Cyclocross dates back to the early 1900s as European road racers looked for a training tool during the fall and winter. As cyclocross gained popularity, bike companies started producing bikes designed specifically for cyclocross. The cyclocross bikes use a road bike design with differences in the frame geometry, tire clearance, brake systems and components.
Frame
The frame used on cyclocross bikes uses a road bike base with slight modifications in the design and components. While riding a cyclocross course, you can encounter muddy terrain. As a result, the frame on cyclocross bikes has a wider stay to allow mud-covered tires to move freely, and the bottom bracket is higher for better tire clearance over obstacles and rocks.
Weight
Cyclocross courses take place on varied terrain such as river crossings, steep climbs, man-made barriers or technical trails that might be impossible to ride. This type of terrain requires you to dismount the bike and carry the bike along the course. The aluminum frames are lightweight and feature cable routing though the top tube that improves the comfort while carrying the bike over the obstacles.
Components
Cyclocross athletes choose specific components such as brake systems, pedals and chain rings to improve overall performance. Cantilever or V-brakes are commonly chosen by cyclocross riders and are chosen on a personal preference. These brake systems provide the control and stopping power over the various terrain. Outer chain rings on cyclocross bikes is typically a 44- to 50-teeth design and a 39-teeth design on the inner chain ring.
Tires
Tires and wheels on the cyclocross bikes are as important as the frame design and components. The most common size of wheels on cyclocross bikes is a 700c that allows for maximum ground clearance and ability to ride over varied terrain. The tires feature a wide, knobby design that helps to clear mud while improving traction and control over technical trails.
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