Originally Posted by
Bah Humbug
The 29t bottom cog will be over 26% easier than your current 23t. The 12-27 will be over 17% easier. Frankly, the 27t would probably be fine, especially if you keep riding and get fitter. Take your pick, but I'd keep the crankset.
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.