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XRay Composite Upright Rear - Hard

XRay Composite Upright Rear - Hard

Brand: XRay

Part No: XR363353-H

£7.59 RRP £7.99

Shadow Stock: Usually ships next day

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The XRay Composite Upright Rear - Hard (XR363353-H) is a compact, high-strength rear hub designed to balance reliability and performance. Its hard moulded composite construction is suited to medium- and high-traction tracks, offering precise handling and durable operation for demanding conditions.

Key Features

  • Hard moulded composite material for durability and performance
  • Two roll centre positions: lower has 1 fixed position; upper offers 3 positions
  • 0° toe for stability and to help prevent suspension geometry changes in hard impacts
  • Optimised bearing setup: 5x12mm outer bearing for increased dynamic load, 5x10mm inner bearing to reduce unsprung weight
  • Compact design with superior strength
  • Suitable for use on either left or right side

Track-Focused Tuning

Adjustable roll centre options allow you to fine-tune rear grip and cornering response to suit surface conditions. The mixed bearing sizes enhance drivetrain reliability while keeping rotating mass low. A practical, robust upgrade from XRay for consistent performance.

HARD molded composite rear upright with 2 roll center positions made from super-tough, high-tech composite material. Compact size and superior strength give the perfect balance between reliability and performance.

This HARD rear upright is suitable for most track conditions, especially medium- and high-traction tracks.


The lower roll center adjustment has 1 fixed position on the upright, while the upper roll center adjustment has 3 different positions. The rear uprights feature 0 toe to ensure stability and prevent suspension geometry changes in hard crashes.

For maximum drivetrain reliability, larger 5x12mm ball-bearings are used in the outer position for increased dynamic load. On the inner position, smaller 5x10mm ball-bearings are used to minimize unsprung weight.

For use on either left or right sides.


Key Info:
  • Brand: XRay
  • Part No: XR363353-H
Standard Shipping

£3.95 to most of the UK

Express Shipping

£6.95 to most of the UK

Worldwide Shipping

Available at checkout

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