I am one down in front and one up in the rear (46). I wanted to try 47 rear in the last group buy but it didn't work out. With a stock front and one up in the rear, I don't think that you would be able to tell the difference. It is hard to get steel rear sprockets. If you want to go more than one tooth, I think it would be better to just do the front and it is cheaper also. If I rode long trips, I would leave it stock, I don't.