With the race gas at $12/gal I suppose better mileage would be a plus, but I just to be able to use the extra giddy-up I hope to have for the 09 season. I'm running 16/44 now and would rather buy a front sprocket than a couple of new rears. > What are you planning on doing? Entering the mileage sweepstakes? You > won't even need fifth or sixth gear.