The Polisport Koolah 29\" has a special bar so you´re able to push the seat up. This is ideal when you´re using a 29er or a bike with a small frame. SAFETY Armrest shape for comfort safeguarding the child hands and increased lateral protection. Grow with your child - adjustable 3-point safety harness with a childproof safety buckle. ,1 rear reflective sticker. ,Extra security frame belt. ,Increased feet protection preventing any contact with the wheel. .COMFORT Grow with your child – 2 option in height for placing the safety harness and adjustable footrests in 4 positions. Ability to move the seat backward and forward in 3 positions, according to child and bicycle size. ,The frame holder allows to install/release the baby seat from the bike in seconds by pushing the button. This also means that its also really easy to commute or store the seat. All tools and mounting kit required for assembling the seat are included. .Key Features: EN14344Fits bicycles with or without carriers. ,Fits round and oval tubes from Ø28 to 40 mm ,Frame holder space required for assembling - 80 mm ,Child weight 9 to 22 kg / 19,84 to 48,5 lb.