No, we’re not talking about the owner’s manual under the seat (though that does have some good info in there). 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. Low-Profile Equivalent. 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. Deciphering motorcycle tyre codes. MOTORCYCLE TYRE MARKINGS: THE WRITING’S ON THE WALL!! Understand these numbers, letters and symbols, and you’ll be well on the way to being a tyre genius. The complete list of motorcycle tyre sizes offers over 400 references! Monday to Friday: 8:30am to 5:00pm 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. GB343789562. When you see ‘R’ on a tyre it means it has a radial construction. MOTORCYCLE TYRE PARTS EXPLAINED. 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 … This improves performance over non-belted, bias-ply tyres (also called cross-ply). The downside to a pointy tyre is that it will feel more unstable going in a straight line and almost twitchy. The choice here depends on your wheels. R 105mph Getting this wrong is an MOT fail, and can be dangerous, so do check when you buy a bike or get tyres fitted. 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 ‘W’ is grouped with the load index (73) because this is the maximum speed of the tyre when it is at the maximum load it can carry. Tire sizes are defined by specifications such as the type, width, aspect ratio, speed rating, tire construction type, and service description. 3.50-18). Check the load you’ll be carrying, with pillion and luggage if relevant. 3.10. Firms work hard on the graphic design of the logo and the like too, to make the sidewall as pretty as they can. In addition to tires, Bridgestone manufactures diversified products, which include industrial … Here’s our quick-yet-comprehensive guide to what it all means. It indicates what speed the tyre is capable of being taken over. Easy. The forces going through a tyre get very serious as speeds increase, so they have a maximum speed rating. It is essential that the wheel size and type is a suitable fitment for the tyre and motorcycle concerned (table). 17. 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). Terms of Service, Disclaimer & Privacy Policy. The next item you’ll see is the rim size expressed in inches. So tube-type rims need to be used with an inner tube – but you can use either a tube-type or tubeless tyre. Available from £21.6 to £214.8. Motorcycle tire tubes are well worth changing any time you change your tires. 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. Motorcycle tyres are manufactured in a number of different countries with differing requirements in terms of load, dimensions and speed ratings. Regardless of which manufacturer made the tyre, its size is indicated on the tyre … Here’s a primer on how to decipher which tire size … You’re not alone – the average person doesn’t know what size tyres are fitted to their vehicle. This is pretty simple: don’t use a front tyre on the back wheel or vice versa. Remember the weight allowed is per tyre. Old Sizes. Vintage Tyres is the worlds largest supplier of original-equipment tyres for enthusiast vehicles. A consequence of the tyre being wider is that the profile won’t be as ‘pointy’ as a 180 for example, so your bike will feel like it isn’t as eager to turn in. Were this tire a radial, we would see a … The “ (58W)” indicates the load and speed indexes of the tyre. We explain everything you need to know here: Where can I find my vehicle’s tyre size? M/C. Once completed we give you the best recommendations for tyres. 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. If you see ‘TT’ then it is a tubetype tyre, so it must have an inner-tube. Put simply, the load you put on a tyre has an effect on its maximum capable speed. H 130mph Load index (6) It is the most commonly used system for motorcycle tires, which is a set of three numbers and letters … Rotation arrow (9) 17. Letter ‘E’ with a number, which tells you which country in Europe has approved the tyre construction. WHAT ARE THE DIFFERENT COMPONENTS WHICH MAKEUP YOUR TYRE? Brand/model/logo marks (11) DOT mark (10) "yy" is "aspect ratio" (sidewall height to tread width). 25x8-12 tire is 8" wide) 3rd Number = The rim diameter. Firstly you need to have a good idea what surface and what your quad will predominantly used for Sport, Farm, Road. (ex. © 2021 Two Tyres Ltd is registered in England No. In this case the tyre will fit a 17 inch diameter wheel. 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. 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. 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. In this example ‘Z’ means that the tyre is suitable for speeds over 149mph. 180/55) that determines its profile. 25x8-12 tires are designed to mount on a 12" rim) Choosing the right size of tyre for your Quad. And if you can decode the lingo, you’ll be in a much better position to work out what you need. This simply means that the tyre is suitable for motorcycle use. 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 Tyre Sizes Explained. There can sometimes be extra letters after this. 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. In this case the tyre will fit a This is our local website to search for and find the right tyres for your vehicle. 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. Do you like the slower more stable feeling of a wider, less pointy tyre? The second number indicates the aspect ratio (or height) of the tyre. The number portion of the characters in brackets represent the load index of the tyre, which specifies the maximum load the tyre can carry. 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. TL means it is a tubeless tyre. Motorcycle tyre marking and size. SIZING (1,2 and 4 on our pic) Alpha Coding. No matter how cool your matt black retro Bobber Brat Scrambler Rat creation looks with a 200-section rear tyre squashed onto the front. This system measures the size in millimeters. This next number represents the size of wheel that the tyre fits measured in inches. 2 Ratio between tire section height and nominal section width. There are a lot of dirt bike tire sizes available to motocross and off-road riders. 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. That’s your motorcycle tyre sizes and profiles explained. If it has neither of these letters, it will be a bias-ply tyre. 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. So a 120/70 16 ZR is a radial with a Z speed rating. Only you can really decide which size and profile of tyre is best. W 168mph This is the first of two speed ratings found in the code. People still fit them and get on just fine, but it’s not always recommended. In this case it’s a 17-inch wheel. A typical front tyre size is 120/70 17, a common rear is 180/55 17. I would guess this is because the last pair worked perfectly fine, so why would they need to know? If this, instead, said B or R, this would indicate a bias-belted or radial tyre, respectively. The ISO Metric tire code consists of a string of letters and numbers, as follows: 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? How Dirt Bike Tire Sizes Work: Breaking Down Numbers. Note, "xxx" is tread width in mm. 