the original Type 1 through Type 5, Zero, FM, Super-1, Super-2, Super-FM, Super-TZ, Super-X, Super-XX, Super-TZ-X, VS, AR, FM-A, MS and MA — since the roller-unit mounting screw spacing has stayed standardised across nearly every chassis Tamiya has released. Shaving weight out of a roller matters more than shaving it from most other parts, because rollers are unsprung rotating mass at the edge of the chassis: lighter rollers spin up faster and add less resistance each time the car clips a fence or corners hard.

• Contents: 2x 19mm tapered, lightened aluminum ball-race rollers, 2x 2x8mm screws, 4x aluminum spacers
• Compatible with Mini 4WD PRO and standard Mini 4WD chassis (some bodies require trimming)