I have done extensive research on profile design products, which was the determining factor in purchasing a pair of Profile Altair 52 full carbon tubular wheels. I have just received my purchase and I know that I have made the right choice. The high standard of workmanship, design excellence, weight (Lightness) and strength. My bike also now looks complete. I'll will have my first ride soon and have no doubt of what is to come -so "watch this space"