The Cervélo S5 is more of a racing tool than a bike. It's phenomenally fast, but favours flatter terrain and short, punchy climbs. It's a little heavy, extremely stiff, and despite what the geometry ...

The best lightweight bikes can now give you a great mix of low weight and aerodynamic performance, as shown by our reviews. Gone are the days when you had to sacrifice efficiency and on-the-flat speed ...