As one of the few manufacturers who does so, NG Brakes provides a KBA (Federal Motor Transport Authority - Germany) certificate with all brake discs, so they may be used on public roads. KBA (Federal Motor Transport Authority - Germany) certificate is supplied with each disc. The OEM version is completely equivalent to the original brake disc dimensions. However, the design may vary on some models. Street legal: Yes. Outer diameter: 259mm. Internal diameter. Mounting: 108mm. Thickness: 3.5mm. Bolt holes: 6. Bolt hole diameter: 6.5mm. Type: Standard vehicle fitment for brake disc NG1531 m AGUTI XSM 50 SUPERMOTARD of 2007-2010 (front) YAMAHA DT 50 LC 2008 (front) DT 50 SM 2007-2011 (front) DT 50 X / DT SM 2007-2011 (front) XT 125 X 2007-2011 (front)