The gears in mountain bicycles just keep getting more complicated. The bikes of today have as much as twenty-seven gear ratios. A mountain bike will utilize a
Aggregate of three different sized sprockets in front and 9 in the back to produce gear ratios.
The basic concept behind all these gears is to allow the rider to crank the pedals at a unceasing pace regardless of what kind of slope the bike is on. You can understand this better by picturing a bike with just a single gear. Each time you rotate the pedals one turn, the rear wheel would revolve one turn as well ( eleven gear ratio ).
If the rear wheel is twenty-six inches in diameter, then with 11 gearing, one full twist on the pedals would lead to the wheel covering 81.6 inches of ground. If you’re pedaling at a speed of 50 R.p.m, this suggests that the bike can cover over 340 feet of ground per minute. This is only 3.8 Mph, which is the equivalence of walking speed. This is perfect for climbing a steep hill, although bad for ground or sliding downhill.
To go quicker you’ll need a different ratio. To ride downhill at twenty-five Mph with a fifty R.p.m cadence at the pedals, you’ll need a 5.6:1 gear ratio. A bike with a large amount of gears will give you a sizeable number of increments between an eleven gear ratio and a 6.5:1 gear ratio so you can always pedal at 50 Revs per minute, regardless of how fast you are actually going.
On a normal twenty-seven speed mountain bike, 6 of the gear ratios are so close to one another that you cannot notice any difference between them.
With tangible use, bike riders tend to select a front sprocket appropriate for the slope they’re riding on and stick to it, although the front sprocket can be difficult to shift under heavy load. It’s way easier to shit between the gears on the rear.
If you’re cranking up a hill, it’s best to select the smallest sprocket on the front then shift between the 9 gears available on the rear. The more speeds you have on the back sprocket, the larger advantage you could have.
At the end, gears are critical to mountain bikes as they dictate your overall speed. Without gears you wouldn’t be in a position to build speed nor would you be in a position to pound pedals. The gears will move the pedals and help you build up speed.
There are all sorts of gears available in mountain bikes, all of which will help you build a lot of momentum if you use them the right way.
Learn more about santa cruz mtb and yeti bikes, visit http://http://intensebikes.org/.
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April 10, 2011
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