op...before your thread goes completely culinary...
i see that you posted in a couple other threads that you plan on putting a big chainring on your new cog.
i am not saying it won't work but i have a ss 29er that at one time i was determined to turn into a do-everything bike & give it better road gearing.
here is something i learned...
do you see how the chainstays really widen out to accommodate those big 29" mtb tires? well you better double-check your bike to see if it has clearance for the big chainring you have planned. fyi, the biggest ring my bike can take before it hits the stay is 39t & it is so close that i won't even use it.
good luck...