Mountain Bike Gear Ratio Chart. A smaller number is easier to accelerate and can still be pushed on steep climbs. Gear ratio's in the bike gear ratio chart are determined by dividing the number of teeth on the front chainring by the number of teeth on the rear cog.
Let's understand these numbers in depth. Gear ratio's in the bike gear ratio chart are determined by dividing the number of teeth on the front chainring by the number of teeth on the rear cog. Riding mostly flatland singletrack is a lot different from riding mountain trails, for example.
A larger number indicates a large gear that is harder to turn over and is used for higher speed.
See discussion about making changes (below).
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Using a gear-inch chart is one way to compare gear ratios without riding the bike. You love to climb and don't want to lose that gear that gets you up the hill. You come around a turn, their in front of you is a steep windy climb, replete with bare slippery tree roots!