It's not really a question of better, more of different. What decides how fast the top speed of the bike is, and how nippy it is off the start is the ratio between the tooth count of the crankset, and the tooth count of the freewheel. With a smaller freewheel you can have a smaller crankset, a slightly lighter bike and get the same feel of the bike as with a bigger crankset and a bigger freewheel.
Remove the rubber cover and plug lead from spark plug. Using a bike plug spanner [cheap at your favourite auto supermart] remove plug.
Proper athletic wear, helmet, knee and elbow pads. For training, changing your bike equipment, cassette, and crankset allows you to select different gears. Use a crankset with an 11-23 cassette while training in hilly or mountainous terrain.
If you want a cheap bike mine as well go for a mongoose
Two, but this is not the same as how many speeds the BMX bike in question has. A BMX bike has a sprocket in the front, and a cog in the back and each is a gear, but is considered a single speed bicycle because two gears and a chain are required for transmission of rotational force from the crankset to the rear wheel.
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