XRAY 309823 T4F21 Front Bumper Weight Kit  [XR-309823]

XRAY 309823 - T4F21 Balancing Bumper Weight Front 170g & Foam Bumper
Price:
AUD$102.93
Brand:
XRAY
Model:
XR-309823
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Front-End Balance Upgrade for T4F21 Using XRAY 309823

For racers wanting a simple way to change front bias on their XRAY T4F21, the XRAY 309823 170g bumper weight and foam set is a straightforward upgrade. It replaces the standard 30g weight to add significant front ballast for better turn-in and mid-corner stability.

Performance Impact on T4F21

Designed to suit the T4F21 layout, the 170g bumper weight increases front tyre load where asphalt grip is moderate to low. The result is improved steering response and a steadier front end under braking and corner entry.

Quick Fitment for Immediate Results

The XRAY 309823 fits the XRAY T4F21 without modification, letting you swap in the heavier weight and foam bumper quickly between sessions. The change provides an immediate handling shift so you can dial in the rest of your setup.
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.

Is this compatible with my T4F21 body mounts?

Yes, the kit is made for the T4F21 mounting pattern and should align with standard body mounts used on that chassis without extra drilling.

Will the extra weight increase wear on components?

Adding 170g at the front slightly increases load on steering and suspension parts, so check hardware torque and inspect for wear more often if you run the heavier weight regularly.

How should I evaluate setup changes after fitting?

Test one variable at a time: fit the 170g weight, then try one tyre or damper change per run to isolate the effect and find the best combination for your track.

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