The tire size will also indicate what size rim strip and motorcycle inner tube is needed. Get free shipping, 4% cashback and 10% off select brands with a Gold Club membership, plus free everyday tech support on aftermarket 16" 120 80-aspect-ratio Motorcycle Tires & motorcycle parts.. Press J to jump to the feed. Secondly, it effectively lengthens your gearing, giving you more top end over acceleration, by a significant amount. The width codes below are for motorcycle tires with an aspect ratio of 80 or greater. The smaller the number the lower profile of the tire. Rim Widths British motorcycle rims (Triumph, BSA, Norton etc.) This is why ALL tire manufacturer will have a recommended rim width for any given tire size and varies between manufacturers due to tire construction an/or design and/or compound. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. My Nissan Xterra OEM is a 255/65/16. are marked with a letter and number designation. Peakier profile, whether in fitting a wider tire or going with a taller aspect ratio, basically does 3 things. Aspect ratios are also referred to by series. Thus, this tire has a side wall height of 90 percent times 130 mm or 117 mm. Todd Muller is known for his experience and knowledge of motorcycle mechanics. It's just expressed in a different way. The interesting thing about the A/R is that no matter the diameter of the wheel on which it's mounted, nor how wide the tire is, this ratio never deviates from its intended description. This is a ratio of section height height to section width. Online shopping for Automotive from a great selection of Motorcycle, Scooter & more at everyday low prices. We recommend against buying used tires; you don’t know how many heat cycles they’ve gone through. To most people, the numbers and letters on the side of their tires are cryptic and indecipherable. Section Width: In this case it is 185. The sidewall height is a percentage of the width of the tire. 2-wheel enthusiasts who can agree on nothing except for entry level SV650s and lane splitting. Shop the best 90-aspect-ratio 120 Metzeler Motorcycle Tires for your motorcycle at J&P Cycles. The aspect ratio is a percentage of the section width. Automobile Tire Wheel Size Comparison and Conversion Calculator Metric Standard - Car Truck SUV Motorcycle. Parameters include width, circumference, aspect ratio, diameter, radius, wheel diameter, speed and sidewall height of metric and standard tires. All of the pricing for mounting and balancing is based on the tire's aspect ratio, which is the middle number of the tire size. The lower profile tire will cause the motorcycle to steer slower because the front end trail will be increased. Today, racing tire aspect ratios have gone as low as 0.25. First off, while a tire may have a certain designation, its not always accurate - different brands can have different size tires. Aspect ratio of a tyre in layman’s term is denoted by a percentage (nos.) Browse our extensive inventory now. This also means that when you buy a used motorcycle… New comments cannot be posted and votes cannot be cast, More posts from the motorcycles community. Aspect ratio is simply identified as a percentage of the section height divided by the section width. The second number indicates the aspect ratio (or height) of the tyre. Inner tubes are common, though tires are also run without tubes on many modern motorcycles with mag wheels. First, it gives you better cornering by making the bike fall more into the turn and giving you more edge grip when leaned over. In metric this is a ratio between height and width. Surely you're not thinking about fitting low profile tires to lower your Street Bob? This is represented as a percentage of the width of the tyre. Way back when … motorcycle tires didn't get much larger than an MV85 which is … Also, because we have all of our tires in stock, we are able to offer the industry's best motorcycle tire shipping. The smaller the number the lower profile of the tire. A 180/70B16 is 180mm wide and 126mm high. ex. Aspect ratio (90%) Tire width code Motorcycle code Speed rating Load rating Rim diameter (inches) Aspect ratio (90%) Selection width (mm) Load Rating - A numerical code which corresponds to the total load carrying capacity at the speed indicated by the speed symbol. Can I use a tire with slightly different aspect ratio than OEM? If your dimension is in inches, multiply by 25.4 . Those low-profile 190-series tires sure look gnarly on the back of a sportbike, and we've seen them pinched onto all sizes of rims. Typical Tire Markings A- Tire width B- Aspect Ratio. For example, if you have a tire that is 110/80R-18, the aspect ratio is 80% of the tread width (the first number in the tire size), creating an 88-millimeter sidewall height. Can you give some info on your second point? Other than sitting a bit lower, what other considerations are there will a lower profile? The second number is the aspect ratio. The second number on a metric tire is to calculate the side wall measurement. Specifically I'm curious how tire profile affects gearing. But if you had a slightly wider rear wheel like a 130/80-16, then the rear would be 104mm high. Therefore, you would look at the pricing line for "50-55 Series" tires. Find the quality tires you want at ChapMoto.com. Purchase price of excluded items is applied toward free shipping level of $79.95. Shop the best 16" 120 80-aspect-ratio Motorcycle