B-One - safe and comfortable rear child bike seat
B-one has a high quality rear bike seat suitable for children weighing up to 22 kg. It is available standard and relax versions, offering outstanding comfort and safety when driving.
Key features:
✔ Adjustable backrest - height-adjustable.
✔ Five-point seat belt - adjustable in length, height and depth, providing stability and protection.
✔ Adjustable footrests - continuously adjustable to the child's height.
✔ Comfort and ergonomics - the seat is designed to provide maximum comfort and stability for the child.
Strengthening opportunities:
🔹 B-One Standard - attachment to the bicycle frame.
- ✅ Wheel diameter: 26” / 28”
- ✅ Seat tube diameter: 28-45 mm (1.10” - 1.77”)
- ✅ Seat tube height: 28-80 mm (1.10” - 2.36”)
🔹 B-One Clamp - rack mount (compatible with ISO 11243 standards, rack width 120-175 mm, up to 190 mm for E-bikes).
- ✅ Wheel diameter: 26” / 28”
- ✅ Trunk width: 120-175 mm
- ✅ Compatible with E-bikes up to 185 mm
Further information PDF:
B-One Standard
B-One Relax
B-One Clamp
Bellelli B-One is the perfect choice for parents who want to provide their child with a safe, comfortable and ergonomic driving experience!

















