Hub motor and diesel engine: what they have in common

1. Step 1. Hub motor — is part of — Electric bicycle. A hub motor or a mid-drive motor.
2. Step 2. Electric bicycle — has part — Roller chain. The chain drive from the pedals remains.
3. Step 3. Roller chain — is part of — Combine harvester. Chain drives power the working parts.
4. Step 4. Combine harvester — has part — Diesel engine. Self-propelled combines run on diesels.

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