HOUSON bicycle brake disc, bicycle disc brake rotor 160mm 180mm MTB discs floating brake for road bike mountain bike MTB BMX city bike 180mm. 【Package】 bicycle disc. 【Material】The bicycle brake disc is made of high-quality stainless steel, which is hard, robust and not easy to break.. 【Effect】6-hole discs ensure consistent braking performance in all conditions.. 【Easy to use】The stainless steel brake disc is easy to use