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. This guide will help you understand the codes on the side of your motorcycle tires to be sure you know which tires you are currently using, and which others will fit your motorcycle. Tire Sizes Size may be indicated in inches, metric, or by letters (alpha). When you buy a tire, there are three keys to its size: tread width, rim size and aspect ratio. It will to a degree, but you might not even notice it. This is represented as a percentage of the width of the tyre. First, it gives you better cornering by making the bike fall more into the turn and giving you more edge grip when leaned over. The second number is the aspect ratio. 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. 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. 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. Shop ChapMoto.com…Your Motorcycle Tire Superstore! Find the quality tires you want at ChapMoto.com. Rim strips are rubber strips that go around the rim, covering the inside edges of the spokes, before the tire is mounted. Specifically I'm curious how tire profile affects gearing. A tire has a Series Size System when the aspect ratio is unspecified, so it will always be 82% unless it is specifically noted to have an 85% aspect ratio. The drawing of the tire tread and its negative ratio … Typical Tire Markings A- Tire width B- Aspect Ratio. 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. Automobile Tire Wheel Size Comparison and Conversion Calculator Metric Standard - Car Truck SUV Motorcycle. The smaller the number the lower profile of the tire. Can I Use a 255/70/16 as a replacement? A 182/65B26 is 18mm wide and 117 high so the bike’s going to sit a little lower – roughly ½”. But if you had a slightly wider rear wheel like a 130/80-16, then the rear would be 104mm high. A 180/70B16 is 180mm wide and 126mm high. ex. We have over 2000 motorcycle tires and dirt bike tires in stock, but with our Tire Finder, you will be able to find just what you need in no time at all. Looking for some input on tire size and selection, specifically the aspect ratio. So as long as you are within their recommended range you are golden. You'll notice the tables do not go any further than 150/90 tyre sizes. The sidewall or aspect ratio are used in metric tire sizes to determine the overall height of a tire. Online shopping for Automotive from a great selection of Motorcycle, Scooter & more at everyday low prices. Surely you're not thinking about fitting low profile tires to lower your Street Bob? 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. Looking for some input on tire size and selection, specifically the aspect ratio. Peakier profile, whether in fitting a wider tire or going with a taller aspect ratio, basically does 3 things. Thirdly, it causes the rear ride height to be taller, which decreases your trail, making your bike easier to dip in corners but also making it less stable when you are fully leaned over. First of all, take a look at the graphic below. 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. In this example, how would the handling dynamics of the bike change. 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 Motorcycle Tire Guide 4 their usable tread life. Browse our extensive inventory now. The aspect ratio is a percentage of the section width. The following brands are exempt from additional discounts to the selling price: Drag Specialties, Biltwell, Motorcycle Tires: Understanding Tire Sizes and Codes, VIDEO: How to Install a 21" Lowbrow Customs Ribbed Spool Hub Wheel on a Sportster, Video: How to Install - Lowbrow Customs 21" Spool Hub Wheel Onto a Mid-USA Springer Using Pre-made Spacers, VIDEO: How To Install Extended Fork Tubes On Your Harley-Davidson Motorcycle, Panhead Jim Builds A Sportster Chopper - Part 3, VIDEO: How To: Harley Shovelhead Clutch Cable Replace, Install and Adjustment, Cloth Covered Wire - 16 gauge - sold by the foot - Assorted Colors Available, Weld-On Upper Fender Mount Tab for Curved and Ribbed Motorcycle Fenders, Throttle Tube - 1 inch - Dual Cable - Black. Other than sitting a bit lower, what other considerations are there will a lower profile? Free shipping available to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses only. Z. 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. A 170/80 means the width is 170mm, and the height would be 80% of that. ) If your tire size is 205/55R16, your aspect ratio is 55. 