Originally Posted by
son_of_clyde
An advantage of bigger gears of the same ratio as that of smaller ones is less chain tension for an equal power output. Total chain "angular displacement" (sum of the angles of the individual links) will be the same.
I think that explanation is backwards:
- A larger cog/chainwheel pair has a smaller chain link angular displacement.
- As long as gear ratios are the same, chain tension is the same for all cog/chainwheel pairs.