Which Mountain Bike Tire Size Should I Use and Why? 29 x 2.0, 27.5 x 2.4, 29 x 2.8). They offer a super-plush ride thanks to their higher volume, extra traction for a more confident ride, more capability to ride in loose conditions or even snow, and ultimate rollover capability. What are Fat Tire Bikes and Why are they so Popular? What do 26in, 27.5in, and 29in Actually Mean? The letter used to denote the width, though today, it is meaningless since you can get either 700C or 650B tires in varying degrees of narrowness. Read the Size Carefully. Method Two: Calculating the bike size: Take off your shoes and stand with your legs about 15-20 cm(6” – 8”) apart. However, we’ve also learned that pedaling efficiency and power output in the saddle depend on getting the right bike fit and positioning. Mountain bike wheel sizes: 26in, 650b and 29in explained. These sizes can be thought of as a sort of shorthand for decimal sizes, each with a corresponding ISO measurement. Today, we technically have three or four mountain bike wheel sizes in use, with two dominating the scene. If all three have a 15” frame, there will be a height difference between them due to their wheel size. This size is best for those who favor maneuverability and want a snappy bike that they can easily get off the ground. Before we go down the rabbit hole of the sizing systems, let’s count our blessings that most, if not all, modern tires and rims come with ISO sizes on them. It’s important to note that you cannot mix fractional markings with decimals. It offers a more playful ride feel, quicker acceleration off the line and out of corners, nimbler handling for maneuvering around obstacles, and is the best choice for smaller riders, downhill racers and many gravity riders. As a general rule, decimal (26 x 1.75) and fractional (26 x 1 3/4) sizes are not the same, despite being mathematically identical. Choose how you want to get in touch. The 700 is a measurement of the diameter of the wheel in millimeters. In detail, they use the same rim diameter as 29″ and 27.5” bikes, but the rims and tires are wider. We’re going to look at ISO sizing first. At least I hope it is, because I ask myself the same question regularly. It remains as a carry-over from an old French sizing system, because, well, that’s the bike industry for you. This information may be used for marketing purposes by Trek Bicycle, its subsidiaries, its affiliate Trek Travel LLC, and your local dealers. Most mountain bikes today are offered in one of two wheel sizes: 27.5˝ (also know as 650b) or 29˝ (called 29ers), with traditional 26˝ wheels reserved for dirt jump, freeride, and kids’ bikes. Thankfully, these days, we have ISO (formerly ETRTO), which gives us a number that looks like 30-584 on both rims and tires. Count your blessings before bed every night that you live in a time where the ISO sizing system exists, and stick with it whenever you can. Bike frames are measured from the middle of their bottom bracket to the end of their seat tube. Alibaba.com offers 2,684 standard mountain bike tire size products. 29" The 29er another popular size for mountain bike wheels and tires. If these numbers don’t match, there’s a very good chance it won’t fit. Check your tire’s sidewall—the numbers there indicate your tire size (roughly its outer diameter and its width, but not always in that order). Why on earth would they do it like that?” and that’s a sensible thing to ask. 597mm: 26x1 1/4, 26x1 3/8 (S-6) For example, wherever you see a wheel advertised as 26″, it’s almost always the equivalent to the decimal size 26×1.0 and has an ISO bead seat diameter of 559mm. Although mountain bike tires are 26 inches in diameter, you must still find the width. The second number, 584, is universal between tires and rims. The 26-inch wheel, slightly smaller in diameter than the 650c wheel but generally much wider, is standard on mountain and comfort bikes. Unless you feel like torturing yourself with understanding the other sizes and how they relate to each other, you’re almost definitely going to be ok by just relying on ISO. ISO is the international sizing standard for bike tires and rims, and boy is it a lifesaver. MOUNTAIN BIKE TIRES. They’re the de-facto standard today because they provide much of the benefits of the larger 29″ wheel, but with a fraction of the weight penalty. I wish someone had sat me down and told me that at the very beginning. When a 2″ wide tyre is mounted on such rim, the outer diameter of such wheel with inflated tyre is around 660 mm (26″). ISO sizing is the most intuitive, the easiest to compare, and the most commonly adopted sizing system today. Most mountain bike tire widths are specified in inches, which typically range from 2.0 to 2.4 inches for cross-country and trail bikes, while enduro and downhill bikes will have even wider tires. Most typical 26-inch tires have a width of about 1.75 inches up to 2.2 inches. Mountain Bike tire 24/26/27.5 