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. Typical Tire Markings A- Tire width B- Aspect Ratio. Not necessarily better cornering, but different cornering. It's just expressed in a different way. The smaller the number the lower profile of the tire. Can you give some info on your second point? And if your order is over $99., take advantage of our FREE shipping. Consult your motorcycle service professional or tire manufacturer for guidelines. Convert and compare different tire sizes. Common Tire Sizes The following chart shows some common tire sizes, including their width and the diameter. Tyre aspect ratio explained The side wall code lets you know the tyre specs such as width, load index, diameter, speed rating and profile of a particular tyre. Tire aspect ratio is defined as tire section height divided by section width (figure 1). This chart shows the approximate comparison of the different size indicators. 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. The aspect ratio is the height of the sidewall expressed as a percentage of the width. Most rideitors will assume you're talking about doing this to a sportbike. This is helpful to know what tires you can mount on your rim based on the manufacturer's specs. E-Gift Cards are excempt from discounts. A 182/65B26 is 18mm wide and 117 high so the bike’s going to sit a little lower – roughly ½”. First off, while a tire may have a certain designation, its not always accurate - different brands can have different size tires. This is the first of two speed ratings found in the code. We have the best motorcycle tires prices online. In this example then, the height of the tyre is 55% of 180mm, which equates to 99mm. For example, a 0.50 aspect ratio tire (such as a P265/ 50VR15) is said to be 50-series. *Excludes frames, hardtails and specified oversize items. The tire size will also indicate what size rim strip and motorcycle inner tube is needed. Does it significantly affect handling? Aspect Ratio: In this case it is .60. To most people, the numbers and letters on the side of their tires are cryptic and indecipherable. Aspect ratio is simply identified as a percentage of the section height divided by the section width. Press J to jump to the feed. If you already have a bike that likes corners, a peakier profile might make it feel twitchy and nervous. This second number is that percent. Changing the height of the tire profile alters the geometry of the chassis like swingarm angles and, rake and trail. 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? Shop the best 16" 120 80-aspect-ratio Motorcycle Tires for your motorcycle at J&P Cycles. Thanks. Also, because we have all of our tires in stock, we are able to offer the industry's best motorcycle tire shipping. It indicates what speed the tyre is capable of being taken over. NO SPAM, EVER. Any additional items purchased ship free. Shop the best 90-aspect-ratio 120 Metzeler Motorcycle Tires for your motorcycle at J&P Cycles. New comments cannot be posted and votes cannot be cast, More posts from the motorcycles community. E-Gift Card purchase price does not count toward your total for free shipping. Aspect Ratio: The aspect ratio is the height of the sidewall in relation to the width of the tread. Motorcycle Tyre Aspect Ratio Calculator Uncategorized February 12, 2019 0 masuzi Motorcycle tyre size designations ride on tire protection motorcycle tire sizes explained tire chart conversion 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! The second number on a metric tire is to calculate the side wall measurement. You'll definitely notice a change in the handling if you fit a tire with a lower profile in place of the OEM tire. The first number is the width of the tire in millimeters, measured from sidewall to sidewall. They help protect the inner tube from a potential puncture from continual wear against the spokes. Tire Size Conversion Charts. Way back when … motorcycle tires didn't get much larger than an MV85 which is … The alpha numeric method of tire sizing is older than the metric system. Therefore, you would look at the pricing line for "50-55 Series" tires. 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.. Motorcycle Tyre Aspect Ratio Explained Uncategorized June 2, 2020 0 masuzi Motorcycle tire size meaning explained motorcycle tire sizes explained motorcycle tyre size designations tire information Press question mark to learn the rest of the keyboard shortcuts, NY 14Grom,06CBR600RR,05SV650S(Race),01GZ250 Sidecar. The width codes below are for motorcycle tires with an aspect ratio of 80 or greater. 