XRAY X4F'25 Upper Deck Rear Hard Graphite 2.5 by Factory Pro O-XCP023H  [FP-O-XCP023H]

Rear upper deck for XRAY X4F'25

This is an RC-scale rear upper deck designed for the XRAY X4F'25 chassis, supplied by Factory Pro under model O-XCP023H. The part is the hard (stiffer) rear upper deck finished in graphite 2.5, intended for hobby use where reducing chassis flex and refining handling balance are the goals.

Functionally, the rear upper deck alters torsional stiffness across the rear section of the chassis. In practice this affects turn-in and mid-corner behaviour; installers commonly choose a stiffer rear deck to reduce unwanted flex under acceleration or during high-load cornering. The part is a direct upgrade option for X4F'25 users seeking a firmer rear response without changing other major components.

Installation notes: the deck uses the X4F'25 mounting locations and is fitted with the existing screw points on the chassis, so no chassis modification is required. Inspect existing hex screws and threads for wear before reuse, and tighten to a consistent torque using a suitable hex driver to avoid uneven preload. After installation, re-check clearance around the motor and wave of the suspension to ensure no interference with the motor, gearbox, or suspension travel.

Tuning advice: when switching to the hard graphite 2.5 deck, consider incremental changes to rear suspension settings and anti-roll balance rather than a single large change. Monitor tyre wear and temperature over a few test runs to determine whether damping, toe, or roll center adjustments are needed to restore neutral handling.