x 1.95/2.1, 24/26/27.5 x 1.95/2.1 Bike Tires tubeless, Bicycle Cross Country Wire Bead Tires, All Terrain, Drainage, Non-Slip and Durable, Fit XC AM DH FR 4.3 out of 5 … What mountain bike wheel size is right for me. With French measurements and mountain bike tires, all you really need to know is that 650B = 27.5″ and 700C = 29″. The first mountain bikes were adapted from beach cruisers, which used 26-inch tires, so that's how it became the de facto standard for mountain bikes. These widely used measurements refer to the tire’s diameter, and are typically paired with a tire width in inches when written out, (i.e. The original 26″ wheel size is all-but-dead, surviving only on fat bikes, entry-level bikes, and a handful of trials, DH, & DJ bikes. 622mm: 700C, 29inch: Modern road bikes, hybrids, 29" mountain bikes. Tube vs Tubeless Mountain Bike Tires: Are Tubeless Always Better? A wide variety of standard mountain bike tire size options are available to you, such as use, is_customized, and load capacity. and 29in. Mountains bikes now come in three different wheel sizes. But when it comes to measuring up tires and rims, there’s plenty more to worry about. Twenty-Six inch is the most commonly used size for modern mountain bikes and is also used on many hybrid or utility bikes. The typical tire size for an early 21st century road or hybrid bike is 700c. And right behind those big 29ers are wheels of yet another size. To illustrate this, I’ve condensed the information that Giant Bicycles made available regarding 27.5″ wheels into this handy graphic that shows why 27.5″ gives you the best of both worlds: You can click the image above to open in a new tab. This chart will provide guidance on what tires sizes can match your internal rim width. Downhill bikes, which are meant to withstand the abuse of drops and rock gardens, are typically equipped with tires up to 2.5" wide. Start your search for a new tire with this number. 630mm: 27 x anything: Older road bikes. Each frame size is paired with the wheel that best fits the rider and sets them up for optimal efficiency and power transfer. Most mountain bikes today are offered in one of two wheel sizes: 27.5˝ (also know as 650b) or 29˝ (called 29ers), with traditional 26˝ wheels reserved for dirt jump, freeride, and kids’ bikes. Measure the height from the ground to your crotch. Hopefully, that last paragraph will make a bit more sense later when we’ve covered the different sizing systems. The new standard in enduro tires Loose Loose Over Hard Medium. While there are variants to each size, here are the most common ISO Bead Seat Diameter measurements for mountain bike wheels: Sizes such as 700C and 650B come from an old French sizing system, where the number represents the outside diameter in millimeters. Many riders of full suspension trail bikes prioritize ride qualities other than efficiency, so our trail bike lineup offers a wide variety of wheel and tire options. Alan Hughes is a keen cycling enthusiast and writer. The primary consideration is whether you’ll appreciate the playful, precise feel of 27.5˝ wheels, or the speed and rollover capabilities of a 29er. We can use this to make sure the tire and rim are a good match for each other, and we don’t have to worry about fractions and decimals. Typical mountain bike tire: 2.2 and 27.5” indicate a tire that has a width of 2.2” and an outer diameter of 27.5" As a result, plus sized tires puts a lot more rubber on the ground, and gives you amazing traction. For ISO sizes (30-584), both numbers represent millimeters. 5’7″ – 5’11” = 17 – 19 inches. It;s actually the same bead-seat diameter as 700c tires, but most 29" tires are simply too wide and tall to … The most common question I receive regarding mountain bike wheel sizes is: which size is best to use, and why? So which wheel size is right for you? ISO TIRE SIZES; ISO Conventional Size Application; 635mm: 28x1 1/2, 700B: Commonly used in Asia and the Netherlands for utility bicycles. We pair 29˝ wheels with 17.5˝ and larger bikes, and better-fitting 27.5˝ wheels for 15.5˝ and smaller bikes. For example, a standard tire width is around 2”, while plus tires are 3” wide. While 26-inch wheels are still considered the “standard” for mountain bikes, 29-inch wheels are fast on their heels. The 650c size is used on some small women's bikes, as well as some triathlon bikes designed for larger riders. The 25–30mm-width rims are perfect for tire widths ranging from 2.35–2.6 inches. What about 650B and 700C. What’s the Difference Between 26″, 27.5″ and 29″ Mountain Bike Wheels? 6’2″ – 6’4″ = 21 – 23 inches. By submitting this form, you consent to sending the above information to Trek Bicycle, which will be stored in the United States. Here they are in a table to make them a little easier to comprehend. Once you’ve identified your tire diameter (29”, 27.5” or 26”), you’ll want to dial in your width: A cross-country bike will have tires in the 1.9" to 2.25" width range. You can click on the image to open in a new tab. The following diagram depicts how ISO measurements are interpreted on bike rims. ... 