I bought a 3T ARX LTD stem, it's all carbon except face plate and bolts. Weighs about 10 grams less than the ARX II alloy stem it replaced. Absolutely no difference in ride and It looks like the alloy one except up close. I bought it to keep with the matched parts theme. I wanted carbon and could afford it so I bought it. If I were concerned about weight that Extralight looks like the way to go. I really like the stem but I was honest with myself, it's not going to work any better than alloy.