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

Rear upper deck upgrade for XRAY X4F'25

This rear upper deck is produced for the XRAY X4F'25 chassis and supplied by Factory Pro as model O-XCP023H. The hard graphite 2.5 construction is intended to reduce chassis flex and to help refine the balance of handling for competitive hobby use.

In service, the stiffer rear deck increases torsional rigidity in the rear section of the chassis. That change typically tightens turn-in and improves mid-corner stability under load; racers often fit a harder deck to cut unwanted movement under acceleration or during heavy cornering without swapping major components.

Fitment notes: the deck locates to the X4F'25 mounting points and uses the existing screw locations on the chassis, so no permanent chassis mods are required. Check hex screws and threaded holes for wear before reuse and tighten evenly with a suitable hex driver to avoid uneven preload. After fitting, verify motor clearance and suspension travel to confirm there is no contact with the motor, gearbox, or nearby parts.

Tuning tips: when you move to the hard graphite 2.5 deck, make gradual changes to rear shock settings and anti-roll balance instead of a single large change. Monitor tyre wear and temperatures over a few runs to decide whether damping, toe, or roll centre tweaks are needed to regain neutral handling.