157mm spacing is also the standard … 5’3″ – 5’7″ = 15 – 17 inches. Measurements like 26×1½ (which is the 27.5″ size) and 28x(two fractions) (which is the 29″ size) are fractional inch markings. While 700C alone usually means 40-622 in ISO notation, 700x30C would be 30-622. The great news is that bike sizes are standardized so you don’t need to do difficult calculations to figure out the ideal size for your bike. In case the graphic above hasn’t done enough to quench your thirst for understanding, lets quickly touch on each wheel size and explain why and where they’re used. In this day and age, you can almost definitely get by with just a decent understanding of ISO sizing, so if that’s all you’re after, feel free to jump ahead to our ISO sizing section. Join our newsletter to keep up to date on the newest trends and product reviews. A hybrid of road and mountain tires, cyclocross tires are labeled as 700c and have widths indicated in millimeters like road bikes, yet are knobbie like mountain bike tires. You can find them with 26” wheels, 27.5” wheels, or 29” wheels. You’re unlikely to see these too often outside of road bikes, though. Thankfully, this is quite a straightforward line of questioning for wheel sizes, so we’ll get this out of the way early on. To illustrate this, I’ve condensed the information that Giant Bicyclesmade available r… The second number is always the Bead Seat Diameter (BSD) and should match on both rim and tire. In addition to the question of 27.5˝ vs. 29˝, there is now another variable to consider: plus-sized tires. For example, 26 x 1.95 means that the wheel diameter is 26 inches and the tire width is 1.95 inches. Sometimes referred to as 650B, the 27.5-inch wheel fits right in between the 26- and 29-inch offerings. The first number is the tire diameter. In this article, I’ll try my very best to explain what the common mountain bike wheel and tire sizing systems are, and how to understand them. So… The sizes you commonly see for mountain bike wheels, like 26in, 27.5in and 29in, all refer to the outside diameter of the wheel with the tire fully inflated. Although, certain models will even come in at up to 3 inches, however, this is not the standard. 6’4″ and taller = 23+ inches. The true diameter of a wheel measured tire-edge to tire-edge will differ quite a bit depending on the rim width, the tire pressure, and plenty of other factors. It offers more stability for increased confidence, more rubber on the ground for more traction, has better momentum and holds speed longer, rolls over obstacles more easily, and is great choice for beginners, most trail rides, and cross country or enduro racing. So far, we’ve talked about standard size labels (26″), which are shorthand for the decimal sizes, and touched on French sizes (650B). Get special offers, exclusive product news, and event info straight to your inbox. The original wheel size might have been an accidental standard based on beach cruisers, but it still has a lot going for it. Here at Trek, we’ve been studying wheel size for nearly two decades alongside mountain bike legend Gary Fisher, and our breadth of experience has provided unique insights about the riding characteristics and best applications for each mountain bike wheel size. That’s right, nothing at all. There are French sizes for variants of the 26″ wheel; however, the most common 26″ wheel, which is denoted by 26×1.0, or 559mm BSD, does not have a designated French size. Tire Size Chart For Bicycle Rim When it is time to replace your well-worn tires, it is a good opportunity to unlock the full potential of your wheels by trying something new. Some early 21st century mountain bikes have 29-inch wheels, which is the same diameter as 700c wheels but wider. for mountain bikes, and 700 for road bikes. These size labels come from an old French sizing standard, which we’ll cover in more detail in the French sizing section. Finding the right inner tube depends on the size of the tires on your bike. Whether you’re riding on hardpack, loose dirt or mud, Maxxis has the mountain bike tire for you. As the saying goes, the great thing about standards is that there are so many to choose from. Tubes can range anywhere from 1 to 3 inches or 19 to 45 millimeters, depending on the type of wheels you have. Consider the following pros and cons of each, and decide which size to test … It represents the Bead Seat Diameter (BSD) in millimeters. Sizes written as decimals, such as 2.75, are different than sizes expressed as fractions, such as 2 3/4. Alan has spent more than 20 years riding, maintaining and upgrading bikes as a hobby. While our trail bike lineup includes a wide variety of wheel and tire options for all types of riders, we keep things simple with our cross country mountain bikes, using an approach