1、MULTIPURPOSE ADAPTATION: For 50cc 110cc 125cc 150cc 200cc 250cc Dirt Bike Quad ATV Go Kart to meet different needs of users. 2、UNIQUE DESIGN: The disc brakes caliperss are applied to both front and rear wheels, which can realize more powerful braking effect and ensure safety during driving. 3、DIY MODIFICATION: This kit is suitable for DIY modification, which can help you upgrade your vehicle to twin disc brake system, improve braking performance. 4、METAL STRUCTURE: Disc rotor kit made of metal to ensure durability and reliability, and able to withstand high loads of use on vehicles, no need to worry about damage during use. 5、UPGRADED PERFORMANCE: High performance and flexibility bring you strong reliability and ensure excellent using and driving experience.