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How Mountain Bike Gears Workfrom: Maxx Adventure Travel
The gears in mountain bikes are constantly getting more and more intricate, with current bikes having 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 purpose behind all these gears is to allow a rider to crank the pedals at a constant pace no matter what kind of slope the bike is traversing. To understand this better picture 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're pedaling at a speed of 50 RPM, this means the bike can cover over 340 feet of ground per minute. This is only 3.8 MPH, which is the equivalence of walking speed which 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 lots of gears will give you a large number of increments between a 1:1 gear ratio and a 6.5:1 gear ratio so you can always pedal at 50 RPM, no matter how fast you're actually travelling.
On a normal 27 speed mountain bike, six of the gear ratios are so close to each other that you're not likely going to notice any difference between them.
With actual use, bike riders tend to choose a front sprocket suitable for the slope they're riding on and stay with it, although the front sprocket can be difficult to shift under heavy load. It's much easier to shift between the gears on the rear.
If you're cranking up a hill, you should 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.
It goes without saying that gears are very important to mountain bikes, since they dictate your overall speed. Without gears you wouldn't be able to build speed nor will 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 properly.
Bmx Bikes For Sale News
Stories that have made news across Melbourne this week - Herald Sun
Stories that have made news across Melbourne this week
New dresses worth up to $2000 are on sale for $150-$300 at a Ferntree Gully op-shop, after they were donated by a boutique. PATS on the back to firefighters who saved a dog that passed out ... BMX Olympic medallist Sam Willoughby will next week be in ...
Jewel Chest fundraiser a huge success - Baxter Bulletin
Jewel Chest fundraiser a huge success
“One income makes it hard to buy the clothes they need with bills and still have money for extras,” this mother writes. Boy, 15 ... Girl, 14, would like make-up, good hair straightener, blow dryer, curling iron, Dove hair and body set, and hair mousse ...
New venue provides excitement - Redditch Standard
New venue provides excitement
The Redditch club hosted their annual dinner the night before but still the turnout was excellent as a new and interesting venue awaited those who travelled, with parts of the old BMX track being used to spice up an otherwise fast but slippy track. The ...
Theater and arts listings for December 5 - Daily Herald
Theater and arts listings for December 5
ALL WHEEL SPORTS -- Dancers, trampoline artists, aerialists, pro scooters and cheer stunts with extreme skaters and bike riders. 7:30 p.m. Sat. Eccles Center, Park City. $20-plus. ... DOWDLE FOLK ART -- Non-profit holiday fundraiser extravaganza ...
Best Buy, Amazon, Walmart top Black Friday 2013 winners: Cyber Week sales up - Examiner.com
Best Buy, Amazon, Walmart top Black Friday 2013 winners: Cyber Week sales up
Finally, check out Walmart's Cyber Week deals with new specials added each day this week. Today you can pick up the Fisher-Price Jake and the Neverland Pirates Jake's Musical Pirate Ship Bucky for just $30 or a 20-inch BMX kid's bike for $49.
Dad's anguish at theft of mountain bike and scooter - Gympie Times
Dad's anguish at theft of mountain bike and scooter
The BMX bike was soon recovered, dumped nearby with a flat tyre. Mr Watson, on a disability pension undergoing chemotherapy for leukaemia, said the theft was "a kick in the guts" after scraping together money to buy the bike and scooter. The mountain ...