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Think about it this way, your gear ratio or ‘final drive ratio’ is changed so your tire rotates more or less per sprocket rotation right.

Tire size plays a big role in your gearing. Gearing up may also be called going taller, and gearing down may be called going shorter. The term ‘gearing up’ or ‘gearing down’ refers to changing one of your sprockets out with one that has a different amount of teeth, to change your gear ratio. For example if your rear sprocket had 40 teeth and your front sprocket had 12 teeth. To obtain your gear ratio is simple, you can use the chart provided below, or simply divide the number of teeth on the rear sprocket, by the number of teeth on the front sprocket. The larger the gear ratio number, the more acceleration you’ll get.

Just remember, the smaller the gear ratio number, the more top speed you’ll get. If you’d prefer to skip all the details about gear ratio, there is a chart below you can use to decide what number of teeth you want your sprockets to be.

But to understand gearing up or gearing down and what it means to your gear ratio, you have to know what the gear ratio is actually a calculation of. You may have also heard people talk about a ‘taller’ or ‘shorter’ gear ratio. A lot of riders will use terms like ‘gear up’ or ‘gear down’ to describe the changes to their gear ratio by swapping out a sprocket for one with a different number of teeth. The two main reasons to alter the gear ratio of your ATV is to get more acceleration or to get more top speed.