Samix FCX24 +4mm Brass Hex Adapters are an optional accessory and a great way to add a bit of low hung un-sprung weight to your FCX24 for improved stability. Plus, the 4mm thickness increases track width up to 2mm.
Features: Brass hex adapters add 4g for 4pcs Better center or gravity and forward weight bias for climbing 4mm thickness Made of high quality CNC machined brass Direct fit standard FCX24 Black coating to help prevent corrosion