Motors built for skateboards, not adapted to them

When the Mach One was sketched in 2020, the standard industry practice was adapting RC-hobby outrunners — motors designed for planes and cars — to skateboard duty. They spin happily, but skateboard loads are different: constant shock loads through drivetrain, extreme vibration, heat soak on long climbs, and an operating in dust, rocks, and water.

Our 6485 platform was engineered around those realities: the shaft, bearings, mounting interface and cooling system are all skateboard decisions, not hobby-industry hand-me-downs. It's engineering other builders noticed — Radium motors have since turned up on some of the most respected boards in the industry.

The Mach One runs twin 205kv Radium 6485 motors through a dual Vesc-based ESC and a belt drive. Belt drive is a deliberate choice, not a cost one: belts isolate motor and road shock from each other, gear the motor into its efficient range, and make ratio changes a 15 minute tuning job — 16/45T stock, with our published belt calculator covering the alternatives. Every wear part in the drivetrain is a genuine Radium spare.

The Mach One S launched the F55 Darkstar — externally the same 6485 footprint, internally a redesign. A 10% larger stator core, custom bevel-shaped magnets, a new shaft-mounting system, a unique bearing arrangement, a c-clip pulley mounting system and improved cooling. The result is more torque higher efficiency, and now 9000W capable per motor — running on the S's 18S high-voltage system at 6,000W and a 70kph top speed.

Motors are covered by our 12-month warranty from the date of delivery, and beyond that they're built to be serviced rather than binned: replacement motors are stocked as standard parts, our published motor replacement guide walks you through the job, and the belt-drive layout means a motor swap doesn't disturb the rest of the drivetrain.