6/24/2023 0 Comments Wheel size comparison![]() ![]() They almost always come with training wheels (except for kids’ balance bikes).Ī bike with 16-inch wheels is the right size for most four- and five-year-olds. These bikes are best suited for most three-year-olds and some four-year-olds. The smallest children’s bike wheel size, a 12-inch bike wheel is usually found on training bicycles for toddlers and young kids. That means a 16-inch kid’s bike wheel always comes on the same size bike frame (barring custom or nonstandard bikes). Kids’ bike wheel sizes start at 12 inches and go up to 20 inches-and unlike other bikes, the wheel size of a child’s bike is typically tied to the frame size. Meanwhile, oversized bike wheels at 30 inches or larger are typically custom-builds for people with very large frames.įor data geeks, has a detailed bike wheel size chart with the most common wheel sizes. 29″ refers to the outer diameter of the wheel, while 622mm refers to the wheel’s bead seat diameter.īikes that have 24-inch wheels or smaller are typically kids’ bikes, but sometimes specialty rides like BMX bikes. That’s because these measurements don’t refer to the same part of the wheel. The math is misleading, as 29″ doesn’t equal exactly 622mm. Standard 29″ wheels are exactly the same as ISO diameter 622mm wheels which are sometimes referred to as 700c wheels. Note: The conversions here are not exact. The majority fall into a standard range that starts at 26 inches (or 559 millimeters) and goes all the way up to 29 inches (or 622 mm). ![]() Today’s bicycle rims and tires come in a vast range of sizes, ranging from a minuscule 12 inches to a larger-than-life 36 inches. This is the notation you’re the most likely to encounter while shopping for a new bike in the US. With the sole exception of 700C (the most common size for today’s standard road bikes), these width notations are no longer in use by modern bike manufacturers.įinally, the American Standard is the inch-based notation that you see in big-box retailers in the United States. A 700C tire would be wider than a 700B tire, for instance. The letters in French sizes refer to varying widths within the same wheel and tire diameter. The second bike wheel sizing system is the French Standard, which is mostly in use when referencing vintage models. This eliminates the problem of localized sizing systems creating confusion by referring to the same size by multiple names. The first, International Organization for Standardization (ISO) developed with European Tyre and Rim Technical Organization (ETRTO), is the most commonly used bike tire naming systems today.īy the ISO standard, bike wheel and tire sizing refer to the actual diameter (in millimeters) of the wheel itself, not the outside dimensions of the tire that fits it.ĮTRTO works with ISO to specify concrete standards for rim and tire sizing across countries and manufacturers. Whether you walk into a bike shop or go comparison-shopping online, you’ll find that tire and wheel sizing comes in three formats. There’s no substitute for walking into a bike shop and sitting down on a floor model to gauge fit, but you can save time by knowing what sizes are most likely to work for you and your riding style. Some bikes, like mountain bikes, have suspension and tire options that can alter the height of the bike, so the tire size isn’t always indicative of how your body will fit the bike.
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