The best partner for high-performance fat bikes, magnesium alloy lower leg + forged aluminum crown; stanchion 38mm, high-strength and lightweight aviation-grade aluminum stanchion; newly upgraded air suspension system, bearing-type sliding sleeve, greatly improving the smoothness of the stanchion; Optional coil spring suspension fork (using high carbon steel stanchion), optional full-featured, easy to maintain, and easy to handle various complex road conditions.