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. Heat is the biggest killer of automatic transmissions. A 180/70B16 is 180mm wide and 126mm high. The lower profile tire will cause the motorcycle to steer slower because the front end trail will be increased. S=112mph, H=130mph, V=149mph, W=168mph) F- Tubeless (TL) or Tube Type (TT) tire. If you are looking at the cross section of a tire, it had certain designed profile to it which would yield the best performance and/or efficiency and/or longevity of the tire. If your dimension is in inches, multiply by 25.4 . Aspect ratio of a tyre in layman’s term is denoted by a percentage (nos.) The sidewall height or "aspect ratio" of a 285/75/R16 tire is 75% of 285mm. Secondly, it effectively lengthens your gearing, giving you more top end over acceleration, by a significant amount. Today, racing tire aspect ratios have gone as low as 0.25. Aspect ratios are also referred to by series. JUST GREAT STUFF. 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. Can I use a tire with slightly different aspect ratio than OEM? EMAILS ARE NEVER SHARED. Purchase price of excluded items is applied toward free shipping level of $79.95. Online shopping for Automotive from a great selection of Motorcycle, Scooter & more at everyday low prices. The grooves circled show the fundamental component of a tire’s performance. I understand the aspect ratio is the height of the tire in relationship to its width. Thus, this tire has a side wall height of 90 percent times 130 mm or 117 mm. **Only one coupon code or discount can be used per order. Rim Widths British motorcycle rims (Triumph, BSA, Norton etc.) In metric this is a ratio between height and width. 2-wheel enthusiasts who can agree on nothing except for entry level SV650s and lane splitting. In metric this is a ratio between height and 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 two-digit number following the section width identifies the tire’s aspect ratio. My Nissan Xterra OEM is a 255/65/16. What about longevity? ← How to Install: Lowbrow Customs Rogue Fender, How To Install: Custom Le Pera Seat on a Harley-Davidson Sportster →. Section Width: In this case it is 185. The weather is always a little unpredictable, so we think it’s essential to talk about how your motorcycle tires perform in the rain. So if you have a 70-series tire , that means the sidewall height is 70 percent of the tire's overall width. 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.. are marked with a letter and number designation. Inner tubes are common, though tires are also run without tubes on many modern motorcycles with mag wheels. For example, a 205-65-15 tire has a 205mm tread width and fits on a 15-inch rim. In the example below, the aspect ratio of the tire is 70 percent, so the section height of tire will be 129.5mm. I understand the aspect ratio is the height of the tire in relationship to its width. ex. C- Rim diameter D- Load capacity E- Tire speed rating (ex. Motorcycle Tire Speed Ratings, Load Ratings and Tire Size Designations Front Tire Size Conversions Rear Tire Size Conversions Metric Alpha Inch Metric Alpha Inch 80/90 MH90 2.50/2.75 110/90 MP85 4.00/4.75 90/90 MJ90 2.75/3.00 120/90 MR90 4.50/4.75 100/90 MM90 3.25/3.50 130/80 5.00/5.10 120/80 4.25/4.50 140/80 5.50/6.00 120/90 MR90 4.25/4.50 140/90 MU90 5.50/6.00 130/90 MT90 … We recommend against buying used tires; you don’t know how many heat cycles they’ve gone through. Inner tubes are common, though tires are also run without tubes on many modern motorcycles with mag wheels. A certain design profile is critical in maintain the appropriate contact patch at all angles from straight to max lean. Here's why. Aspect ratio for most bias ply tires is somewhere around 80 or 90 percent. (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. Shop tires, as well as motorcycle parts and price out your motorcycle tire, set fast. Parameters include width, circumference, aspect ratio, diameter, radius, wheel diameter, speed and sidewall height of metric and standard tires. X100 Alphabetical Designations The aspect ratio is the height of the tyres' sidewall, given as a percentage of the width of the tyre. 0 Comments. This also means that when you buy a used motorcycle… A code of U means this tire will fit on a rim that is between 2.75 and 3.50 inches wide. C- Rim diameter D- Load capacity E- Tire … Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. 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. The second number indicates the aspect ratio (or height) of the tyre. Todd Muller is known for his experience and knowledge of motorcycle mechanics. 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