Front bike seat & screen Bo bike. Bobike Mini+ front mounted bicycle child seat. For children from 9 months of age to 15 kg weight (~3 years age). The child must be able to support the weight of their head unaided for the duration of the ride. Complies with BS EN 14344:2004. The seats are made in Holland included UNIVERSAL BRACKET FOR THE BOBIKE MINI. This pretty much supercedes the two earlier brackets, fitting steel Quill stems and 1?" (one and one eigth inch) steel cored headsets. In its 'Quill Stem' mode, the bracket needs 38mm of exposed stem. In 'headset mode', it requires 20mm of exposed core, which may require the removal of a spacer.