I pulled the dura ace 12-25 in favor of the 11-28 6700. Why? Because of price. Works just as well as the 7900 at 1/2 the cost. Sure it adds a couple of grams but to be honest I can't tell the diffrence. I wanted a 11 for the down hill and 28 for the climbs. I have loved having the extra high and extra low gears here in Utah. We have some good hills and I have a few extra pounds I haul around. All the rest of the parts are 7900.