Tires for your motorcycle at J&P Cycles. This second number is that percent. Online shopping for Automotive from a great selection of Motorcycle, Scooter & more at everyday low prices. Tires made specifically for motorcycles are coded with an M. The tire Width Code is just a letter to substitute for the width of the rim. Motorcycle Tire Guide 4 their usable tread life. The first number is the width of the tire in millimeters, measured from sidewall to sidewall. I understand the aspect ratio is the height of the tire in relationship to its width. And if your order is over $99., take advantage of our FREE shipping. Get free shipping, 4% cashback and 10% off select brands with a Gold Club membership, plus free everyday tech support on aftermarket 90-aspect-ratio 120 Metzeler Motorcycle Tires & motorcycle parts.. Can I Use a 255/70/16 as a replacement? (For those curious, the “M” indicates “Motorcycle.” Every alphanumeric tire you’ll run into will start with an “M.”) The 90 represents the aspect ratio. This chart shows the approximate comparison of the different size indicators. Does it significantly affect handling? So, for example, a 120/80-16 rear and a 100/80-16 front means the rear tyre is 96mm high and the front is 80mm high? M means the tire is for motorcycle use, T is the tire width code, 90 is the aspect ratio and 17 is the rim diameter. What about longevity? Inner tubes are common, though tires are also run without tubes on many modern motorcycles with mag wheels. Aspect Ratio: In this case it is .60. Free shipping available to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses only. I understand the aspect ratio is the height of the tire in relationship to its width. ex. E-Gift Cards are excempt from discounts. Tire Sizes Size may be indicated in inches, metric, or by letters (alpha). Common Tire Sizes The following chart shows some common tire sizes, including their width and the diameter. For example, a 205-65-15 tire has a 205mm tread width and fits on a 15-inch rim. Very handy when choosing which tire will fit your bike, or which motorcycle rear fender to buy to fit the tire you want to run on your new build! Press question mark to learn the rest of the keyboard shortcuts, NY 14Grom,06CBR600RR,05SV650S(Race),01GZ250 Sidecar. Shop tires, as well as motorcycle parts and price out your motorcycle tire, set fast. Secondly, when you have a certain size rim (for example, 5 inch rim is designed for a 160 tire), going with a bigger width will squeeze the tire and make it more peaky. The aspect ratio is the height of the sidewall expressed as a percentage of the width. Motorcycle Street Tire Size Conversion Chart: Front Tires: Rear Tires: Metric: Alpha: Inch: Metric: Alpha: Inch: 80/90: MH: 2.50/2.75: 110/90: MP85: 4.50/4.75: 90/90: MJ90: 2.75/3.00: 120/90: MR90: 4.50/4.75: 100/90: MM90: 3.25/3.50: 130/80 : 5.00/5.10: 110/90: MN90: 3.75/4.00: 130/90: MT90: 5.00/5.10: 120/80 : 4.25/4.50: 140/80 : 5.50/6.00: 120/90: MR90: 4.25/4.50: 140/90: MU90: 5.50/6.00: … The weather is always a little unpredictable, so we think it’s essential to talk about how your motorcycle tires perform in the rain. Sporting riders want their motorcycles to turn in as quickly as possible on winding roads and will actually raise the rear ride height (if they have a ride height adjuster screw) to make their rear end higher for quicker turn ins. If your tire size is 205/55R16, your aspect ratio is 55. Aspect Ratio: The aspect ratio is the height of the sidewall in relation to the width of the tread. A 180/70B16 is 180mm wide and 126mm high. Tire aspect ratio is defined as tire section height divided by section width (figure 1). The alpha numeric method of tire sizing is older than the metric system. JUST GREAT STUFF. It is helpful to know how these compare with each other so you can compare different brands of tires and see which might be the best fit for your bike. For example, a 0.50 aspect ratio tire (such as a P265/ 50VR15) is said to be 50-series. Todd's home garage is full of many different bikes, stock, as well as choppers and bobbers, in addition to engines and other good stuff he has stashed. His specialties include Triumph and Harley-Davidsons, and he has helped thousands of people around the world with everything from how to wire their custom bike to rebuilding an engine. A code of U means this tire will fit on a rim that is between 2.75 and 3.50 inches wide. The difference between the two tires you mention is somewhere to this difference: 217/45R17 = 24.6" overall diameter = 77.3" circumference 217/65R17 = 28.0" overall diameter = 87.9" circumference Rim strips are rubber strips that go around the rim, covering the inside edges of the spokes, before the tire is mounted. You can see Todd in many of Lowbrow Customs' YouTube videos where he walks the viewer through all sorts of motorcycle maintenance and service tasks. A 170/80 means the width is 170mm, and the height would be 80% of that. ) You'll definitely notice a change in the handling if you fit a tire with a lower profile in place of the OEM tire. Had a slightly wider rear Wheel like a 130/80-16, then the rear would be 80 of. Install: Custom Le Pera Seat on a Harley-Davidson Sportster → overall width and motorcycle inner tube from a selection! Fit on a 15-inch rim for Automotive from a potential puncture from continual wear against the spokes in this then. 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