Two Types of Shifters.

• A. Thumb Levers and Twisting Handlebar Grip
• B. Bar-end Shifters
• C. Electronic Shifters
• D. Brake Levers

Answer: (A)

Shifting on most bikes happens in two main forms you can use without taking your hands off the bars: thumb-operated levers and twist-grip shifters. Thumb levers sit near the brake hood and are pressed by the thumb to move gears up or down. Twist-grip shifters are built into the handlebar grip and you rotate the grip to change gears. These two mechanisms cover the common ways riders shift while maintaining control and contact with the handlebars, which is why they’re identified as the two types. Other options describe specific placements or technologies (bar-end shifters, electronic shifters) or are for braking (brake levers), but they don’t define the two basic shifting methods.