At the rear they're called sprockets(unless you speak BMX, then they're called drivers), at the front they're called chainrings, or chainwheels(unless you speak BMX, where they might be called sprockets)
An 11-speed cassette is compatible with a 25-tooth cog on a bicycle.
A cog is a wheel with projecting teeth. These can turn either another cog or a chain.
The function of a bicycle cog is to transfer power from the pedals to the wheels by engaging with the chain. Cogs are part of the drivetrain system and work together with the chain and other components to control the speed and efficiency of the bike.
The gear ratio of a bicycle with a chainring size of 53 teeth and a cassette cog size of 39 teeth is 1.36:1.
velocipede
A cog is a mechanism that allows the transferral of energy from one site to another. A 'cog' is a single tooth on a gear wheel.
The rear cog in a bicycle's drivetrain system is responsible for transferring power from the pedals to the rear wheel, allowing the bike to move forward. It works in conjunction with the chain and front chainrings to control the speed and resistance of the bike.
The purpose of a fixed gear cog in a bicycle's drivetrain system is to directly connect the pedals to the rear wheel, allowing for a direct and continuous transfer of power from the rider's legs to the wheel without the ability to coast.
cog
bone shaker, hobby horse.
The purpose of a fixie cog in a fixed-gear bicycle is to directly connect the pedals to the rear wheel, allowing the rider to control the bike's speed and direction by pedaling forward or backward. The size of the fixie cog affects the gear ratio, which in turn impacts the bike's speed, acceleration, and overall performance.
The purpose of a fixed gear lockring is to secure the fixed gear cog onto the hub of a fixed gear bicycle. This helps to prevent the cog from loosening or coming off while riding, ensuring a smooth and consistent pedal motion. The lockring contributes to the functionality of the fixed gear bicycle by maintaining the connection between the cog and the hub, allowing the rider to control the speed and direction of the bike effectively.