Upgrading your wheels is the single most effective upgrade that you can make. Reducing rotating mass makes scientific sense, but a lightweight, well-built alloy or carbon wheelset will add stiffness, control and high speed handling to your bike's performance. Choose from clinchers and tubular tyre types and narrow down your search to your specific discipline. AT Planet X we are a bike wheels mega store- with a huge range from top brands like Shimano, Mavic and DT Swiss. For road, time trial / triathlon, track and mountain bike wheels- we are the industry leaders.