XRAY 309823 T4F21 Front Weight and Foam Upgrade  [XR-309823]

XRAY 309823 - T4F21 Balancing Bumper Weight Front 170g & Foam Bumper
Price:
NZD$117.12
Brand:
XRAY
Model:
XR-309823
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Improve T4F21 Front-End Grip with the XRAY 309823 Weight

If you race your XRAY T4F21 on sealed surfaces with variable grip, the XRAY 309823 bumper weight and foam kit is a useful tuning option. The 170g front weight replaces the lighter 30g kit piece to move balance forward and increase front-end grip during turn-in.

Benefits for T4F21 Handling

Specifically made for the T4F21 chassis, the XRAY 309823 adds front preload that helps the front tyres bite earlier and keeps the car more composed mid-corner. That extra mass at the front can reduce snap oversteer and tidy up lap-to-lap consistency.

Compatibility and Quick Fit

The XRAY 309823 is built to match the XRAY T4F21 mounting points, so it installs in place of the standard 30g bumper weight. The included foam bumper preserves contact protection while letting you test handling changes fast.
Remark :
Due to limited stock availability, please notice that some XRAY 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 run this with my current shock setup?

Yes, the 170g weight works with common spring and damper setups, but you may need to soften front roll or adjust droop to rebalance the chassis after adding mass.

Does the foam affect handling?

The foam bumper mainly provides protection and minimal aerodynamic change; the handling effect comes from the 170g weight, while the foam keeps front impacts cushioned.

Is the 170g weight reversible?

You can remove the 170g unit and re-fit the original 30g part if needed, making it straightforward to compare setups between meetings.

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