Speed and comfort of a racing bicycle? I just saw this guy called Jason Rourke breaking the record of 112.94mph (181km/h) on his bicycle. I wish I could have such a bicycle to ride, but I have never ridden a racing bicycle with gears.

I want to use the bicycle for the 26-30mi commute that I do everyday and if it is a racing bike it could potentially save time. But I have some doubts/questions:


Do these cycles really produce speed of around 60 - 70 km/h? If so, where could I get them?
Are these stable at these high speeds of about 50km/h?
I want to use the bicycle for the 26-30mi commute that I do everyday and if it is a racing bike it could potentially save time


A trained cyclist can definitely ride farther and faster on a road bike than on a hybrid bike, based solely on wind resistance and bicycle fit. However, the speeds you list are completely unrealistic. Bike speeds are based primarily on the rider. Other major considerations include the route and the physical shape you want to arrive in.

A 30 mile commute means you are riding 15 miles in each direction. I know a lot of people who bicycle commute this distance every day. They are all in excellent physical shape and ride at least 2,000 miles a year. (3,218 kilometers)

Assuming:


A 15 mile route with few if any stops
A good road surface (paved, minimal bumps)
Few intersecting roads
Dry weather
Fairly flat ride


All of the commuters I know could easily finish the ride in less than 1 hour. (averaging over 15 mph). Many of them could average 18 mph for the entire ride. A few might be able to average 20 - 21 mph.

However, They will all arrive at their destination dripping sweat and need a shower and a change of clothing. If it rains, your average speed will go down significantly, since it just isn't safe to ride as fast on wet pavement.

So practically speaking, unless you are a highly trained athlete, doing 15 miles any faster than 20 - 21 mph is probably out of the question. Much more likely that you will do 15 - 18 mph. (And that's for a trained cyclist.) You then have to worry about cleaning up once you reach your office.

Getting one of the special bikes you mentioned will most likely slow you down, since they are designed for ultra high speeds with gearing that simply won't work in a city.