Zarnoff Bike Blog
30Jan/100

How Mountain Bike Gears Work

That gears in mountain cycles simply maintain getting a lot more
and a lot more complex.  The bikes of today get as numerous
as 27 equipment ratios.  A mountain bike will use a
mix of three several sized sprockets in
front and nine in that back to produce items ratios.

This idea behind all those gears is to enable the
rider to crank that pedals at a constant pace no
matter what type of slope the bike may be on.  You can
understand the following improved by picturing a bike having
only a single gear.  Each time you rotate this pedals
1 turn, the rear wheel would move 1 turn
as well (1:1 equipment ratio).

Should that rear wheel is 26 inches in diameter, then
along with 1:1 gearing, a single full twist on that pedals
would result in this wheel covering 81.6 inches of
floor.  Whether you are pedaling at a velocity of 50 RPM,
that means that this bike can cover over 340 feet of
ground per minute.  The following may be just 3.8 MPH, which
is that equivalence of walking speed.  The may be ideal
meant for climbing a steep hill, even though bad to get soil
or going downhill.

To go more quickly you'll need a different ratio.  To
journey downhill at 25 MPH along with a 50 RPM cadence at this
pedals, you'll require a 5.6:1 equipment ratio.  A bike
along with a lot of gears may provide you a large number
of increments between a 1:1 supplies ratio and a 6.5:1
gear ratio so that you could continually pedal at 50 RPM,
no matter how fast you are essentially going.

Over a normal 27 speed mountain bike, six of the items
ratios are so close to each different that you can't
notice any difference between them.  

With actual make use of, bike riders tend to choose a front
sprocket suitable for this slope people are driving on
and stick with it, although any front sprocket could
be difficult to shift under heavy load.  It's much
simpler to shit between any gears on that rear.

When you are cranking up a hill, it's right to choose
this smallest sprocket on that front then shift
between this nine gears available on this rear.  That
more speeds you need on any back sprocket, any
bigger advantage you'll get.

Most in all, gears are very vital to mountain
bikes as people dictate the in general speed.  Without having
gears you wouldn't be able to build speed nor would
you be capable to pound pedals.  The gears would move
the pedals and help you build up speed.  

There are all kinds of gears for sale in mountain
bikes, all of which will help build up a lot
of energy if you use them the right method.

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5Nov/090

How Mountain Bike Gears Work

The gears in mountain bikes just keep getting more and more intricate. The bikes of today have as many as 27 gear ratios. A mountain bike will use a combination of three different sized sprockets in front and nine in the back to produce gear ratios.

The idea behind all these gears is to allow the rider to crank the pedals at a constant pace no matter 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 rotate one turn as well (1:1 gear ratio).

If the rear wheel is 26 inches in diameter, then with 1:1 gearing, one full twist on the pedals would result in the wheel covering 81.6 inches of ground. If you are pedaling at a speed of 50 RPM, this means 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 ideal for climbing a steep hill, although bad for ground or going downhill.

To go faster you'll need a different ratio. To ride downhill at 25 MPH with a 50 RPM cadence at the pedals, you'll need a 5.6:1 gear ratio. A bike with a lot of gears will give you a large number of increments between a 1:1 gear ratio and a 6.5:1 gear ratio so that you can always pedal at 50 RPM, no matter how fast you are actually going.

On a normal 27 speed mountain bike, six of the gear ratios are so close to each other that you can't notice any difference between them.

With actual use, bike riders tend to choose a front sprocket suitable for the slope they are riding on and stick with it, although the front sprocket can be difficult to shift under heavy load. It's much easier to shit between the gears on the rear.

If you are cranking up a hill, it's best to choose the smallest sprocket on the front then shift between the nine gears available on the rear. The more speeds you have on the back sprocket, the bigger advantage you'll have.

All in all, gears are very important to mountain bikes as they dictate your overall speed. Without gears you wouldn't be able to build speed nor would you be able to pound pedals. The gears will move the pedals and help you build up speed.

There are all types of gears available in mountain bikes, all of which will help you build up a lot of momentum if you use them the right way.

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20Sep/090

The Importance Of Tire Pressure In Mountain Bikes

Tire pressure is a very important facet of riding any kind of bike, including mountain bikes. By learning how to set the tire pressure, you can give yourself more control and help to make the ride down the mountain smoother. If the tire pressure is too low, then you will find that it is much harder to cycle and it can increase the chance of a flat, too. Tire pressure that is too high can make your ride very bumpy and out of control, as well.
Tire pressure can vary from person to person, because it is dependent upon the personal preference of the bicycler, the tire's condition, and the terrain that you will be riding on. The tire pressure can be easily modified simply by using a high quality pump on the tires. A tire pressure gauge is also an essential part of keeping your tires at the optimum pressure.
The manufacturer of the tire will have a recommended tire pressure for your particular tires and this is where you can start. You can then adjust the tire pressure as needed from there. It is best to use the same tire pressure gauge and pump when you check your tires, because you may get different readings depending upon the tire pressure gauge that you choose.
A good rule of thumb is to start with a higher tire pressure for your bike. This means that you want to be around 40-50 psi (3-3.5 bar), and then lower the tire pressure a little at a time to find which tire pressure is best for your particular bike, terrain, and yourself. If you are a little heavier, then you will want to use a higher tire pressure for sure.
Taking a test bike ride is the best way to check the tire pressure. You will want to notice how the tire behaves, how it rides on the terrain, how it slides down the mountain, and how it hooks in the corners. If you have too much tire pressure, then drop it in increments of 5 psi in both tires. If the bike gains grip and is more stable at this tire pressure, then you will want to keep it at this standard pressure. If not, then you will continue dropping the tire pressure in small increments and redoing the test until your bike rides the way you want and need it to.
If you want to determine the lowest possible tire pressure, then gradually decrease the tire pressure until you see how it feels when you ride on almost flat tires. This will help you to learn how it feels so that you can keep your tubes from getting damaged.
If your mountain bike tires are tubeless, then you will want to stay with a lower tire pressure. The advised tire pressure for tubeless tires is between 30 and 40 psi. This is because tubeless tires experience fewer pinch flats and even rim contact occasionally is okay. This is why you can ride on tires with a much lower tire pressure than normal. If the tire pressure is too low, you will find that if you are cornering hard that the tire will roll under the rim.
Another thing that you need to be on the lookout for is rolling resistance. The increased rolling resistance will take more effort, but it will offer you greater control and better traction to allow you to climb easier. For racers who race cross-country, they would rather have a more efficient bike versus greater control, so you have to take into consideration what kind of biking that you will be doing.
Using your hand to squeeze the tire will help you determine what the right tire pressure feels like so that you do not have to rely so much on the tire pressure gauge.

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