Rowdy brings the DNA of Mudrockers to children's bicycles, ready for any trail adventure. The two-part front fender can be attached flexibly to the fork. At the rear wheel, the Rowdy is mounted with a newly developed, angle-adjustable mounting system. The Multi-Adjust system grows with the child and allows for adjustment to different frame sizes. For safety, the USB rear light Rowdy rear light can be optionally integrated into the fender.