![]() This same rim size was adopted by the early pioneers of west-coast "klunkers", and became the standard for mountain bikes. Although they are still called "26 inch", these tires are actually 25 5/8", not 26". The industry responded by making "middleweight" tires marked 26 x 1.75 to fit the same rims. Some riders, however, were dissatisfied with these tires, and wanted something a bit lighter and faster. This size tire is very close to 26 inches in actual diameter. Here's how it works: Let's start with the 26 x 2.125 size that became popular on heavyweight "balloon tire" bikes in the late '30's and still remains common on "beach cruiser" bikes. Unfortunately, evolution of tires and rims has made these measurements lose contact with reality. This would usually be measured in inches (26", 27", etc.) or millimeters (650, 700, etc.). The traditional sizing systems are based on a measurement of the outside diameter of a tire. A larger rim goes with a skinnier tire, and vice versa. If the bicycle has hub brakes (drum, disk, coaster), different rim sizes are possible as long as the tire is fits the frame. Nominal tire width is marked on the tire actual width can be measured if the tire is installed on a rim. Measure at the radius of the widest part of the tire, usually the rim radius plus half the tire width -except that the widest part may be at the tread of an off-road tire. The space between the fork blades or stays must be wide enough to clear the tire, with a few mm extra on each side in case the wheel goes slightly out of true. On a bicycle with horizontal dropouts, additional clearance to the chainstay bridge is desirable so the wheel can be removed without deflating the tire. A tire must have typically 1 cm clearance, 2 cm if a fender will be installed, but do not use a wheel that is much smaller, or a pedal is too likely to strike the ground in cornering. Tire outside radius is nominally the rim radius plus the tire width, and as much as 1 cm greater for a tire with a deep tread. Take measurements from the axle position to the fork crown, chainstay bridge and seatstay bridge. The front tire must not reach the fork crown the rear tire must not reach the seatstay bridge or chainstay bridge. A different rim size may be possible with different brakes, though longer brake reach generally results in poorer brake performance. Then look up the rim radius in the ISO table on this page. So, first measure the distance from where the center of the hub axle would be in a dropout to the center of a brake shoe. If the bicycle has rim brakes, the rim must line up with the brake shoes and so only one rim size or a small range of sizes will work. In conclusion 110mm wheels are a better option for most scenarios, but the 100mm and 120mm wheels have some fantastic advantages if that is what you need.To determine which tire size will fit, perform measurements on the bicycle's fork and frame. Video Breakdown Of Wheel Sizes By Logan Schnider Less product offerings from most brands.Longer lifespan due to more poly urethane.Park riders that prefer to go as fast as possible and sacrifice a little bit control often use 120mm. They are popular amongst street riders as the larger size gives them a smoother ride over the rough surfaces you would typically find at many street spots. larger product offerings in this size across most brandsġ20mm pro scooter wheels are the second most common size wheel you will find at most scooter shops.Greatest level of control of all the wheel diameter sizes.More longevity due to higher poly urethane content.They offer the most advantages for most riders across all styles and disciplines. Although it is listed as a disadvantage, the slower speeds of a 100mm wheel can be considered a good thing for newer riders as they are trying to focus on feeling comfortable with new tricks, body movements, and balance.ġ10mm wheels are the most common pro scooter wheels on the market. ![]() They are best for smaller kids that don't require the extra clearance or speed advantages of the larger sizes. At first glance the difference between 100mm, 110mm, & 120mm does not seem like much but you can ask any serious scooter rider that each step up in size feels drastically different and each have their pros and cons.ġ10mm Wheels are the most common wheels you will find on beginner trick scooters. The wheel's diameter and width can both range quite a bit. In this article we will help you decide which wheel diameter is best for you. The Differences In Pro Scooter Wheel Sizes ![]()
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