Kettler Bike Push Bar (2 Piece) The Kettler 2-piece bike push bar is the best way to give your child the confidence and control to master bicycle riding Our push bar is the safest, easiest bike training concept on the market. Its durable adjustable design, easy one-bolt assembly, and universal clamp fits most children's bicycles and balance bikes Durable chrome plated steel construction with non-slip foam grip Included shim allows use with all Kettler 12" & 16" bikes as well as all 10" & 12" balance bikes