The Ring & Pinion gear ratio example 41:15 yields which of the following?

The Ring & Pinion gear ratio example 41:15 yields which of the following?

• A. 4.10:1
• B. 2.73:1
• C. 3.54:1
• D. 2.50:1

Answer: (B)

Understanding how to read a ring-and-pinion ratio: the overall gear reduction is found by dividing the ring gear teeth by the pinion teeth. Here, the ring has 41 teeth and the pinion has 15 teeth, so 41 divided by 15 equals 2.733..., which rounds to about 2.73:1. This means the pinion (input) must rotate about 2.73 times for the ring gear (output) to complete one full turn, producing roughly 2.73 times more torque at the wheels (ignoring losses) and reducing speed accordingly. The given numbers don’t match the other ratios because they would require different tooth counts, e.g., 41/10 would be 4.1:1, not 2.73:1.

Understanding how to read a ring-and-pinion ratio: the overall gear reduction is found by dividing the ring gear teeth by the pinion teeth. Here, the ring has 41 teeth and the pinion has 15 teeth, so 41 divided by 15 equals 2.733..., which rounds to about 2.73:1. This means the pinion (input) must rotate about 2.73 times for the ring gear (output) to complete one full turn, producing roughly 2.73 times more torque at the wheels (ignoring losses) and reducing speed accordingly. The given numbers don’t match the other ratios because they would require different tooth counts, e.g., 41/10 would be 4.1:1, not 2.73:1.