Wheels are a marvel of engineering, even with such thin spokes, seemingly delicate rims, and hubs which must endure so much stress. They appear spider-web like, spinning and looking amazing while at the same time potentially fragile. Yet bike wheels are stronger than they look and exceptionally well-suited to their task. Your bike contacts the ground through the wheels, so your ride quality is heavily dependent on the wheel quality. A deep-walled, triangular, aero triathlon wheel slices through the wind - but as for comfort and compliance, it isn't up to the same levels as all-around road rims. Wheels are constantly spinning, and for the most part it's your pedals turning that is keeping your wheels going round. Because of inertia, the more weight at the outer edge of bike wheels - think rims, tubes and tires - the more energy, or power, is required to get those wheels turning. That's what is referred to as spin-up. This concept is most notable when you are accelerating and climbing, when you need wheels to react more quickly. On the other hand, when you are hammering along on the flats at a steady pace, it turns out that heavier hoops do a better job at keeping you at speed. Wheels must support your weight and keep in their nice, round form no matter what road or trail surface you are riding, no matter what objects or potholes you encounter. Quality wheel brands and models will roll true and strong for years, lasing you many enjoyable miles. You can think of your wheels as your bicycle's wings. A solid-built, burly wheel designed to handle downhilling riding resists flexing more than a wheel made for time trial racing, as an extreme example. The wheel for downhill use will set up a lot more stiff than the more fragile, lightweight aero wheel. Nicely engineered wheels, built light and strong, feel like you are soaring along the road, flittering on the trail, with controlled speed and technical precision. When wheels begin to feel old or heavy, or they are just beat-up and getting out of true, riding is less enjoyable as you wobble along, wishing for the smooth feel of nice wheels on your bike. You should regard your wheels as the hardest-working parts of your bike. They are holding round, keeping you going smooth, and in so doing, your wheels ideally should match your riding style. If you are riding a commuter bike packed with bags or panniers, your bike wheels need to be able to accomodate the extra weight. Or, it could be a matter of color, if you ride a fixie and want to get a coordinated bike look going. With a wide selection of purpose-built wheels here on QBike, you'll find just the wheels to satisfy your riding needs.