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. REAR AXLE BLOCK - BLUE TM EN 125 15-22 EN 144 15-22 EN 250 15-22 EN 300 15-22 MX 125 15-22 MX 250 15-22 MX 300 15-22 MX 450 15-22