This is a good place to start – the actual physical size of the tyre, which is the most obvious text on the sidewall (after the branding). The above tyre marking is for a bias motorcycle tyre - we know this thanks to the dash (“-”) seen between the profile and diameter of the tyre. (ex. The tyre will be marked on the outside to tell you if it’s a tube-type or tubeless. DOT mark (10) Firms work hard on the graphic design of the logo and the like too, to make the sidewall as pretty as they can. M/C obviously stands for motorcycle. Load index (6) Here’s our quick-yet-comprehensive guide to what it all means. Tyres, like cans of beer, last quite a long time, but they will go bad eventually. I would guess this is because the last pair worked perfectly fine, so why would they need to know? There are three parts to this – the width of the tyre in millimetres, and the ‘aspect ratio’, which is basically how tall the tyre is, as a percentage of the width, plus the diameter of the wheel the tyre fits (in inches, curiously). Alpha Coding. LIKE any trade, the tyre business has its own jargon. Were this tire a radial, we would see a … That’s everything in the code explained, but what do the different sizes and profiles of tyre do for you as a rider? If you already know your motorbike’s tyre size reference, find out all Michelin motorcycle’s tyres sizes available by clicking on the rim size. APEX. In this case it’s a 17-inch wheel. It’s even easier than that: by law, tyres have to carry a load of detailed information stamped onto the side of them, about size, speed and weight ratings, and much more. Another benefit of a pointy tyre is that it will give you a greater contact patch when leaned over and on the edge of the tyre, promoting higher lean angles and faster cornering speeds. The speed rating is a single capital letter next to the size – so our typical front tyre might be a 120/70 17 Z – which is suitable for over 150mph. Apex shape and material play an important role in the way a tyre … So a 120/70 16 ZR is a radial with a Z speed rating. Country of Construction (12) Thus, this tire has a side wall height of 90 percent times 130 mm or 117 mm. M/C. Only you can really decide which size and profile of tyre is best. And why not?!?! This ratio is not indicated when section width is expressed in inches (eg. A typical front tyre size is 120/70 17, a common rear is 180/55 17. Give us a shout here on 0207 205 2205. The “17″ denotes that the tyre is 17 inches in diameter whilst “M/C” means the tyre is for a motorcycle. The number portion of the characters in brackets represent the load index of the tyre, which specifies the maximum load the tyre can carry. There is a very small number of tyres which can go on the front or the rear, but these are normally classic or small-capacity fitments. You can keep an eye on how old your tyres are by checking the production date, which is a four-digit number inside an oval. Once completed we give you the best recommendations for tyres. Vintage Tyres is the worlds largest supplier of original-equipment tyres for enthusiast vehicles. WHAT ARE THE DIFFERENT COMPONENTS WHICH MAKEUP YOUR TYRE? When buying motorcycle tyre, the bike owners should check the five-part size number of the tyre, comprising of the width, speed rating, aspect ratio, tyre construction and rim diameter. On the sidewall of any tire, you will see a string of numbers. That’s a simple one! Do you like the slower more stable feeling of a wider, less pointy tyre? Here’s a list of the speed ratings: J 62mph MOTORCYCLE TYRE MARKINGS: THE WRITING’S ON THE WALL!! The downside to a pointy tyre is that it will feel more unstable going in a straight line and almost twitchy. Easy. In this case the tyre will fit a 17 inch diameter wheel. Or do you like the bike to fall into the corner more, and you aren’t worried too much about little wiggles on the straights? Type – radial or crossply (3) Sunday and Bank Holidays: Closed. 3 Code for tire construction (- = Bias, R = Radial, B = Bias Belted). Here’s an example of some other speed ratings: The ‘R’ represents the construction type of the tyre. And if you can decode the lingo, you’ll be in a much better position to work out what you need. Old-school wire-spoked rims need inner tubes, like a bicycle, because the wire spokes aren’t sealed where they join the outer rim, and air would leak out here. Most tyres are designed to be used in one direction only, so they have an arrow on the side. Speed rating (7) The question is what do those numbers actually mean? Assuming of course the bigger tyre fits your smaller capacity bike. Tyres must not be used on damaged or distorted wheels since