Kyosho UM731 A7075T6 Hard Main Chassis for RB6.6  [KY-UM731]

Kyosho UM731 - Aluminum Hard Main Chassis(A7075T6/RB6.6
Price:
NZD$137.37
Brand:
Kyosho
Model:
KY-UM731
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Stiffer A7075T6 Chassis for Competitive RB6.6 Builds

The Kyosho UM731 hard main chassis upgrades the RB6.6 with A7075T6 aluminium for enhanced torsional rigidity and improved track feedback. The firmer platform helps maintain consistent suspension behaviour under demanding conditions.

Why A7075T6 Works Well on the Track

A7075T6 offers a strong strength-to-weight balance that keeps mass low while delivering higher resistance to deformation. That means fewer changes to chassis shape after hard runs and more predictable handling.

Precision Machining for RB6.6 Alignment

Manufactured to mate with RB6.6 component layouts, the chassis fits stock mount points to simplify assembly. The close tolerances help ensure reliable part alignment and faster setup times.

Specifications

  • Material: A7075T6 Aluminum
  • Compatibility: RB6.6 Series
  • Category: Spare Parts, Legendary Series

For racers who prioritise consistent handling and chassis longevity, the Kyosho UM731 Aluminum Hard Main Chassis is a solid component upgrade choice.
Remark :
Due to limited stock availability, please notice that some Kyosho items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

Can I use standard RB6.6 body mounts with this chassis?

Yes, the UM731 aligns with standard body and mount points, so most RB6.6 bodies and mounts will fit without modification.

Is an aluminium chassis heavier than stock plastic options?

A7075T6 is denser than plastic but the design keeps weight gain minimal while adding stiffness; many racers accept the small weight increase for better handling.

Are there recommended fasteners to use with this chassis?

Use appropriate aluminium-compatible screws and thread locker where needed; stainless or titanium hardware are common choices to avoid galvanic issues.

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