How difficult is it to change the front sprocket? Is there enough play (chain adjustment) on a new bike to fit ok? It sounds like most everyone who has changed from the stock 17T to 18T prefers the 18T better. I spend about 50/50 balance between city and highway riding and currently use 5th quite a bit around town. From about 40 mph up I'm in 5th. Separating the gears a little with a higher top gear seems like it would make a lot of sense.
