Specifically made for the X4 lineup, the XRAY 301570 aluminum upper clamps give a firmer foundation for caster inserts, improving repeatability on track. They mount neatly to the lower bulkheads and the centering lugs maintain exact caster position for consistent turn-in.
These clamps are produced from Swiss 7075 T6 aluminum to combine high strength with reduced weight. The design incorporates 1mm milled grooves to suit ball-bearing hubs, trimming bulk while keeping rigidity. A black anodised coat protects the parts and looks tidy.
The XRAY 301570 uses screws from the underside of the caster inserts to secure the clamp and stop it loosening during routine work. Those same screws double as pivot ball mounts for the upper arms, lowering parts count and simplifying rebuilds.
If you want tighter steering feedback and less fuss when servicing, the XRAY 301570 upper clamps are a sensible, performance-minded upgrade.
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