Apico rear axle blocks are manufactured using a high-grade 6061-T6 Aluminium. CNC machined for a perfect fit every time and unrivalled precision when aligning the rear wheel. They all come with an anodised finish with anti-corrosion properties and Laser etched alignment marks to assist you when adjusting your chain. TRS ONE/ONE GOLD/R/RR - YELLOW 125-300 16-24