Koolah 29? is the rear child bicycle seat ideal for 29ers and small frames. Up to 22kg Kids, this bicycle seat is suitable to be installed in the rear, on the frame of the bicycle. The seat fits in tubes ranging from 28 to 40 mm. Koolah is one of Polisport?s most popular child bicycle seats, offering comfort and safety at a good value. Koolah features a four-position adjustable footrest with large feet protection and retention, three-point safety harnesses, lateral protection and three optional positioning. With this model, you can fit the seat in bicycles with and without a carrier.