This floating brake discs is designed with two kinds of material through rivet connection.This connection is a certain amount of freedom,which reduces heat transfer and solve the problem of internal stress.<br/>Features:<br />1 Floating Brake Disc Rotor with 6 Bolts.<br />Made of stainless steel and aluminum alloy,super strong and durable.<br />Floating system with rivet connection,good abrasion performance,quick ventilation, and good heat dispersion.<br />Hollow frame for excellent heat dissipation and drainage.<br />Suitable for most mountain and road bikes with standard six-bolt hubs.<br />Easy to install on your bikes.<br/>Specification:<br />Rotor diameter: 160mm / 180mm / 203mm (optional)<br />Color: Black / Red (optional)<br />Center Distance: 44 mm<br />Thickness: 1.9 mm<br />Material: Stainless steel &#43; Aluminum alloy<br />Rotor weight: approx. 106g / 135g / 172g<br/>Package List:<br />1* Floating Brake Disc Rotor<br />6* Screw