My Co-Motion Americano 62cm with V-brakes has had front brake shudder since I bought it. A "brake booster" helped some as did Koolstops and lots of toe in but it's still there sometimes. Co-Motion will sell me a disk fork for $395 - that should cure it, just don't know if it's worth it. Might just be characteristic of large frames - and they built the frame with a longer than standard headtube to accommodate my height and reach.