Different kinds of bike (p.4)
Frame: The frame on the BMX bike is like a triangle. They have extra pieces to connect the tubes together so the bike can take heavier hits.
Gears: These bikes have only one fixed gear, so the bike is even lighter.
Tires: This type of bike has tires with very good traction so they can turn better.
Brakes: It also has three different kinds of brakes: a rear wheel brake, front wheel, and coaster brakes.
Wheels: The classic dirt bike has tiny twenty-inch wheels. This makes the bike astonishingly lightweight.
Pedals: The pedals on a BMX racing bike are made of an alloy, a mixture of metals, so they will be very light.
Handle bars: It has high braced handlebars that slant to the back
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