So you only need three gears, unless…. Maybe you live in Scotland, or similar environment where there are lots of very steep mountains and no one has bothered to build Alpine roads that zig-zag gradually up the side.
This gives you a choice of 11 very low gears to choose from, depending how steep any bit of that mountain happens to be when you get to it. Going down the mountain just let gravity and the Bronson do their job. You only need 11 gears, unless…. If you find yourself in crying on a climb…. Maybe you should have opted for that single speed after all. Who dares wins. Sit back end enjoy feats that boggle the mind.
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And more. By Christopher Ashley February 23, at pm. You can think of gears as the same thing as speeds — a bike with 18 gears is an speed bike. Bikes generally have 1, 3, 18, 21, 24, or 27 speeds. Lower numbers are the low gears, and higher numbers are the high gears. First gear is a low gear. Twenty-first gear is a high gear. Shifting means going from one gear to another. You shift gears by sliding the shifter on the handlebars.
On most bikes, this shifts the chain onto a different sized ring. Downshifting means going to a lower gear, and upshifting means going to a higher gear. You can also say shift down and shift up. You can skip the rest of this section and go on to the next one.
Your left shifter will be labeled , and your right shifter will be labeled This means that for each number on the left, you get six different speeds on the right, for a total of Shifting moves the chain onto a different ring.
Moving the lever changes where the chain is. The left shifter changes the ring next to the pedals. The smallest ring is 1, the middle ring is 2, and the biggest ring is 3. The right shifter changes the ring on the rear wheel. Most bikes built in the last few years have between 8 and 11 cogs in the cassette. The largest cogs are closest to the wheel and the gears are numbered from the inside out.
The marketing department likes to multiply the number of cogs by the number of chainrings because big numbers are impressive. The chain gets moved from one cog to another or one chainring to another by means of a derailleur.
The rear derailleur is a little more complex as it has two jobs. Like the front, it guides the chain from one cog to the next, but it is also responsible for maintaining chain tension and taking up the slack when we move from bigger gears to smaller ones.
The rear derailleur is much more effective at switching gears while pedalling hard. It is important to note however, that in order to switch gears the chain must be moving forward. With both the front and the rear derailleur, when the shift cable is pulled, it will move the chain to a larger gear. When the cable is released, it will move the chain to a smaller gear.
Just remember that larger gears at the rear mean easier pedalling but more torque, and larger gears at the front mean harder pedalling but more speed. The key element that will determine how hard you work is the difference in the number of teeth the wee pointy bits that hook through the gaps in your chain between the front chainring at the front and your selected rear cog.
That means the outer ring has 50 teeth and the inner ring has 34 teeth. The rear cassette is 11 speed The combination of your selected chainring and cog determine the gear ratio. The gear ratio, combined with the circumference of your wheel and tyre determines how far you will travel with each revolution of the cranks.
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