this could result in tyre damage and deflation. So, like cans of beer, it’s best to use them as quickly as you can – then buy some fresh ones! Car tyre sizes explained. M 81mph Available from £21.6 to £214.8. Note, "xxx" is tread width in mm. So if you are looking at a rear-wheel for a dirt bike, you might see: 120/100-18 These numbers represent (Left to right): (THIS CHART DOES NOT IMPLY EXACT COMPARISONS) TYRE CONVERSION CHART This helps you choose your tyre thread pattern and ply. Example of Tire Size Specifications 4) LOAD INDEX & SPEED RATING The ‘58W’ indicates the load and speed indexes of the tyre and should always be looked at together when you buy a new tyre. Terms of Service, Disclaimer & Privacy Policy. MOTORCYCLE TYRE MARKINGS: THE WRITING’S ON THE WALL!! 3.50-18). Motorcycle-standard tyres found at Vintage Tyres. However, some manufacturers such as Bridgestone and Dunlop are known to be more pointy than other brands like Metzeler and Pirelli. Rotation arrow (9) 17. U 125mph It’s literally a rolling advert for the maker, so they stamp the model and their name as big as possible on there. How Much Lean Angle Should We Use When Cornering? There are two organizations, Tire and Rim Association (TRA), and European Tyre and Rim Technical Organisation (ETRTO), that influence tire standards. This is represented as a percentage of the width of the tyre. As hinted to above, the pointier the tyre, the quicker it is going to feel like it wants to turn in. The general rule of thumb is that the wider the tyre, the wider your footprint on the road – for the most part. Q 100mph • As ever – we’re ready and waiting to help you with any queries at all! L 75mph I hope this has armed you with a little more knowledge on the differences in motorcycle tyres so you can now more confidently make the decision on what type of tyre you want to go for next. This next number represents the size of wheel that the tyre fits measured in inches. It has to be said though that many of the differences in feel that these tyres will give you are small and would take a fairly skilled rider to notice them, and an even more skilled rider to make best use of those differences, so try not to get too hung up on them and just go with what you feel is right for you. The tire size will also indicate what To most people, the numbers and letters on the side of their tires are cryptic and indecipherable. So that typical 120/70 17 front tyre is 120mm wide (1), 70 per cent (2) of 120mm (around 84mm) tall, and fits onto a 17-inch rim (4). The size and profile of the tyre you opt for should be down to how you like to ride and what you want from the tyre. When you see ‘R’ on a tyre it means it has a radial construction. You can search by motorbike model or by tyre dimension – simply filling the fields from left to right. So in this case, if you load the tyre to 365kg then the speed rating of the tyre becomes 168mph as per the above speed index. Bridgestone Corporation is the world's largest tire and rubber company. However it doesn’t tell us the maximum tolerable speed for the tyre; that comes later in the code in brackets. The next item you’ll see is the rim size expressed in inches. This simply means that the tyre is suitable for motorcycle use. 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. The “17” denotes that the tyre is 17 inches in diameter whilst “M/C” means the tyre is for a motorcycle. R 105mph The forces going through a tyre get very serious as speeds increase, so they have a maximum speed rating. If it has neither of these letters, it will be a bias-ply tyre. In addition to tires, Bridgestone manufactures diversified products, which include industrial … Tire sizes are defined by specifications such as the type, width, aspect ratio, speed rating, tire construction type, and service description. The “ (58W)” indicates the load and speed indexes of the tyre. There are three major systems and each has a different format, which is why it is important to have the motorcycle tire size meaning explained, so you can learn – in order to buy the right tire for your bike. Motorcycle Tire Sizing Explained Uncategorized June 2, 2020 0 masuzi Motorcycle tire sizes explained motorcycle tire size meaning explained motorcycle tire sizes explained motorcycle tire … The choice here depends on your wheels. The answer is they don’t really, but the size and profile of a tyre can actually alter the way your motorcycle rides and handles, and some riders might actually benefit from a little change up. These numbers are a metric designation that indicates the size of the tire and the rim that tyre is designed to go on. These are the two main types