Cycling shop Decathlon. Cycling is the perfect way to keep fit, discovering the countryside or riding to work to beat the traffic. Here at Decathlon we stock a great range of b'Twin Bikes for all these purposes with market leading Guarantees on all frames and parts. We have critically acclaimed b'Twin Road Bikes. Mountain Bikes if you want to hit the country tracks or tackle the next downhill. We also have a great range of Commuting, Hybrid & Folding bikes. If you want to take the kids along, then look no further than our Kids range in all sizes. We also have a great range of Cycling Clothes, Helmets, Parts and Accessories.