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Cyclo-cross bicycle
A cyclo-cross bike or cyclo-cross bicycle (abbreviated CX Bike or CXB) is a bicycle specifically designed for the rigors of a cyclo-cross race. Cyclo-cross bicycles roughly resemble the racing bicycles used in road racing. The major differences between the two are the frame geometry, and the wider clearances that cyclo-cross bikes have for their larger tires and mud and other debris that they accumulate.
Cyclists have been competing in races on road-going bicycles since the 19th century. Cyclo-cross emerged as a sport in its own right in France in 1902. Cyclo-cross bicycles are similar to other bicycles, but the frame geometry is closer to a mountain bike than a road racing bicycle. The top tube is often longer and closer to horizontal, and the handlebars are higher, again akin to mountain bikes. The emphasis on bicycle handling skills differentiates cyclo-cross from road racing. Cyclo-cross courses are held on a variety of terrain, including grass, mud, sand and paved surfaces.
There are many stories about the origins of cyclo-cross - and so about the origin of cyclo-cross bikes. What can be assumed to be certain is that the cyclo-cross bikes are a further development of normal racing bikes, which have been adapted to the needs of cyclo-cross sport. Today, they are often described as having a mixture of mountain bike and road bike characteristics, but in fact existed decades before mountain bikes were introduced in the bicycle world.
The first explicit cyclo-cross bicycles appeared in the 1960s, manufactured by European companies from the Netherlands, Belgium and Italy. At first the frames were usually made of steel; nowadays, aluminum and carbon fibre are more common, at least in regard to cyclo-cross bikes built for racing.
Frame materials are selected with an aim to produce a lightweight, yet stiff and responsive frame. Low weight is prized for ease of carrying while running. Cyclo-cross racers may lift or carry their bikes as many as 30 times in one 60 minute race, increasing the desire for a lightweight bicycle. Aluminum frames were popular in cyclo-cross bicycles long before they became commonplace on the road. Today[when?] the most popular material is aluminium with carbon fiber being popular at a professional level.
Cyclo-cross frames require clearance for slightly wider (generally 30–34 mm) tires and the debris and mud that is picked up by them. They are typically very simple, often eschewing bridges between the rear stays. Compact geometry frames with sloping top tubes are less common than on road bicycles due to the need to carry the bicycle easily on the shoulder. Top tube (rather than bottom bracket) routed derailleur cables help combat the build-up of mud. Some specialist cyclo-cross bikes also have a higher bottom bracket to aid clearance over rough ground; extra clearance could prevent toe clips from dragging while re-mounting after an obstacle. This is less common as clipless pedals have become the norm for cyclo-cross.
Typically, the frame geometry is somewhat more relaxed than that of a road bike, not as upright in the seat tube, which allows for more stability in soft ground. Also, the wheelbase can be a bit longer, which provides a more planted feeling when using aft body weighting over rough terrain, and can help keep the rider's feet from contacting the front wheel during a tight turn.
Choices of equipment tend more towards the idiosyncratic than in road racing; for example single-speed bicycles also have some popularity due to the advantage of mechanical simplicity in the often very muddy conditions and the fringe nature of the sport. Gearing is typically lower, with most common setups using a 46-36 (110mm BCD) or 48-38 (130mm BCD) chainring combination with a 12–25 to 12-30 cassette. Some riders opt to use a single chainring in the front (typically a 40-42 tooth chainring) while retaining multiple sprockets in the rear cassette. This has some of the advantages of the single-speed: the weight of the front derailleur and the front shift lever are lost, a single chainring allows for a tighter chainline, thus reducing the chance of throwing a chain on a bumpy course, and further, racing is psychologically simpler.
Hub AI
Cyclo-cross bicycle AI simulator
(@Cyclo-cross bicycle_simulator)
Cyclo-cross bicycle
A cyclo-cross bike or cyclo-cross bicycle (abbreviated CX Bike or CXB) is a bicycle specifically designed for the rigors of a cyclo-cross race. Cyclo-cross bicycles roughly resemble the racing bicycles used in road racing. The major differences between the two are the frame geometry, and the wider clearances that cyclo-cross bikes have for their larger tires and mud and other debris that they accumulate.
Cyclists have been competing in races on road-going bicycles since the 19th century. Cyclo-cross emerged as a sport in its own right in France in 1902. Cyclo-cross bicycles are similar to other bicycles, but the frame geometry is closer to a mountain bike than a road racing bicycle. The top tube is often longer and closer to horizontal, and the handlebars are higher, again akin to mountain bikes. The emphasis on bicycle handling skills differentiates cyclo-cross from road racing. Cyclo-cross courses are held on a variety of terrain, including grass, mud, sand and paved surfaces.
There are many stories about the origins of cyclo-cross - and so about the origin of cyclo-cross bikes. What can be assumed to be certain is that the cyclo-cross bikes are a further development of normal racing bikes, which have been adapted to the needs of cyclo-cross sport. Today, they are often described as having a mixture of mountain bike and road bike characteristics, but in fact existed decades before mountain bikes were introduced in the bicycle world.
The first explicit cyclo-cross bicycles appeared in the 1960s, manufactured by European companies from the Netherlands, Belgium and Italy. At first the frames were usually made of steel; nowadays, aluminum and carbon fibre are more common, at least in regard to cyclo-cross bikes built for racing.
Frame materials are selected with an aim to produce a lightweight, yet stiff and responsive frame. Low weight is prized for ease of carrying while running. Cyclo-cross racers may lift or carry their bikes as many as 30 times in one 60 minute race, increasing the desire for a lightweight bicycle. Aluminum frames were popular in cyclo-cross bicycles long before they became commonplace on the road. Today[when?] the most popular material is aluminium with carbon fiber being popular at a professional level.
Cyclo-cross frames require clearance for slightly wider (generally 30–34 mm) tires and the debris and mud that is picked up by them. They are typically very simple, often eschewing bridges between the rear stays. Compact geometry frames with sloping top tubes are less common than on road bicycles due to the need to carry the bicycle easily on the shoulder. Top tube (rather than bottom bracket) routed derailleur cables help combat the build-up of mud. Some specialist cyclo-cross bikes also have a higher bottom bracket to aid clearance over rough ground; extra clearance could prevent toe clips from dragging while re-mounting after an obstacle. This is less common as clipless pedals have become the norm for cyclo-cross.
Typically, the frame geometry is somewhat more relaxed than that of a road bike, not as upright in the seat tube, which allows for more stability in soft ground. Also, the wheelbase can be a bit longer, which provides a more planted feeling when using aft body weighting over rough terrain, and can help keep the rider's feet from contacting the front wheel during a tight turn.
Choices of equipment tend more towards the idiosyncratic than in road racing; for example single-speed bicycles also have some popularity due to the advantage of mechanical simplicity in the often very muddy conditions and the fringe nature of the sport. Gearing is typically lower, with most common setups using a 46-36 (110mm BCD) or 48-38 (130mm BCD) chainring combination with a 12–25 to 12-30 cassette. Some riders opt to use a single chainring in the front (typically a 40-42 tooth chainring) while retaining multiple sprockets in the rear cassette. This has some of the advantages of the single-speed: the weight of the front derailleur and the front shift lever are lost, a single chainring allows for a tighter chainline, thus reducing the chance of throwing a chain on a bumpy course, and further, racing is psychologically simpler.