Speed Road Bike
Friday, November 12th, 2010
What is an equivalent speed bike from the Mountain Bike on the pavement and road bike so high on the pavement?
I ride mountain bike about 10 miles each day in the streets around my house and usually average 15-16 miles per hour. I know tires add a lot of drag, so I was wondering what would be my speed on a road bike that had less resistance. I'm considering getting a bike good road, but I'm not interested in aero-bars or other towed gear.
This is a very good question. I think the answer depends on several factors. With regard to drag, road tires will allow you to roll faster. However, not all mountain bike tires are equal. In fact, some knobbies with a central segment real good roll smoothly on the pavement. In addition, some knobbies create drag horrible. Therefore, the gain of tires only depends on what is currently running on your mountain bike. A road bike will allow you to achieve a more aerodynamic position in the bar drops. How willing and able you are to get a facelift in your road bike affect your speed on everything. A road bike of course, has no suspension so you do not have energy loss due to shake. Of course, if you lock the suspension, while on the road this will not make any difference. A road bike is almost certainly weigh less than a mountain bike so you get a win there, especially if your Travel is rough. A big win, however, will come from the lighter wheels and tires of the road bike. As energy needs, a gram rotating mass is much heavier than a gram non-rotating. Therefore, the reduced rotational mass allows you to go faster and accelerate the fastest bike. Therefore, ultimately, the big difference can be expected? Weight, aerodynamics, and reduced rotating mass I think you can expect to collect 3.2 miles from hour. Depending on other factors that may be able to pick up even more. Hope this helps and I hope you have a lot of fun finding the answer to your question. Good luck to you.
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