120 teeth up front, 14 in the back: what does that mean?😳

120 teeth up front, 14 in the back: what does that mean?😳 Check out this homemade Japanese bike and its unusual gearing: a hundred and twenty teeth on the front chainring and only fourteen on the rear cog. Do the math, and the ratio works out to roughly eight and a half to one, meaning each pedal turn spins the rear wheel many times over. It’s a hands-on look at how gear ratios work on a bicycle. For educational purposes only. ⚖Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statutes that might otherwise be infringing. Non-profit, educational, or personal use tips the balance in favor of fair use. #unique #interesting #shorts