The BMC Twostroke AL Four is built for exceptional cross-country performance with its lightweight aluminum frame. Inspired by fighter jets and incorporating elements from BMC’s Fourstroke MTB, it balances form, function, and performance for tackling any terrain. Its aggressive geometry is designed for steep and loose surfaces, ensuring optimal weight distribution. The redesigned, wider chainstays accommodate large, modern XC tires and include molded covers for enhanced durability.