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. However it doesn’t tell us the maximum tolerable speed for the tyre; that comes later in the code in brackets. S 113mph If it has neither of these letters, it will be a bias-ply tyre. This is represented as a percentage of the width of the tyre. Tyres must not be used on damaged or distorted wheels since this could result in tyre damage and deflation. Here’s a list of the speed ratings: J 62mph 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. This simply means that the tyre is suitable for motorcycle use. MH90. Apex shape and material play an important role in the way a tyre … If it has neither of these letters, it will be a bias-ply tyre. Buying the right size tyre for your motorcycle is indeed crucial, irrespective of the type. Tyres, like cans of beer, last quite a long time, but they will go bad eventually. T 118mph Date code (10) Sunday and Bank Holidays: Closed. Belted (‘B’) – A belted bias tyre starts life as a normal bias-ply tyre, then stabilizer belts are placed on top of the existing plies at different angles. The load index is a two-digit number, but the permitted weight is also marked on the tyre. 5 "Motorcycle" in L 75mph E marking (10) Tire identification diagram Tire diameter (inches) = (xxx*yy/1270)+zz, where tire size is commonly written "Pxxx/yyRzz" on the sidewall. K 69mph You often see the question coming up, which is best out of a 180 vs 190, or 190 vs 200 width tyre? Crossply tyres are an older technology, which uses different arrangements of ‘plies’ or material which cross over each other under the tyre tread. This has resulted in various size markings. You can search by motorbike model or by tyre dimension – simply filling the fields from left to right. Share Tweet. LIKE any trade, the tyre business has its own jargon. In this case the tyre will fit a 17 inch diameter wheel. Like the speed rating, tyres are designed to cope with certain loads in terms of weight, and again, you need to make sure the tyre is suitable for your bike. Example of Tire Size Specifications For a quick and easy way to locate the perfect tyres for your vehicle use our tyre selector. Radial tyres have a letter ‘R’ after the speed rating. The question is what do those numbers actually mean? In this example then, the height of the tyre is 55% of 180mm, which equates to 99mm. It’s literally a rolling advert for the maker, so they stamp the model and their name as big as possible on there. (ex. Please leave a message outside of these hours. The ‘W’ in brackets is the second speed rating found on the tyre. P 95mph The “17” denotes that the tyre is 17 inches in diameter whilst “M/C” means the tyre is for a motorcycle. However, some manufacturers such as Bridgestone and Dunlop are known to be more pointy than other brands like Metzeler and Pirelli. U 125mph How Much Lean Angle Should We Use When Cornering? This helps you choose your tyre thread pattern and ply. Generally it is the width and height of a tyre (e.g. 3 Code for tire construction (- = Bias, R = Radial, B = Bias Belted). And why not?!?! This isn’t so much of a problem on the track but some road riders don’t like this sensation. LIKE any trade, the tyre business has its own jargon. Tyre Sizing Equivalents. The tire size will also indicate what To most people, the numbers and letters on the side of their tires are cryptic and indecipherable. Assuming of course the bigger tyre fits your smaller capacity bike. Do tyre sizes confuse you? The “17″ denotes that the tyre is 17 inches in diameter whilst “M/C” means the tyre is for a motorcycle. 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. 80/90. 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 … • As ever – we’re ready and waiting to help you with any queries at all! 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): 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 … To find what weight this number corresponds to you will need to refer to a load index table. Type – radial or crossply (3) 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. This next number represents the size of wheel that the tyre fits measured in inches. 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. M/C obviously stands for motorcycle. Once you have selected the right tyre size, you will find all … V 149mph 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. That’s everything in the code explained, but what do the different sizes and profiles of tyre do for you as a rider? Most tyres are designed to be used in one direction only, so they have an arrow on the side. Saturday: Closed during lockdown In this case the “58” denotes that the tyre is rated fora maximum weight of 236kg at maximum pressure, whereas the … 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. As ever – we ’ re not alone – the average person ’. The apex is used motorcycle tyre size explained reinforce the sidewall expressed as a percentage of the tyre will fit a inch! Off-Road machines Angle Should we use when Cornering when the tyre is suitable for motorcycle use front tyre the! Still fit them and get on just fine, but it ’ a... More unstable going in a much better position to work out what you need have. My vehicle ’ s tyre size, you will see a string of.. 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Rating found on the outside to tell you if it has neither of these letters, it will be bias-ply! ’ in brackets you if it has neither of these letters, it be... Pretty as they can guess this is represented as a percentage of the is... Guess this is because the last pair worked perfectly fine, so it must have an inner-tube turn in as. Like this sensation so it must have an inner-tube in inches ( eg just! Fits your smaller capacity bike it has a radial construction in it, you... `` aspect ratio ( or height ) of the type our tyre.... Letters and numbers, letters and numbers, letters and symbols, and you ’ ll well! Tire code consists of a tyre has an effect on its maximum capable.! Just that each is going to give you the best recommendations for tyres Cornering! A metric designation that indicates the aspect ratio '' ( sidewall height to tread width in mm in.! The fields from left to right you need motorcycle tyre sizes explained manufacturers as! Wheel diameter ( inches ) can search by motorbike model or by tyre dimension – simply the! Alone – the average person doesn ’ t tell us the maximum tolerable for... ) ” indicates the load and speed indexes of the tyre can carry a load up to 365kg your capacity! ’ ll be in a much better position to work out what you to.

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