Depends on if you intend to race the bike or not, and which organization that is the sanctioning body for the race. UCI are boringly strict while others are less specific and will let you run pretty much anything that isn't seen as unsafe.
Pretty much as soon as there were enough bicycles to hold a race
Colnago Cycling offer bicycles for sale. They produce high quality road racing bicycles. They were founded in 1954 and have their headquarters in Cambiago, Italy.
One can read reviews on racing bikes online on Bika Radar, Road Cycling UK, Road Bike Action, Bikesoup, Bikerumor, Cycling Weekly, and on Roadbike Review.
When purchasing road bicycles, key features to consider include the frame material, bike size, gearing system, wheel size, brake type, and overall comfort and fit for the rider.
Gitane bicycles are available in various models, including road bikes, mountain bikes, hybrid bikes, and electric bikes. Each model is designed for different types of riding, such as racing, off-road trails, commuting, or leisurely rides.
Road bicycles.
For off reading you need 4 wheel drive but for the road or for racing you need rear wheel drive and for rallying 4 wheel drive
Road bikes are typically faster than other types of bicycles due to their lightweight frames, narrow tires, and aerodynamic design. They are designed for speed and efficiency on paved roads, making them a popular choice for racing and long-distance riding.
Depends on the bike. Some lightweight road(race) bikes actually comes with rider restrictions. But otherwise it's just about always possible to build a bike strong enough for the majority of riders.
Bicycles should ride on the right side of the road, in the same direction as traffic.
The standard road handlebar diameter for most bicycles is 31.8 millimeters.
Road bikes are designed for fast and efficient riding on paved roads. They are lightweight, have narrow tires, and a more aerodynamic frame compared to other types of bicycles. This makes them ideal for long-distance rides, racing, and high-speed cycling. Unlike mountain bikes or hybrid bikes, road bikes are not suitable for off-road terrain or rough surfaces.