of internal tyre construction: radial tyres have bands of strengthening cords arranged radially from one edge of the tyre rim straight across the tread to the other, so they sit at 90 degrees to the direction of travel. That’s your motorcycle tyre sizes and profiles explained. In this case the “58” denotes that the tyre is rated fora maximum weight of 236kg at maximum pressure, whereas the … 17. Do tyre sizes confuse you? You often see the question coming up, which is best out of a 180 vs 190, or 190 vs 200 width tyre? If it has neither of these letters, it will be a bias-ply tyre. Generally it is the width and height of a tyre (e.g. "yy" is "aspect ratio" (sidewall height to tread width). No, we’re not talking about the owner’s manual under the seat (though that does have some good info in there). 5 "Motorcycle" in 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 … The second number indicates the aspect ratio (or height) of the tyre. This is pretty simple: don’t use a front tyre on the back wheel or vice versa. This simply means that the tyre is suitable for motorcycle use. Many would agree that a 190+ width tyre is only really worthwhile on 1000cc bikes and up, but again there is no right or wrong answer as it is mainly down to personal preference. There are a lot of dirt bike tire sizes available to motocross and off-road riders. In this example then, the height of the tyre is 55% of 180mm, which equates to 99mm. P 95mph This chart gives a guide to the relationship between various size markings. In this case the tyre will fit a 17 inch diameter wheel. W 168mph The ‘W’ in brackets is the second speed rating found on the tyre. If you’re ever thinking of going up to a 190 on a smaller bike such as a 600 or 750, please know that many 190+ width tyres are designed for 6 inch wide rims, where as many smaller bikes have 5.5 inch rims. How to Get the Most from Your Track Time: Pre-Ride Prep & How to Approach Your Day, How to Deal With the Panic When Someone Takes Your Line, Learning to Trust Your Tyres Through Technique & Experience, Using Other Riders to Gauge Your Speed and Uncover Weaknesses, How to Tackle Hairpin Corners on the Track, Body Position: What the Bike Wants From You As a Rider. In this example ‘Z’ means that the tyre is suitable for speeds over 149mph. Date code (10) 25x8-12 tires are designed to mount on a 12" rim) Choosing the right size of tyre for your Quad. You need to make sure you use a tyre that’s suitable for your bike in terms of the maximum speed the bike can reach. Understand these numbers, letters and symbols, and you’ll be well on the way to being a tyre genius. Here’s a primer on how to decipher which tire size … This has resulted in various size markings. Radial tyres have a letter ‘R’ after the speed rating. SIZING (1,2 and 4 on our pic) Low-Profile Equivalent. Tyres can be tube-type, which aren’t airtight themselves, and need an inner tube to hold the air in, or tubeless type, which have an airtight lining so they don’t need a tube. Please leave a message outside of these hours. 12354421 and VAT No. You’re not alone – the average person doesn’t know what size tyres are fitted to their vehicle. Crossply tyres generally have taller sidewalls and are more suited to older bikes, commuter and off-road machines. Motorcycle Tire Size Meaning Explained Metric System. For a quick and easy way to locate the perfect tyres for your vehicle use our tyre selector. The answer is neither is ‘best’, just that each is going to give you a slightly different feel. If you see ‘TT’ then it is a tubetype tyre, so it must have an inner-tube. Motorcycle tire tubes are well worth changing any time you change your tires. How Dirt Bike Tire Sizes Work: Breaking Down Numbers. Give us a shout if you have any queries on Load Index. H 130mph 3.10. Share Tweet. T 118mph Before we look at what different motorcycle tyre sizes can do, lets first take a look at what all those numbers and letters mean on the side of the tyre. Luckily, most of it is quite logical and scientific, and much of what you need is actually written down – on your bike, outside, right now! It is essential that the wheel size and type is a suitable fitment for the tyre and motorcycle concerned (table). GB343789562. If it has neither of these letters, it will be a bias-ply tyre. The apex is used to reinforce the sidewall and sits on top of the bead. Tire identification diagram Tire diameter (inches) = (xxx*yy/1270)+zz, where tire size is commonly written "Pxxx/yyRzz" on the sidewall. This next number represents the size of wheel that the tyre fits measured in inches. Here’s a brief explanation of radial tyres and the other most common