Out n About Nipper Sport v4 Stroller. The Nipper Sport is aimed at parents who wish to use their buggy in off-road conditions and / or parents who intend to use their buggy whilst jogging. The fixed front wheel ensures maximum stability over rough terrain, whilst the large 16″ wheels guarantee a smoother ride for the child and an easier push for the parents. Other than the large 16″ wheels, fixed front wheel, and a handlebar-mounted brake lever to control speed, the Nipper Sport boasts the same great features as the Nipper 360 Single model. It also comes complete with a fantastic 2 year warranty! The V4 range now comes with an auto lock which will clip together once the buggy has been folded.