The North Thirty G2 Forks is designed to fit 115mm x 30mm perfectly, allowing them to have the maximum amount of material to support the wheel and making it their strongest fork yet. Along with an awesome design, the Thirty fork utilizes 6061 T6 aluminum material, 6mm M8 bolts, an M8 axle system and even an integrated crown race, creating a fork that is reliable even after months of riding.