construction type: Radial – A tyre that has its cord plies arranged perpendicular (at a 90 degree angle) to the direction of travel. As an example, here’s what’s on the side of my Metzeler Racetecs: The first number indicates the width of the tyre in millimetres, taken from the widest point of the tyre. Saturday: Closed during lockdown TL means it is a tubeless tyre. Motorcycle tyre marking and size. 180/55) that determines its profile. As you can see, the number 73 means the tyre can carry a load up to 365kg. Remember the weight allowed is per tyre. This is the first of two speed ratings found in the code. S 113mph See size chart below. Let’s take a typical dirt bike tire size and break the numbers down, one by one. It indicates what speed the tyre is capable of being taken over. This system measures the size in millimeters. The aspect ratio is the height of the sidewall expressed as a percentage of the width. Motorcycle Tire Sizes Explained Dennis Kirk Motorcycle Conversion Chart Standard Tire Size Calculator Compare Tires Online ... Motorcycle tire chart size conversion tires comparison chart here is another that may be easier motorcycle tire sizes chart tyre size tires image result for motorcycle tire … If this, instead, said B or R, this would indicate a bias-belted or radial tyre, respectively. "zz" is wheel diameter (inches). Z Over 150mph. MOTORCYCLE TYRE PARTS EXPLAINED. MH90. E marking (10) This next number represents the size of wheel that the tyre fits measured in inches. No matter how cool your matt black retro Bobber Brat Scrambler Rat creation looks with a 200-section rear tyre squashed onto the front. To find what weight this number corresponds to you will need to refer to a load index table. LIKE any trade, the tyre business has its own jargon. Brand/model/logo marks (11) It is the most commonly used system for motorcycle tires, which is a set of three numbers and letters … DOT stands for the US Department of Transport, and the DOT mark shows that the tyre is road legal and has passed statutory homologation testing for safety. 2 Ratio between tire section height and nominal section width. Getting this wrong is an MOT fail, and can be dangerous, so do check when you buy a bike or get tyres fitted. The ISO Metric tire code consists of a string of letters and numbers, as follows: Tubeless/tube-type (8) This is our local website to search for and find the right tyres for your vehicle. Once you have selected the right tyre size, you will find all … Put simply, the load you put on a tyre has an effect on its maximum capable speed. For the most part, when the time comes for a rider to put some new road or track tyres on their machine there is little thought into what the size and shape of the tyre actually does for them. This improves performance over non-belted, bias-ply tyres (also called cross-ply). The load index is a two-digit number, but the permitted weight is also marked on the tyre. Monday to Friday: 8:30am to 5:00pm (ex. Regardless of which manufacturer made the tyre, its size is indicated on the tyre … V 149mph Motorcycle Tyre Sizes Explained. These numbers sit in the same order on most dirt bike tires. There can sometimes be extra letters after this. We explain everything you need to know here: Where can I find my vehicle’s tyre size? Not all the of characters determine the size of the tyre, but even so I think it’s worth a little lesson in what they all mean. Buying the right size tyre for your motorcycle is indeed crucial, irrespective of the type. So tube-type rims need to be used with an inner tube – but you can use either a tube-type or tubeless tyre. Deciphering motorcycle tyre codes. Making Sense of Motorcycle Tire Sizes The most obvious piece of information is the big numbers and letters that usually look like this – 130/90 17, or MT90 17. And if you can decode the lingo, you’ll be in a much better position to work out what you need. Some modern designs have tubeless wire spoked wheels now – the spokes attach to the outer edge of the rim rather than through the centre, so the rim is air-tight. Motorcycle tyres are manufactured in a number of different countries with differing requirements in terms of load, dimensions and speed ratings. Old Sizes. Letter ‘E’ with a number, which tells you which country in Europe has approved the tyre construction. 80/90. Crossply tyres are an older technology, which uses different arrangements of ‘plies’ or material which cross over each other under the tyre tread. 4 Nominal rim diameter size in inches. The letters are then followed by the wheel rim size which is expressed in inches. 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