SKS X-Blade dirtboards have 2 adjustment points which provide custom fit and protection. This is especially effective with rear suspension bicycles. The dual compound creates a combination which reduces vibration and gives flexibility to reduce problems with tire contacts and there are no sharp edges to cause injury in the event of a crash. The powerstrap can be pre-adjusted for simple assembly. · unbreakable, high performance dual compound plastic · optimized dirt protection from the dual adjustable front and extra long rear spoiler · two adjustment points for custom fitting to all frames (Custom Fit Design) · Integrated anti-theft device · simple quick release fastening through pre-adjusted powerstrap · diffrent profiles available for 26" and 28" tires. 205gms