Originally Posted by patentcad

Again, don't confuse riding with racing. I have never seen a climb in a race that couldn't be handled with a 39 x 21 or 23, that's amateur Cat 3/4 racing. That doesn't mean they don't exist, but they are few and far between. Even then, a 39 x 25 should do it. Again, if you need something lighter, I don't think you'll be racing. You'll be riding the same course as the guys who are racing up ahead of you. Wait, that sounds like how I 'race'.