Estimation question
How many passenger car tires will be sold in financial year 2022-2023 in India?
- Amazon
- Estimation
- Medium
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What this question tests
Whether the candidate can build a market sizing estimate using vehicle population, replacement cycle, and regional context in India.
How to approach it
- State scope: assume passenger car tires sold in India in FY22-23, including both new-vehicle original equipment tires and aftermarket replacement tires.
- Estimate India's passenger vehicle installed base, roughly 40 to 45 million cars on the road, as a stated assumption.
- Assume an average tire replacement cycle of roughly 3 years per set of 4 tires, meaning roughly one-third of the fleet replaces tires annually.
- Calculate replacement tires: 42 million cars divided by 3, times 4 tires, gives roughly 56 million replacement tires per year.
- Add new vehicle sales: roughly 3.5 million new cars sold annually times 4 tires gives roughly 14 million, for a total estimate of roughly 65 to 70 million tires.
What a strong answer includes
- Separates replacement demand from new-vehicle original equipment demand, since these are two distinct and additive sources.
- States the tire replacement cycle assumption explicitly and explains why 3 years is reasonable for Indian driving conditions.
- Lands on a combined range rather than a single overly precise figure.
Common mistakes
- Counting only new vehicle sales and ignoring the much larger replacement tire market.
- Not stating the replacement cycle assumption, making the calculation impossible to follow.
Likely follow-up questions
- How would rougher road conditions in certain regions change your replacement cycle assumption?
- How would growing EV adoption affect this estimate over time?
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Learn the skill behind it
Chapters of the AI PM course that teach what this question tests.
- Chapter 2: Data fluency: SQL, logs, and reading the truth yourself
- Chapter 9: Prove it paid off: outcomes, economics, and pricing
- Chapter 14: Get the job: the AI PM interview loop