F6 X1 Spool Set, with 1/4" Carbon Axle and Right Hub Crawler Sold separately are additional 8gr

Sold separately are additional 8gr weights #1808 so that you can easily add extra grams if needed

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F6 X1 Spool Set, with 1/4" Carbon Axle and Right Hub Crawler Sold separately are additional 8grExtra lightweight carbon fiber and 7075 alloy clamping spool set for F1 cars with a 1 4 rear axle design such as for the X1, F6 and Roche. An F1 spool helps eliminate 'diffing out' of the rear pod on extra high grip black carpet conditions and gives your F1 more corner exit speeds. This spool also greatly reduces the weight compared to a gear diff or standard ball diff for a cooler running motor and increased acceleration. This sturdy design