called Smart Wheel Size. Mountain Bike Tire Size and Width. Be sure of the type of bicycle you want: Mountain bike, city bike or road bike. and tire diameter (the size of your tire converted to millimeters) Wheel diameter = (rim diameter) + (tire diameter * 2). You can read about the different bike types from here. Decimals (26×1.75) are not interchangeable with Fractions (26×1¾) despite being mathematically identical. Initially created by the European Tyre and Rim Technical Organisation (ETRTO), it replaces the other archaic sizing systems and removes all the overlapping and annoyances that come with them. The most common options are 26in., 27.5in. All Mountain wheels are for riders who enjoy lively climbs but who do not wish to sacrifice confidence-inspiring performance on the descents. The most common question I receive regarding mountain bike wheel sizes is: which size is best to use, and why? Also commonly referred to as “casing width,” section width is expressed as the first two digits in the ETRTO size designation “XX – XXX” marked on the sidewall of every WTB tire. The standard size for thru-axle forks on mountain bikes used to be 15mm x 100mm, with 20mm x 110mm used mainly on downhill and freeride bikes. Mountain Bike Tire Wheel and Tire Width The second way that mountain bike tires are measured are by width. A visual comparison of 26, 27.5 and 29er wheels with tires. The ISO sizing system provides a measurement that looks like 30–584, which you’ll find on both rims and tires. When it comes to choosing width, there are two major factors at play. Rim diameter of a MTB is 559 mm. Or you can use the mountain bike frame size … When it comes to regular mountain bikes the width will vary from 1.6 inches to 2.5 inches thick. 599mm: 26x1.25, 26x1.375: Very old US lightweight bicycles. The only thing more confusing than searching for the right mountain bike tire — and right ply, and casing, and tread pattern, and compound — is making sure that it’s the correct tire width for the rim.. Today there are just as many rim width options as there are tire widths, especially following the introduction of fat bikes and plus tires to the mountain bike scene. This inaccuracy is especially true of 27.5″ wheels because the name 27.5″ doesn’t derive from the diameter of the wheel at all. Trek does not sell, trade, or rent your personal data to third parties. Tire section width is used to most accurately determine the size designation of a tire. Riders looking for the fastest and most efficient XC bikes will be ready to roll with Smart Wheel Size. For a detailed explanation of Trek’s collection and use of personal data please see the. The first number, 30, represents a different measurement on tires than it does on rims. Choose a category and then the size you require to find your perfect Maxxis tire Find Tires. While you can find a variety of bikes with wheel sizes ranging from 16 to 27.5 inches, the most common sizes include 26 inches, 27.5 inches, 29 inches and 700c. The tire size notation will consist of the wheel diameter and the tube width separated by the letter "x." 6’0″ – 6’2″ = 19 – 21 inches. If the second numbers match on a tire and a rim, the tire will likely fit the rim (with a few exceptions related to dramatic differences in width). Road bike tires generally come in three widths: 23c, 25c, and 28c (their width in mm). For extreme mountainbiking, we recommend tires at least 2.25-inch wide, for XC 1.90-inch tire, while for road cycling, 23mm is the optimal size, since it reaches a great balance between comfort and low rolling resistance. Wheel sizes don’t make very much sense; there, I said it. Their extra grip and forgiving ride make them perfect for those simply looking to have fun. What started as the standard for American made cruisers almost 100 years ago, later became the most popular mountain bike wheel size and remained on top for decades. Plus tires are 2.8˝ to 3.0˝ wide, offering even more traction and rollover capability and making them an excellent choice for beginners or those who prioritize grip over all else. The 650B wheels measures at about 27.5", and much like 29" mountain bikes, this intermediate size is growing in popularity. The letter at the end of a tire size is a throwback to an old French system when the letters a, b and c designated different inner tire diameters – it DOES NOT stand for cm. Since the tire wraps around your rim, the wheel diameter includes the tire on both sides (thus the multiplication by 2). Thankfully, this is quite a straightforward line of questioning for wheel sizes, so we’ll get this out of the way early on. You can also find varying widths denoted as 700x30C etc. In terms of mountain bike wheels, 650B is a standard 27.5″ wheel, and 700C is a standard 29″ wheel. You may opt out at any time by clicking on the “unsubscribe” link that appears at the bottom of each of our emails.
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