Kinderfahrrad Haltestange (Woom and Cube)

Simple holder for teaching children the bicycle. 

Currently Woom 1, 2 and 3 (and maybe larger ones of Woom) are supported, having a seat pipe diameter of 22 mm.

Additionally I just designed an adapter for Cube bicycles (seat pipe diameter 27 mm)

You will need a 28 mm diameter wood broom style -→ If you have a smaller broom style in diameter you can try printing some adapter ring (using TPU?)

2x M4x40 screws and nuts for seat attachement

Multiple wood screws

For V1 I used PETg-CF from Eryone but for the last prints I just used normal Bambu HF-PETg and it also does the job perfectly. If you want to be safe, use fiber reinforced filaments ;)

Update 30th march 2026: V2 of the seat bracket is now able to remove the broom style quick by using an M6 star handle instead of permanently fix it (I used this one: https://makerworld.com/de/models/1505895-star-knob-nut-screw?from=search#profileId-1575982). You will need an M6x50 hex bolt and nut. Additionally, all holes were reshaped/optimized so they don't need any support in the provided orientation (you have to pinch the holes after printing as they are sealed using 1 layer).