Decathlon – The Grafton Centre, Cambridge – Opening Hours & Store Details Decathlon is situated within easy reach in The Grafton Centre on East Road, about a 0.44 mile distance east of the centre of Cambridge, in Petersfield (by Parker’s Piece and Midsummer Common). This store is located fittingly to serve those from the areas of Cambridge City Centre, Trumpington, Abbey, Chesterton, Market, Petersfield, Romsey and Barnwell. Today (Friday), its hours of opening are from 9:00 am – 8:00 pm. On this page you will find all the information about Decathlon The Grafton Centre, Cambridge, including the open hours, address, direct contact number and additional essential details.