Originally Posted by
Frankfast
Thanks, if that works it would be the best(cheapest) case scenario. What's the advantage of the 27 over the 29 since that cog would only be used on the steepest hills? If 29 is too tall you can always shift down.
The 12-27 goes:
12,13,14,15,16,17,19,21,23,25,27
The 12-29 goes:
12,13,14,15,16,17,19,21,23,26,29
The only difference is on the 12-27, the last two cogs are 2-tooth jumps instead of 3-tooth. That means they'll involve a less-severe change in cadence. How much that matters is up to you; I thought the 12-27 might add an 18t cog in the middle, but apparently not.