XRay X426 Carbon Upper Deck - Split Front XR301090

The XRay X426 Carbon Upper Deck - Split Front - Open - 2.0mm, part number XR301090, is an upper deck for adjusting chassis flex and handling. Its split-front, open design is made for use on lower- to medium-traction tracks, where the upper deck can alter the car’s steering response and stability. The manufacturer describes the part as machined from 1.5mm glass fibre material, while the product name identifies the 2.0mm version. It connects to the motor mount with either one or two rear screws, allowing the flex setting to be changed according to driving preference and track conditions.

Setup Options

Using one rear screw creates a softer setting with more flex and steering, although the car has less stability under power. Fitting both screws creates a stiffer setting with reduced front and rear flex. This reduces mid-corner steering and rotation while increasing stability and making the car easier to drive.

• Soft setting: one rear screw for more flex and steering
• Stiff setting: two rear screws for reduced flex and increased stability