Characterised by their drop handlebars (mostly) and 700c wheels, with narrow, fast rolling tyres, road bikes are designed for fast and efficient tarmac riding. The drop handlebars allow you to adopt an efficient aerodynamic riding position, while the narrow tyres reduce rolling resistance, both of which are essential for riding quickly and efficiently on the black stuff.
Compared to mountain bikes and most hybrids the range of gears on a road bike is narrower, but the gaps between the gears tend to be closer which makes it easier to achieve your optimum pedalling speed (cadence). We will look into road bike gearing in more detail later.
Ideal for racing, club rides and fitness training, road bikes are also great for commuting.
Catering for different types of cycling, road bikes have diversified into four distinctive types;
This will depend on the type of riding you intend to do as well as your cycling experience and fitness levels. There are no hard fast rules but the general principles are;
This will depend on your fitness levels as well as the terrain on your route and how fast you want to ride. The principle difference between a flat bar road bike and a hybrid sports bike is the gearing. Compared to flat bar road bikes hybrids have a much wider range of gears with larger jumps between them, a good selection of low gears for easy climbing, but lack the very high gear ratios for very fast cycling. This means that, on a flat bar road bike, you can ride faster, will find it easier to match your cadence to you speed but will have to work harder when climbing steep hills.
Aluminium alloy frames are lightweight and robust. As you go up the price points alloy frames tend to get lighter, they may also have compliance (flex) features built in to improve the ride quality. Carbon fibre composites are just as strong but weigh significantly less. The ride quality is much smoother on a carbon bike due to the natural vibration damping properties of the material. Carbon fibre also allows engineers to design in more sophisticated compliance features which offer a very smooth ride without compromising efficiency or handling.
Carbon composite forks offer precise steering control, as well as offering a more comfortable ride, by absorbing road vibrations before they reach your hands. Carbon forks are now found on many alloy bikes.
As you go up the price points the number of gear options increases and the speed, smoothness and reliability of the gear shifts improves. Other than that the two things to consider are the type of chainset and the range on the cassette;
Chainset – compact cranks, with 50 and 34 tooth chainrings, are ideal for new riders as they offer the perfect balance between speed and easy climbing. Chainsets with larger 52 and 54 tooth chain rings will enable you to ride faster but require high levels of fitness when climbing .
Cassettes – wide range 11-32 tooth cassettes make climbing easier but there are wider jumps between each cog. Narrow range 11-28 & 11-25 cassettes make it easier to match your cadence but will make you work harder on the climbs.
Wheels & tyres
As you move up the price points on road bikes the wheels will get lighter. This means that they accelerate quicker and require much less effort when climbing. The exception to this rule is aero wheelsets that sacrifice a little weight in order to slice through the air more efficiently. 23c tyres are the fastest as they offer less rolling resistance, wider 28c tyres are a little slower but offer improved cornering grip and a smoother ride. 25c tyres offer the ideal compromise and are now the most common tyre width on road bikes
Traditional calliper rim brakes are still the most common brake type on road bikes. Disc brakes are becoming more popular, especially on endurance bikes as they offer powerful and consistent braking control in all weather conditions. Mechanical disc brakes are found on the more affordable models but some experienced cyclists find these a bit harsh. Hydraulic disc brakes offer improved modulation making it easier to apply just the right amount of pressure for smooth stopping control.