This auxiliary wheel is crafted from high-strength aluminum alloy with a CNC-cut body and anodized coloring, offering durability and a corrosion-resistant finish. It is equipped with a sturdy steel bearing for smooth rolling performance. The wheel features a thick silicone rubber outer layer measuring 61.7 x 6.5 x 12 mm, providing shock absorption and preventing scratches on indoor flooring. It is designed as a premium upgrade for Brompton-style folding bicycles. Each wheel comes with a matching M6 screw and washer for quick installation.
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